./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R --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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- 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-38b53e6 [2022-11-25 17:18:58,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:18:58,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:18:58,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:18:58,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:18:58,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:18:58,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:18:58,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:18:58,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:18:58,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:18:58,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:18:58,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:18:58,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:18:58,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:18:58,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:18:58,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:18:58,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:18:58,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:18:58,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:18:58,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:18:58,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:18:58,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:18:58,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:18:58,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:18:58,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:18:58,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:18:58,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:18:58,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:18:58,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:18:58,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:18:58,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:18:58,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:18:58,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:18:58,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:18:58,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:18:58,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:18:58,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:18:58,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:18:58,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:18:58,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:18:58,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:18:58,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:18:58,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:18:58,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:18:58,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:18:58,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:18:58,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:18:58,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:18:58,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:18:58,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:18:58,487 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:18:58,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:18:58,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:18:58,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:18:58,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:18:58,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:18:58,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:18:58,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:18:58,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:18:58,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:18:58,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:18:58,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:18:58,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:18:58,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:18:58,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:18:58,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:18:58,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:18:58,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:18:58,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:18:58,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:18:58,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:18:58,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:18:58,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:18:58,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:18:58,494 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:18:58,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:18:58,495 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-25 17:18:58,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:18:58,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:18:58,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:18:58,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:18:58,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:18:58,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-25 17:19:02,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:19:02,209 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:19:02,209 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-25 17:19:02,216 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/data/4b3865f2d/ccfc4923b76e4a9588405180570c6621/FLAG88ccdde5a [2022-11-25 17:19:02,230 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/data/4b3865f2d/ccfc4923b76e4a9588405180570c6621 [2022-11-25 17:19:02,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:19:02,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:19:02,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:02,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:19:02,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:19:02,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c463f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02, skipping insertion in model container [2022-11-25 17:19:02,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:19:02,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:19:02,563 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-25 17:19:02,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:02,591 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:19:02,616 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-25 17:19:02,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:19:02,638 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:19:02,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02 WrapperNode [2022-11-25 17:19:02,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:19:02,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:02,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:19:02,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:19:02,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,686 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 198 [2022-11-25 17:19:02,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:19:02,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:19:02,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:19:02,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:19:02,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,719 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:19:02,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:19:02,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:19:02,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:19:02,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (1/1) ... [2022-11-25 17:19:02,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:19:02,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:02,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:19:02,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:19:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:19:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:19:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:19:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:19:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:19:02,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:19:02,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:19:02,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:19:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:19:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:19:02,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:19:02,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:19:02,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:19:02,816 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:19:02,934 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:19:02,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:19:03,412 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:19:03,423 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:19:03,423 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:19:03,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:03 BoogieIcfgContainer [2022-11-25 17:19:03,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:19:03,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:19:03,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:19:03,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:19:03,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:19:02" (1/3) ... [2022-11-25 17:19:03,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a619247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:03, skipping insertion in model container [2022-11-25 17:19:03,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:19:02" (2/3) ... [2022-11-25 17:19:03,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a619247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:19:03, skipping insertion in model container [2022-11-25 17:19:03,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:19:03" (3/3) ... [2022-11-25 17:19:03,435 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-11-25 17:19:03,444 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:19:03,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:19:03,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:19:03,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:19:03,559 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:19:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 258 transitions, 532 flow [2022-11-25 17:19:03,773 INFO L130 PetriNetUnfolder]: 21/256 cut-off events. [2022-11-25 17:19:03,774 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 21/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-11-25 17:19:03,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 258 transitions, 532 flow [2022-11-25 17:19:03,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 247 transitions, 506 flow [2022-11-25 17:19:03,805 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:19:03,835 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 247 transitions, 506 flow [2022-11-25 17:19:03,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 247 transitions, 506 flow [2022-11-25 17:19:03,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 247 transitions, 506 flow [2022-11-25 17:19:03,940 INFO L130 PetriNetUnfolder]: 21/247 cut-off events. [2022-11-25 17:19:03,941 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:03,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 247 events. 21/247 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2022-11-25 17:19:03,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 6500 [2022-11-25 17:19:12,624 INFO L134 LiptonReduction]: Checked pairs total: 6513 [2022-11-25 17:19:12,624 INFO L136 LiptonReduction]: Total number of compositions: 279 [2022-11-25 17:19:12,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:19:12,660 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;@31cae94b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:19:12,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:19:12,667 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2022-11-25 17:19:12,671 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:19:12,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:12,674 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:12,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1715192579, now seen corresponding path program 1 times [2022-11-25 17:19:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:12,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971126738] [2022-11-25 17:19:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:13,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971126738] [2022-11-25 17:19:13,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971126738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:13,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:13,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:19:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431144601] [2022-11-25 17:19:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:19:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:19:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:19:14,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-11-25 17:19:14,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 222.14285714285714) internal successors, (1555), 7 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:14,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:14,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-11-25 17:19:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:14,794 INFO L130 PetriNetUnfolder]: 270/496 cut-off events. [2022-11-25 17:19:14,794 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-25 17:19:14,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 496 events. 270/496 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2135 event pairs, 20 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 320. Up to 134 conditions per place. [2022-11-25 17:19:14,809 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 94 selfloop transitions, 16 changer transitions 8/118 dead transitions. [2022-11-25 17:19:14,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 118 transitions, 535 flow [2022-11-25 17:19:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:19:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:19:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2764 transitions. [2022-11-25 17:19:14,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42892613283674735 [2022-11-25 17:19:14,845 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2764 transitions. [2022-11-25 17:19:14,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2764 transitions. [2022-11-25 17:19:14,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:14,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2764 transitions. [2022-11-25 17:19:14,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.33333333333334) internal successors, (2764), 12 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:14,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:14,892 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:14,894 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 12 states and 2764 transitions. [2022-11-25 17:19:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 118 transitions, 535 flow [2022-11-25 17:19:14,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 118 transitions, 493 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:14,902 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 157 flow [2022-11-25 17:19:14,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=157, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 17:19:14,908 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2022-11-25 17:19:14,908 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 157 flow [2022-11-25 17:19:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.14285714285714) internal successors, (1555), 7 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:14,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:14,910 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:19:14,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2115385861, now seen corresponding path program 2 times [2022-11-25 17:19:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161024222] [2022-11-25 17:19:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:15,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:15,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161024222] [2022-11-25 17:19:15,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161024222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:15,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:15,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:19:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527717792] [2022-11-25 17:19:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:19:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:19:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:19:15,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 537 [2022-11-25 17:19:15,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 222.14285714285714) internal successors, (1555), 7 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:15,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 537 [2022-11-25 17:19:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:15,929 INFO L130 PetriNetUnfolder]: 280/536 cut-off events. [2022-11-25 17:19:15,929 INFO L131 PetriNetUnfolder]: For 295/295 co-relation queries the response was YES. [2022-11-25 17:19:15,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 536 events. 280/536 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2446 event pairs, 24 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 921. Up to 134 conditions per place. [2022-11-25 17:19:15,934 INFO L137 encePairwiseOnDemand]: 529/537 looper letters, 82 selfloop transitions, 20 changer transitions 16/118 dead transitions. [2022-11-25 17:19:15,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 118 transitions, 606 flow [2022-11-25 17:19:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:19:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:19:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2758 transitions. [2022-11-25 17:19:15,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42799503414028556 [2022-11-25 17:19:15,943 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2758 transitions. [2022-11-25 17:19:15,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2758 transitions. [2022-11-25 17:19:15,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:15,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2758 transitions. [2022-11-25 17:19:15,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.83333333333334) internal successors, (2758), 12 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,966 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,966 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 157 flow. Second operand 12 states and 2758 transitions. [2022-11-25 17:19:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 118 transitions, 606 flow [2022-11-25 17:19:15,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 118 transitions, 604 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:19:15,976 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 253 flow [2022-11-25 17:19:15,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2022-11-25 17:19:15,977 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2022-11-25 17:19:15,977 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 253 flow [2022-11-25 17:19:15,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 222.14285714285714) internal successors, (1555), 7 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:15,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:15,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:19:15,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1714580735, now seen corresponding path program 1 times [2022-11-25 17:19:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518494822] [2022-11-25 17:19:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518494822] [2022-11-25 17:19:16,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518494822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983643205] [2022-11-25 17:19:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:16,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:16,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:16,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:19:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:19:16,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:16,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:16,829 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 164 treesize of output 145 [2022-11-25 17:19:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:16,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:17,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:17,171 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 191 treesize of output 171 [2022-11-25 17:19:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:17,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983643205] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:17,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:17,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-11-25 17:19:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980064669] [2022-11-25 17:19:17,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:17,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:19:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:19:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:19:17,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2022-11-25 17:19:17,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 253 flow. Second operand has 9 states, 9 states have (on average 213.77777777777777) internal successors, (1924), 9 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:17,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:17,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2022-11-25 17:19:17,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:18,160 INFO L130 PetriNetUnfolder]: 396/751 cut-off events. [2022-11-25 17:19:18,160 INFO L131 PetriNetUnfolder]: For 968/968 co-relation queries the response was YES. [2022-11-25 17:19:18,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 751 events. 396/751 cut-off events. For 968/968 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3637 event pairs, 212 based on Foata normal form. 13/675 useless extension candidates. Maximal degree in co-relation 1824. Up to 391 conditions per place. [2022-11-25 17:19:18,165 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 86 selfloop transitions, 12 changer transitions 5/103 dead transitions. [2022-11-25 17:19:18,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 660 flow [2022-11-25 17:19:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:19:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:19:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1783 transitions. [2022-11-25 17:19:18,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41503724394785846 [2022-11-25 17:19:18,172 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1783 transitions. [2022-11-25 17:19:18,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1783 transitions. [2022-11-25 17:19:18,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:18,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1783 transitions. [2022-11-25 17:19:18,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 222.875) internal successors, (1783), 8 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) [2022-11-25 17:19:18,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,189 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,189 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 253 flow. Second operand 8 states and 1783 transitions. [2022-11-25 17:19:18,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 660 flow [2022-11-25 17:19:18,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 633 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:18,198 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 319 flow [2022-11-25 17:19:18,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=319, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2022-11-25 17:19:18,199 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2022-11-25 17:19:18,199 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 319 flow [2022-11-25 17:19:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 213.77777777777777) internal successors, (1924), 9 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:18,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:18,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:18,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:18,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:18,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:18,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1355642083, now seen corresponding path program 2 times [2022-11-25 17:19:18,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:18,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880641865] [2022-11-25 17:19:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880641865] [2022-11-25 17:19:18,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880641865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:18,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309693906] [2022-11-25 17:19:18,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:18,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:18,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:18,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:19:18,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:19:18,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:18,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:19:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:19,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:19,035 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 130 treesize of output 111 [2022-11-25 17:19:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:19:19,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:19:19,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309693906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:19,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:19:19,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2022-11-25 17:19:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610658942] [2022-11-25 17:19:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:19,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:19:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:19:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:19:19,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 537 [2022-11-25 17:19:19,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 219.28571428571428) internal successors, (1535), 7 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:19,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 537 [2022-11-25 17:19:19,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:19,674 INFO L130 PetriNetUnfolder]: 378/732 cut-off events. [2022-11-25 17:19:19,674 INFO L131 PetriNetUnfolder]: For 1162/1162 co-relation queries the response was YES. [2022-11-25 17:19:19,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 732 events. 378/732 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3621 event pairs, 64 based on Foata normal form. 19/663 useless extension candidates. Maximal degree in co-relation 1819. Up to 324 conditions per place. [2022-11-25 17:19:19,679 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 65 selfloop transitions, 23 changer transitions 6/94 dead transitions. [2022-11-25 17:19:19,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 629 flow [2022-11-25 17:19:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:19:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:19:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1811 transitions. [2022-11-25 17:19:19,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42155493482309125 [2022-11-25 17:19:19,686 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1811 transitions. [2022-11-25 17:19:19,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1811 transitions. [2022-11-25 17:19:19,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:19,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1811 transitions. [2022-11-25 17:19:19,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 226.375) internal successors, (1811), 8 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,700 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,701 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 319 flow. Second operand 8 states and 1811 transitions. [2022-11-25 17:19:19,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 629 flow [2022-11-25 17:19:19,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 600 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-11-25 17:19:19,710 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 401 flow [2022-11-25 17:19:19,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=401, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2022-11-25 17:19:19,712 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 45 predicate places. [2022-11-25 17:19:19,712 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 401 flow [2022-11-25 17:19:19,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.28571428571428) internal successors, (1535), 7 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:19,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:19,714 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:19,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:19,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:19,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 589288066, now seen corresponding path program 1 times [2022-11-25 17:19:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:19,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078311120] [2022-11-25 17:19:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:19,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:20,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078311120] [2022-11-25 17:19:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078311120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751344740] [2022-11-25 17:19:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:20,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:19:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:19:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:20,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:20,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751344740] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:20,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:20,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-11-25 17:19:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156510304] [2022-11-25 17:19:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:20,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:19:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:19:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:19:20,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 537 [2022-11-25 17:19:20,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 401 flow. Second operand has 7 states, 7 states have (on average 220.42857142857142) internal successors, (1543), 7 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:20,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:20,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 537 [2022-11-25 17:19:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:21,036 INFO L130 PetriNetUnfolder]: 398/776 cut-off events. [2022-11-25 17:19:21,037 INFO L131 PetriNetUnfolder]: For 1704/1704 co-relation queries the response was YES. [2022-11-25 17:19:21,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 776 events. 398/776 cut-off events. For 1704/1704 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3948 event pairs, 126 based on Foata normal form. 0/688 useless extension candidates. Maximal degree in co-relation 2090. Up to 216 conditions per place. [2022-11-25 17:19:21,042 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 90 selfloop transitions, 15 changer transitions 8/113 dead transitions. [2022-11-25 17:19:21,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 113 transitions, 844 flow [2022-11-25 17:19:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:19:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:19:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2271 transitions. [2022-11-25 17:19:21,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4229050279329609 [2022-11-25 17:19:21,050 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2271 transitions. [2022-11-25 17:19:21,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2271 transitions. [2022-11-25 17:19:21,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:21,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2271 transitions. [2022-11-25 17:19:21,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 227.1) internal successors, (2271), 10 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,066 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,067 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 401 flow. Second operand 10 states and 2271 transitions. [2022-11-25 17:19:21,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 113 transitions, 844 flow [2022-11-25 17:19:21,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 825 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 17:19:21,078 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 433 flow [2022-11-25 17:19:21,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=433, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2022-11-25 17:19:21,079 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2022-11-25 17:19:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 433 flow [2022-11-25 17:19:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 220.42857142857142) internal successors, (1543), 7 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:21,080 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:21,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:21,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:21,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash 829841531, now seen corresponding path program 1 times [2022-11-25 17:19:21,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:21,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162868699] [2022-11-25 17:19:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:21,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162868699] [2022-11-25 17:19:21,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162868699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:21,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:21,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:19:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170805447] [2022-11-25 17:19:21,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:19:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:19:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:19:21,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 537 [2022-11-25 17:19:21,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:21,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 537 [2022-11-25 17:19:21,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:21,793 INFO L130 PetriNetUnfolder]: 262/536 cut-off events. [2022-11-25 17:19:21,793 INFO L131 PetriNetUnfolder]: For 1275/1275 co-relation queries the response was YES. [2022-11-25 17:19:21,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 536 events. 262/536 cut-off events. For 1275/1275 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2478 event pairs, 167 based on Foata normal form. 24/560 useless extension candidates. Maximal degree in co-relation 1648. Up to 383 conditions per place. [2022-11-25 17:19:21,796 INFO L137 encePairwiseOnDemand]: 531/537 looper letters, 37 selfloop transitions, 2 changer transitions 39/78 dead transitions. [2022-11-25 17:19:21,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 591 flow [2022-11-25 17:19:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:19:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:19:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1638 transitions. [2022-11-25 17:19:21,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2022-11-25 17:19:21,801 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1638 transitions. [2022-11-25 17:19:21,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1638 transitions. [2022-11-25 17:19:21,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:21,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1638 transitions. [2022-11-25 17:19:21,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,813 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,813 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 433 flow. Second operand 7 states and 1638 transitions. [2022-11-25 17:19:21,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 591 flow [2022-11-25 17:19:21,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 551 flow, removed 2 selfloop flow, removed 10 redundant places. [2022-11-25 17:19:21,820 INFO L231 Difference]: Finished difference. Result has 73 places, 39 transitions, 241 flow [2022-11-25 17:19:21,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=73, PETRI_TRANSITIONS=39} [2022-11-25 17:19:21,821 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2022-11-25 17:19:21,821 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 39 transitions, 241 flow [2022-11-25 17:19:21,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:21,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:21,822 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:19:21,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -748278961, now seen corresponding path program 1 times [2022-11-25 17:19:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:21,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446157713] [2022-11-25 17:19:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:19:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446157713] [2022-11-25 17:19:21,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446157713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:19:21,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:19:21,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:19:21,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789700563] [2022-11-25 17:19:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:21,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:19:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:19:21,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:19:22,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 537 [2022-11-25 17:19:22,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 39 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:22,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:22,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 537 [2022-11-25 17:19:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:22,284 INFO L130 PetriNetUnfolder]: 133/263 cut-off events. [2022-11-25 17:19:22,284 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2022-11-25 17:19:22,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 263 events. 133/263 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 878 event pairs, 79 based on Foata normal form. 12/275 useless extension candidates. Maximal degree in co-relation 894. Up to 188 conditions per place. [2022-11-25 17:19:22,286 INFO L137 encePairwiseOnDemand]: 532/537 looper letters, 26 selfloop transitions, 2 changer transitions 18/46 dead transitions. [2022-11-25 17:19:22,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 327 flow [2022-11-25 17:19:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:19:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:19:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1167 transitions. [2022-11-25 17:19:22,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346368715083799 [2022-11-25 17:19:22,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1167 transitions. [2022-11-25 17:19:22,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1167 transitions. [2022-11-25 17:19:22,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:22,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1167 transitions. [2022-11-25 17:19:22,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.4) internal successors, (1167), 5 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:22,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:22,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 537.0) internal successors, (3222), 6 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:22,298 INFO L175 Difference]: Start difference. First operand has 73 places, 39 transitions, 241 flow. Second operand 5 states and 1167 transitions. [2022-11-25 17:19:22,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 327 flow [2022-11-25 17:19:22,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 287 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-25 17:19:22,301 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 129 flow [2022-11-25 17:19:22,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2022-11-25 17:19:22,302 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2022-11-25 17:19:22,302 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 129 flow [2022-11-25 17:19:22,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.8) internal successors, (1144), 5 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:22,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:22,303 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:22,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:19:22,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -725208543, now seen corresponding path program 1 times [2022-11-25 17:19:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:22,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904349282] [2022-11-25 17:19:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904349282] [2022-11-25 17:19:23,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904349282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738761127] [2022-11-25 17:19:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:23,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:23,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:23,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:23,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:19:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:19:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:23,318 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 [2022-11-25 17:19:23,368 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 [2022-11-25 17:19:23,470 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 [2022-11-25 17:19:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:23,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:30,371 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:19:30,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,618 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-11-25 17:19:30,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,637 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 598 treesize of output 546 [2022-11-25 17:19:30,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,659 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 534 treesize of output 479 [2022-11-25 17:19:30,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,682 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 470 treesize of output 447 [2022-11-25 17:19:30,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,841 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-11-25 17:19:30,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,860 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 1206 treesize of output 1090 [2022-11-25 17:19:30,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,891 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 1078 treesize of output 959 [2022-11-25 17:19:30,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:30,921 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 950 treesize of output 895 [2022-11-25 17:19:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:31,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738761127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:31,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:31,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-11-25 17:19:31,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448225660] [2022-11-25 17:19:31,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:31,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:19:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:19:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=522, Unknown=35, NotChecked=0, Total=702 [2022-11-25 17:19:32,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 537 [2022-11-25 17:19:32,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 129 flow. Second operand has 27 states, 27 states have (on average 165.55555555555554) internal successors, (4470), 27 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:32,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:32,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 537 [2022-11-25 17:19:32,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:33,970 INFO L130 PetriNetUnfolder]: 294/521 cut-off events. [2022-11-25 17:19:33,970 INFO L131 PetriNetUnfolder]: For 812/812 co-relation queries the response was YES. [2022-11-25 17:19:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 521 events. 294/521 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2065 event pairs, 62 based on Foata normal form. 16/537 useless extension candidates. Maximal degree in co-relation 1606. Up to 156 conditions per place. [2022-11-25 17:19:33,974 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 70 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2022-11-25 17:19:33,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 89 transitions, 543 flow [2022-11-25 17:19:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:19:33,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:19:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2220 transitions. [2022-11-25 17:19:33,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31800601633003867 [2022-11-25 17:19:33,982 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2220 transitions. [2022-11-25 17:19:33,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2220 transitions. [2022-11-25 17:19:33,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:33,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2220 transitions. [2022-11-25 17:19:33,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.76923076923077) internal successors, (2220), 13 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:33,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,003 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,004 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 129 flow. Second operand 13 states and 2220 transitions. [2022-11-25 17:19:34,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 89 transitions, 543 flow [2022-11-25 17:19:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 473 flow, removed 33 selfloop flow, removed 6 redundant places. [2022-11-25 17:19:34,011 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 236 flow [2022-11-25 17:19:34,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=236, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2022-11-25 17:19:34,016 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2022-11-25 17:19:34,016 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 236 flow [2022-11-25 17:19:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 165.55555555555554) internal successors, (4470), 27 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:34,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:34,018 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:34,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:34,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 889935819, now seen corresponding path program 2 times [2022-11-25 17:19:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:34,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049206731] [2022-11-25 17:19:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:34,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:34,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049206731] [2022-11-25 17:19:34,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049206731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:34,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739735279] [2022-11-25 17:19:34,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:34,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:34,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:19:35,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:35,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:19:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:35,667 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-11-25 17:19:35,667 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 90 treesize of output 99 [2022-11-25 17:19:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:35,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739735279] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:35,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:35,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2022-11-25 17:19:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089248842] [2022-11-25 17:19:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:35,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:19:35,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:19:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:19:36,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:19:36,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:36,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:36,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:19:36,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:37,120 INFO L130 PetriNetUnfolder]: 351/618 cut-off events. [2022-11-25 17:19:37,120 INFO L131 PetriNetUnfolder]: For 1032/1032 co-relation queries the response was YES. [2022-11-25 17:19:37,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2221 conditions, 618 events. 351/618 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2579 event pairs, 96 based on Foata normal form. 2/620 useless extension candidates. Maximal degree in co-relation 2187. Up to 325 conditions per place. [2022-11-25 17:19:37,126 INFO L137 encePairwiseOnDemand]: 524/537 looper letters, 63 selfloop transitions, 37 changer transitions 0/100 dead transitions. [2022-11-25 17:19:37,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 742 flow [2022-11-25 17:19:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:19:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:19:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2747 transitions. [2022-11-25 17:19:37,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3934966337200974 [2022-11-25 17:19:37,135 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2747 transitions. [2022-11-25 17:19:37,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2747 transitions. [2022-11-25 17:19:37,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:37,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2747 transitions. [2022-11-25 17:19:37,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.30769230769232) internal successors, (2747), 13 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:37,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:37,155 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:37,156 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 236 flow. Second operand 13 states and 2747 transitions. [2022-11-25 17:19:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 742 flow [2022-11-25 17:19:37,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 706 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-11-25 17:19:37,163 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 505 flow [2022-11-25 17:19:37,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=505, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2022-11-25 17:19:37,164 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2022-11-25 17:19:37,164 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 505 flow [2022-11-25 17:19:37,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:37,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:37,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:37,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:37,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:37,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2127750603, now seen corresponding path program 3 times [2022-11-25 17:19:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165575194] [2022-11-25 17:19:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165575194] [2022-11-25 17:19:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165575194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166869191] [2022-11-25 17:19:38,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:19:38,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:38,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:38,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:38,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:19:38,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:19:38,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:19:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:38,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:38,860 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-25 17:19:38,861 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 58 treesize of output 60 [2022-11-25 17:19:38,894 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:19:38,894 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 20 treesize of output 4 [2022-11-25 17:19:38,903 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:19:38,903 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 20 treesize of output 4 [2022-11-25 17:19:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:39,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166869191] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:39,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:39,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 20 [2022-11-25 17:19:39,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272980391] [2022-11-25 17:19:39,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:19:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:19:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:19:40,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:19:40,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 505 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:40,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:19:40,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:40,923 INFO L130 PetriNetUnfolder]: 395/706 cut-off events. [2022-11-25 17:19:40,924 INFO L131 PetriNetUnfolder]: For 2493/2493 co-relation queries the response was YES. [2022-11-25 17:19:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 706 events. 395/706 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3080 event pairs, 133 based on Foata normal form. 16/722 useless extension candidates. Maximal degree in co-relation 3092. Up to 381 conditions per place. [2022-11-25 17:19:40,931 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 79 selfloop transitions, 28 changer transitions 0/107 dead transitions. [2022-11-25 17:19:40,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 1009 flow [2022-11-25 17:19:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:19:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:19:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2118 transitions. [2022-11-25 17:19:40,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.394413407821229 [2022-11-25 17:19:40,939 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2118 transitions. [2022-11-25 17:19:40,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2118 transitions. [2022-11-25 17:19:40,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:40,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2118 transitions. [2022-11-25 17:19:40,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 211.8) internal successors, (2118), 10 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,957 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,958 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 505 flow. Second operand 10 states and 2118 transitions. [2022-11-25 17:19:40,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 1009 flow [2022-11-25 17:19:40,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 922 flow, removed 40 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:40,972 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 630 flow [2022-11-25 17:19:40,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=630, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2022-11-25 17:19:40,973 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2022-11-25 17:19:40,973 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 630 flow [2022-11-25 17:19:40,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:40,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:40,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:40,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:41,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:19:41,181 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1059916775, now seen corresponding path program 4 times [2022-11-25 17:19:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:41,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902756043] [2022-11-25 17:19:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:41,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:41,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902756043] [2022-11-25 17:19:41,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902756043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261804647] [2022-11-25 17:19:41,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:19:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:41,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:41,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:19:41,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:19:41,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:19:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:42,019 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 [2022-11-25 17:19:42,067 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 [2022-11-25 17:19:42,105 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 [2022-11-25 17:19:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:19:42,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:19:42,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261804647] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:42,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:42,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2022-11-25 17:19:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357267622] [2022-11-25 17:19:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:19:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:19:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:19:43,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 537 [2022-11-25 17:19:43,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:43,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:43,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 537 [2022-11-25 17:19:43,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:44,484 INFO L130 PetriNetUnfolder]: 596/1066 cut-off events. [2022-11-25 17:19:44,485 INFO L131 PetriNetUnfolder]: For 4362/4362 co-relation queries the response was YES. [2022-11-25 17:19:44,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5021 conditions, 1066 events. 596/1066 cut-off events. For 4362/4362 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5280 event pairs, 151 based on Foata normal form. 16/1082 useless extension candidates. Maximal degree in co-relation 4979. Up to 723 conditions per place. [2022-11-25 17:19:44,497 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 99 selfloop transitions, 63 changer transitions 0/162 dead transitions. [2022-11-25 17:19:44,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 162 transitions, 1649 flow [2022-11-25 17:19:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:19:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:19:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1827 transitions. [2022-11-25 17:19:44,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42527932960893855 [2022-11-25 17:19:44,503 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1827 transitions. [2022-11-25 17:19:44,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1827 transitions. [2022-11-25 17:19:44,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:44,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1827 transitions. [2022-11-25 17:19:44,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 228.375) internal successors, (1827), 8 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:44,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:44,515 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:44,515 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 630 flow. Second operand 8 states and 1827 transitions. [2022-11-25 17:19:44,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 162 transitions, 1649 flow [2022-11-25 17:19:44,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 162 transitions, 1547 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-25 17:19:44,538 INFO L231 Difference]: Finished difference. Result has 80 places, 124 transitions, 1377 flow [2022-11-25 17:19:44,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=80, PETRI_TRANSITIONS=124} [2022-11-25 17:19:44,539 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2022-11-25 17:19:44,539 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 124 transitions, 1377 flow [2022-11-25 17:19:44,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:44,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:44,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:44,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:19:44,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1899625993, now seen corresponding path program 5 times [2022-11-25 17:19:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:44,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962847766] [2022-11-25 17:19:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:45,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:45,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962847766] [2022-11-25 17:19:45,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962847766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:45,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514003576] [2022-11-25 17:19:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:19:45,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:45,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:19:45,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:45,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:45,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:19:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:45,636 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 [2022-11-25 17:19:45,678 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 [2022-11-25 17:19:45,722 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 [2022-11-25 17:19:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:19:45,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:19:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514003576] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:46,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2022-11-25 17:19:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665227802] [2022-11-25 17:19:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:19:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:19:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:19:46,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 537 [2022-11-25 17:19:46,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 124 transitions, 1377 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:46,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:46,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 537 [2022-11-25 17:19:46,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:47,578 INFO L130 PetriNetUnfolder]: 648/1168 cut-off events. [2022-11-25 17:19:47,579 INFO L131 PetriNetUnfolder]: For 6344/6344 co-relation queries the response was YES. [2022-11-25 17:19:47,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6086 conditions, 1168 events. 648/1168 cut-off events. For 6344/6344 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5980 event pairs, 152 based on Foata normal form. 2/1170 useless extension candidates. Maximal degree in co-relation 6041. Up to 688 conditions per place. [2022-11-25 17:19:47,591 INFO L137 encePairwiseOnDemand]: 528/537 looper letters, 111 selfloop transitions, 63 changer transitions 0/174 dead transitions. [2022-11-25 17:19:47,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 174 transitions, 2073 flow [2022-11-25 17:19:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:19:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:19:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2044 transitions. [2022-11-25 17:19:47,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4229257190151045 [2022-11-25 17:19:47,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2044 transitions. [2022-11-25 17:19:47,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2044 transitions. [2022-11-25 17:19:47,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:47,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2044 transitions. [2022-11-25 17:19:47,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.11111111111111) internal successors, (2044), 9 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:47,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:47,609 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:47,610 INFO L175 Difference]: Start difference. First operand has 80 places, 124 transitions, 1377 flow. Second operand 9 states and 2044 transitions. [2022-11-25 17:19:47,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 174 transitions, 2073 flow [2022-11-25 17:19:47,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 174 transitions, 2025 flow, removed 24 selfloop flow, removed 0 redundant places. [2022-11-25 17:19:47,657 INFO L231 Difference]: Finished difference. Result has 92 places, 134 transitions, 1600 flow [2022-11-25 17:19:47,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1600, PETRI_PLACES=92, PETRI_TRANSITIONS=134} [2022-11-25 17:19:47,658 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2022-11-25 17:19:47,659 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 134 transitions, 1600 flow [2022-11-25 17:19:47,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:47,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:47,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:47,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:47,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:47,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1849231835, now seen corresponding path program 6 times [2022-11-25 17:19:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17693675] [2022-11-25 17:19:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17693675] [2022-11-25 17:19:48,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17693675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:48,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51232416] [2022-11-25 17:19:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:19:48,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:48,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:48,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:19:48,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:19:48,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:19:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:48,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:49,000 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:19:49,001 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 20 treesize of output 4 [2022-11-25 17:19:49,069 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 17:19:49,070 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 82 treesize of output 70 [2022-11-25 17:19:49,115 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:19:49,116 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 20 treesize of output 4 [2022-11-25 17:19:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:49,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51232416] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:49,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:49,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2022-11-25 17:19:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424841136] [2022-11-25 17:19:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:19:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:19:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:19:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:19:50,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:19:50,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 134 transitions, 1600 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:50,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:19:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:50,802 INFO L130 PetriNetUnfolder]: 636/1128 cut-off events. [2022-11-25 17:19:50,802 INFO L131 PetriNetUnfolder]: For 7018/7018 co-relation queries the response was YES. [2022-11-25 17:19:50,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6242 conditions, 1128 events. 636/1128 cut-off events. For 7018/7018 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5646 event pairs, 144 based on Foata normal form. 4/1132 useless extension candidates. Maximal degree in co-relation 6192. Up to 535 conditions per place. [2022-11-25 17:19:50,814 INFO L137 encePairwiseOnDemand]: 524/537 looper letters, 83 selfloop transitions, 89 changer transitions 0/172 dead transitions. [2022-11-25 17:19:50,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 172 transitions, 2202 flow [2022-11-25 17:19:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:19:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:19:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2746 transitions. [2022-11-25 17:19:50,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39335338776679557 [2022-11-25 17:19:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2746 transitions. [2022-11-25 17:19:50,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2746 transitions. [2022-11-25 17:19:50,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:50,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2746 transitions. [2022-11-25 17:19:50,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.23076923076923) internal successors, (2746), 13 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,840 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,840 INFO L175 Difference]: Start difference. First operand has 92 places, 134 transitions, 1600 flow. Second operand 13 states and 2746 transitions. [2022-11-25 17:19:50,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 172 transitions, 2202 flow [2022-11-25 17:19:50,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 2162 flow, removed 20 selfloop flow, removed 0 redundant places. [2022-11-25 17:19:50,895 INFO L231 Difference]: Finished difference. Result has 106 places, 138 transitions, 1833 flow [2022-11-25 17:19:50,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1833, PETRI_PLACES=106, PETRI_TRANSITIONS=138} [2022-11-25 17:19:50,896 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 81 predicate places. [2022-11-25 17:19:50,896 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 138 transitions, 1833 flow [2022-11-25 17:19:50,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:50,898 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:50,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:19:51,104 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:19:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1209408903, now seen corresponding path program 7 times [2022-11-25 17:19:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:19:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166427518] [2022-11-25 17:19:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:19:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:51,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:19:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166427518] [2022-11-25 17:19:51,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166427518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:19:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039076551] [2022-11-25 17:19:51,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:19:51,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:19:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:19:51,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:19:51,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:19:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:19:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:51,967 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 [2022-11-25 17:19:52,032 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 [2022-11-25 17:19:52,143 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 [2022-11-25 17:19:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:52,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:58,879 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:19:59,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,097 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-11-25 17:19:59,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,111 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 598 treesize of output 546 [2022-11-25 17:19:59,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,127 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 534 treesize of output 479 [2022-11-25 17:19:59,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,144 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 470 treesize of output 447 [2022-11-25 17:19:59,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,311 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-11-25 17:19:59,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,325 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 598 treesize of output 546 [2022-11-25 17:19:59,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,345 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 534 treesize of output 479 [2022-11-25 17:19:59,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:19:59,363 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 470 treesize of output 447 [2022-11-25 17:19:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:59,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039076551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:59,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:19:59,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-25 17:19:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044131240] [2022-11-25 17:19:59,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:59,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:19:59,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:19:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:19:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=581, Unknown=31, NotChecked=0, Total=756 [2022-11-25 17:20:00,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 537 [2022-11-25 17:20:00,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 138 transitions, 1833 flow. Second operand has 28 states, 28 states have (on average 165.5) internal successors, (4634), 28 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:00,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 537 [2022-11-25 17:20:00,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:02,254 INFO L130 PetriNetUnfolder]: 662/1168 cut-off events. [2022-11-25 17:20:02,255 INFO L131 PetriNetUnfolder]: For 8328/8328 co-relation queries the response was YES. [2022-11-25 17:20:02,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6700 conditions, 1168 events. 662/1168 cut-off events. For 8328/8328 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5873 event pairs, 141 based on Foata normal form. 10/1178 useless extension candidates. Maximal degree in co-relation 6644. Up to 407 conditions per place. [2022-11-25 17:20:02,268 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 106 selfloop transitions, 90 changer transitions 0/196 dead transitions. [2022-11-25 17:20:02,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 196 transitions, 2620 flow [2022-11-25 17:20:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:20:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:20:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2885 transitions. [2022-11-25 17:20:02,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3160258516814547 [2022-11-25 17:20:02,275 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2885 transitions. [2022-11-25 17:20:02,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2885 transitions. [2022-11-25 17:20:02,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:02,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2885 transitions. [2022-11-25 17:20:02,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 169.7058823529412) internal successors, (2885), 17 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,290 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,290 INFO L175 Difference]: Start difference. First operand has 106 places, 138 transitions, 1833 flow. Second operand 17 states and 2885 transitions. [2022-11-25 17:20:02,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 196 transitions, 2620 flow [2022-11-25 17:20:02,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 196 transitions, 2518 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-25 17:20:02,338 INFO L231 Difference]: Finished difference. Result has 118 places, 141 transitions, 1961 flow [2022-11-25 17:20:02,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1961, PETRI_PLACES=118, PETRI_TRANSITIONS=141} [2022-11-25 17:20:02,338 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 93 predicate places. [2022-11-25 17:20:02,339 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 141 transitions, 1961 flow [2022-11-25 17:20:02,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 165.5) internal successors, (4634), 28 states have internal predecessors, (4634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:02,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:02,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:02,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:02,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:02,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash 150484873, now seen corresponding path program 8 times [2022-11-25 17:20:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:02,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413094902] [2022-11-25 17:20:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:03,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413094902] [2022-11-25 17:20:03,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413094902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615472594] [2022-11-25 17:20:03,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:03,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:03,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:03,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:20:03,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:20:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:03,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:03,786 INFO L321 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2022-11-25 17:20:03,786 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 82 treesize of output 87 [2022-11-25 17:20:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615472594] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:04,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:04,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2022-11-25 17:20:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250140593] [2022-11-25 17:20:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:20:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:20:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:20:04,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 537 [2022-11-25 17:20:04,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 141 transitions, 1961 flow. Second operand has 10 states, 10 states have (on average 207.9) internal successors, (2079), 10 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:04,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:04,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 537 [2022-11-25 17:20:04,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:05,290 INFO L130 PetriNetUnfolder]: 837/1495 cut-off events. [2022-11-25 17:20:05,291 INFO L131 PetriNetUnfolder]: For 11729/11729 co-relation queries the response was YES. [2022-11-25 17:20:05,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1495 events. 837/1495 cut-off events. For 11729/11729 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8086 event pairs, 157 based on Foata normal form. 2/1497 useless extension candidates. Maximal degree in co-relation 8755. Up to 707 conditions per place. [2022-11-25 17:20:05,308 INFO L137 encePairwiseOnDemand]: 524/537 looper letters, 92 selfloop transitions, 121 changer transitions 0/213 dead transitions. [2022-11-25 17:20:05,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 213 transitions, 3145 flow [2022-11-25 17:20:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:20:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:20:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2751 transitions. [2022-11-25 17:20:05,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39406961753330466 [2022-11-25 17:20:05,314 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2751 transitions. [2022-11-25 17:20:05,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2751 transitions. [2022-11-25 17:20:05,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:05,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2751 transitions. [2022-11-25 17:20:05,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.6153846153846) internal successors, (2751), 13 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:05,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:05,327 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:05,328 INFO L175 Difference]: Start difference. First operand has 118 places, 141 transitions, 1961 flow. Second operand 13 states and 2751 transitions. [2022-11-25 17:20:05,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 213 transitions, 3145 flow [2022-11-25 17:20:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 213 transitions, 2878 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-11-25 17:20:05,400 INFO L231 Difference]: Finished difference. Result has 125 places, 171 transitions, 2573 flow [2022-11-25 17:20:05,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2573, PETRI_PLACES=125, PETRI_TRANSITIONS=171} [2022-11-25 17:20:05,401 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 100 predicate places. [2022-11-25 17:20:05,401 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 171 transitions, 2573 flow [2022-11-25 17:20:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.9) internal successors, (2079), 10 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:05,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:05,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:05,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:05,608 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -880911347, now seen corresponding path program 9 times [2022-11-25 17:20:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:05,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385115752] [2022-11-25 17:20:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385115752] [2022-11-25 17:20:06,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385115752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789693620] [2022-11-25 17:20:06,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:20:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:06,276 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:06,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:20:06,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:20:06,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:20:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:06,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:07,014 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:20:07,016 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 20 treesize of output 4 [2022-11-25 17:20:07,084 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 17:20:07,084 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 82 treesize of output 70 [2022-11-25 17:20:07,116 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:20:07,116 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 20 treesize of output 4 [2022-11-25 17:20:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:07,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789693620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:07,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:07,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-11-25 17:20:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026018120] [2022-11-25 17:20:07,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:07,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:20:07,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:20:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:20:09,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 537 [2022-11-25 17:20:09,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 171 transitions, 2573 flow. Second operand has 21 states, 21 states have (on average 204.9047619047619) internal successors, (4303), 21 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:09,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:09,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 537 [2022-11-25 17:20:09,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:10,103 INFO L130 PetriNetUnfolder]: 851/1517 cut-off events. [2022-11-25 17:20:10,104 INFO L131 PetriNetUnfolder]: For 15438/15438 co-relation queries the response was YES. [2022-11-25 17:20:10,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 1517 events. 851/1517 cut-off events. For 15438/15438 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8141 event pairs, 292 based on Foata normal form. 22/1539 useless extension candidates. Maximal degree in co-relation 9764. Up to 863 conditions per place. [2022-11-25 17:20:10,122 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 158 selfloop transitions, 49 changer transitions 0/207 dead transitions. [2022-11-25 17:20:10,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 207 transitions, 3264 flow [2022-11-25 17:20:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:20:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:20:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2302 transitions. [2022-11-25 17:20:10,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3897071271372947 [2022-11-25 17:20:10,128 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2302 transitions. [2022-11-25 17:20:10,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2302 transitions. [2022-11-25 17:20:10,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:10,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2302 transitions. [2022-11-25 17:20:10,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 209.27272727272728) internal successors, (2302), 11 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,142 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,142 INFO L175 Difference]: Start difference. First operand has 125 places, 171 transitions, 2573 flow. Second operand 11 states and 2302 transitions. [2022-11-25 17:20:10,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 207 transitions, 3264 flow [2022-11-25 17:20:10,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 207 transitions, 3193 flow, removed 32 selfloop flow, removed 4 redundant places. [2022-11-25 17:20:10,238 INFO L231 Difference]: Finished difference. Result has 132 places, 173 transitions, 2652 flow [2022-11-25 17:20:10,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2652, PETRI_PLACES=132, PETRI_TRANSITIONS=173} [2022-11-25 17:20:10,239 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 107 predicate places. [2022-11-25 17:20:10,239 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 173 transitions, 2652 flow [2022-11-25 17:20:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 204.9047619047619) internal successors, (4303), 21 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:10,240 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:10,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:10,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:10,455 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1855312887, now seen corresponding path program 10 times [2022-11-25 17:20:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481605626] [2022-11-25 17:20:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:11,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:11,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481605626] [2022-11-25 17:20:11,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481605626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:11,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300517926] [2022-11-25 17:20:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:20:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:11,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:11,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:20:11,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:20:11,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:11,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:20:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:11,249 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 [2022-11-25 17:20:11,291 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 [2022-11-25 17:20:11,324 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 [2022-11-25 17:20:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:20:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300517926] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:11,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:11,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2022-11-25 17:20:11,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687160644] [2022-11-25 17:20:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:11,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:20:11,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:20:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:20:12,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 537 [2022-11-25 17:20:12,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 173 transitions, 2652 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:12,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:12,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 537 [2022-11-25 17:20:12,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:13,538 INFO L130 PetriNetUnfolder]: 829/1495 cut-off events. [2022-11-25 17:20:13,538 INFO L131 PetriNetUnfolder]: For 14730/14730 co-relation queries the response was YES. [2022-11-25 17:20:13,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9680 conditions, 1495 events. 829/1495 cut-off events. For 14730/14730 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8126 event pairs, 180 based on Foata normal form. 22/1517 useless extension candidates. Maximal degree in co-relation 9614. Up to 802 conditions per place. [2022-11-25 17:20:13,553 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 117 selfloop transitions, 104 changer transitions 0/221 dead transitions. [2022-11-25 17:20:13,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 221 transitions, 3480 flow [2022-11-25 17:20:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:20:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:20:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1820 transitions. [2022-11-25 17:20:13,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4236499068901304 [2022-11-25 17:20:13,557 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1820 transitions. [2022-11-25 17:20:13,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1820 transitions. [2022-11-25 17:20:13,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:13,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1820 transitions. [2022-11-25 17:20:13,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 227.5) internal successors, (1820), 8 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:13,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:13,566 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 537.0) internal successors, (4833), 9 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:13,566 INFO L175 Difference]: Start difference. First operand has 132 places, 173 transitions, 2652 flow. Second operand 8 states and 1820 transitions. [2022-11-25 17:20:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 221 transitions, 3480 flow [2022-11-25 17:20:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 221 transitions, 3372 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-25 17:20:13,629 INFO L231 Difference]: Finished difference. Result has 135 places, 182 transitions, 3052 flow [2022-11-25 17:20:13,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3052, PETRI_PLACES=135, PETRI_TRANSITIONS=182} [2022-11-25 17:20:13,629 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 110 predicate places. [2022-11-25 17:20:13,629 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 182 transitions, 3052 flow [2022-11-25 17:20:13,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:13,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:13,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:13,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 17:20:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:20:13,830 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash -897091785, now seen corresponding path program 11 times [2022-11-25 17:20:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122640469] [2022-11-25 17:20:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:14,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122640469] [2022-11-25 17:20:14,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122640469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:14,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718555984] [2022-11-25 17:20:14,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:20:14,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:14,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:14,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:14,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:20:14,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:14,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:20:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:14,892 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 [2022-11-25 17:20:14,945 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 [2022-11-25 17:20:15,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:15,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:20:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-11-25 17:20:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:15,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:15,942 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 104 [2022-11-25 17:20:15,955 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:20:15,956 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 966 treesize of output 854 [2022-11-25 17:20:15,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:15,981 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 800 treesize of output 712 [2022-11-25 17:20:16,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:16,006 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 758 treesize of output 710 [2022-11-25 17:20:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:20:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718555984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:18,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-11-25 17:20:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846883858] [2022-11-25 17:20:18,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:20:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:20:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=695, Unknown=6, NotChecked=0, Total=812 [2022-11-25 17:20:20,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 537 [2022-11-25 17:20:20,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 182 transitions, 3052 flow. Second operand has 29 states, 29 states have (on average 165.75862068965517) internal successors, (4807), 29 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:20,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:20,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 537 [2022-11-25 17:20:20,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:22,590 INFO L130 PetriNetUnfolder]: 1126/2012 cut-off events. [2022-11-25 17:20:22,590 INFO L131 PetriNetUnfolder]: For 22221/22221 co-relation queries the response was YES. [2022-11-25 17:20:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13681 conditions, 2012 events. 1126/2012 cut-off events. For 22221/22221 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11340 event pairs, 92 based on Foata normal form. 36/2048 useless extension candidates. Maximal degree in co-relation 13613. Up to 735 conditions per place. [2022-11-25 17:20:22,605 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 214 selfloop transitions, 84 changer transitions 0/298 dead transitions. [2022-11-25 17:20:22,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 298 transitions, 5142 flow [2022-11-25 17:20:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:20:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:20:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2058 transitions. [2022-11-25 17:20:22,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.319366852886406 [2022-11-25 17:20:22,619 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2058 transitions. [2022-11-25 17:20:22,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2058 transitions. [2022-11-25 17:20:22,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:22,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2058 transitions. [2022-11-25 17:20:22,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 171.5) internal successors, (2058), 12 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:22,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:22,630 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:22,631 INFO L175 Difference]: Start difference. First operand has 135 places, 182 transitions, 3052 flow. Second operand 12 states and 2058 transitions. [2022-11-25 17:20:22,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 298 transitions, 5142 flow [2022-11-25 17:20:22,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 298 transitions, 5096 flow, removed 23 selfloop flow, removed 0 redundant places. [2022-11-25 17:20:22,769 INFO L231 Difference]: Finished difference. Result has 150 places, 199 transitions, 3516 flow [2022-11-25 17:20:22,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3516, PETRI_PLACES=150, PETRI_TRANSITIONS=199} [2022-11-25 17:20:22,770 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2022-11-25 17:20:22,770 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 199 transitions, 3516 flow [2022-11-25 17:20:22,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 165.75862068965517) internal successors, (4807), 29 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:22,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:22,771 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:22,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:22,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:20:22,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1791464743, now seen corresponding path program 12 times [2022-11-25 17:20:22,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:22,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683957428] [2022-11-25 17:20:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683957428] [2022-11-25 17:20:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683957428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270920808] [2022-11-25 17:20:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:20:23,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:23,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:20:23,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:20:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:20:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:24,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:24,231 INFO L321 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2022-11-25 17:20:24,231 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 90 treesize of output 99 [2022-11-25 17:20:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:24,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270920808] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:24,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:24,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2022-11-25 17:20:24,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477180935] [2022-11-25 17:20:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:20:24,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:20:24,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:20:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:20:25,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:20:25,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 199 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:25,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:20:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:25,762 INFO L130 PetriNetUnfolder]: 1127/2015 cut-off events. [2022-11-25 17:20:25,762 INFO L131 PetriNetUnfolder]: For 24691/24691 co-relation queries the response was YES. [2022-11-25 17:20:25,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14456 conditions, 2015 events. 1127/2015 cut-off events. For 24691/24691 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11355 event pairs, 232 based on Foata normal form. 2/2017 useless extension candidates. Maximal degree in co-relation 14380. Up to 967 conditions per place. [2022-11-25 17:20:25,782 INFO L137 encePairwiseOnDemand]: 524/537 looper letters, 98 selfloop transitions, 140 changer transitions 0/238 dead transitions. [2022-11-25 17:20:25,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 238 transitions, 4281 flow [2022-11-25 17:20:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:20:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:20:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2743 transitions. [2022-11-25 17:20:25,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3929236499068901 [2022-11-25 17:20:25,792 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2743 transitions. [2022-11-25 17:20:25,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2743 transitions. [2022-11-25 17:20:25,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:25,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2743 transitions. [2022-11-25 17:20:25,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 211.0) internal successors, (2743), 13 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,806 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:25,807 INFO L175 Difference]: Start difference. First operand has 150 places, 199 transitions, 3516 flow. Second operand 13 states and 2743 transitions. [2022-11-25 17:20:25,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 238 transitions, 4281 flow [2022-11-25 17:20:26,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 238 transitions, 4148 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-11-25 17:20:26,030 INFO L231 Difference]: Finished difference. Result has 158 places, 204 transitions, 3800 flow [2022-11-25 17:20:26,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3800, PETRI_PLACES=158, PETRI_TRANSITIONS=204} [2022-11-25 17:20:26,031 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2022-11-25 17:20:26,031 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 204 transitions, 3800 flow [2022-11-25 17:20:26,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:26,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:26,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:26,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:26,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:26,237 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1728987627, now seen corresponding path program 13 times [2022-11-25 17:20:26,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:26,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127865866] [2022-11-25 17:20:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:26,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:26,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127865866] [2022-11-25 17:20:26,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127865866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366381717] [2022-11-25 17:20:26,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:20:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:26,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:27,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:20:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:20:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:27,324 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 [2022-11-25 17:20:27,401 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 [2022-11-25 17:20:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:27,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:20:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:27,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:28,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,601 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-25 17:20:28,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,618 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 146 treesize of output 134 [2022-11-25 17:20:28,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-11-25 17:20:28,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,639 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 114 treesize of output 111 [2022-11-25 17:20:28,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,751 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 107 [2022-11-25 17:20:28,770 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:20:28,770 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 1970 treesize of output 1754 [2022-11-25 17:20:28,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,809 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 1754 treesize of output 1654 [2022-11-25 17:20:28,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:28,857 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 1646 treesize of output 1454 [2022-11-25 17:20:53,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:53,237 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-25 17:20:53,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:53,257 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 146 treesize of output 134 [2022-11-25 17:20:53,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-11-25 17:20:53,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:20:53,279 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 114 treesize of output 111 [2022-11-25 17:20:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:53,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366381717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:53,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:20:53,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-25 17:20:53,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015613903] [2022-11-25 17:20:53,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:53,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:20:53,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:20:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:20:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=673, Unknown=15, NotChecked=0, Total=812 [2022-11-25 17:20:55,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 537 [2022-11-25 17:20:55,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 204 transitions, 3800 flow. Second operand has 29 states, 29 states have (on average 165.44827586206895) internal successors, (4798), 29 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:55,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:55,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 537 [2022-11-25 17:20:55,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:58,454 INFO L130 PetriNetUnfolder]: 1227/2223 cut-off events. [2022-11-25 17:20:58,455 INFO L131 PetriNetUnfolder]: For 29118/29118 co-relation queries the response was YES. [2022-11-25 17:20:58,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16142 conditions, 2223 events. 1227/2223 cut-off events. For 29118/29118 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12879 event pairs, 132 based on Foata normal form. 28/2251 useless extension candidates. Maximal degree in co-relation 16065. Up to 802 conditions per place. [2022-11-25 17:20:58,478 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 149 selfloop transitions, 163 changer transitions 0/312 dead transitions. [2022-11-25 17:20:58,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 312 transitions, 5675 flow [2022-11-25 17:20:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:20:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:20:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2904 transitions. [2022-11-25 17:20:58,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3181071311206047 [2022-11-25 17:20:58,483 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2904 transitions. [2022-11-25 17:20:58,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2904 transitions. [2022-11-25 17:20:58,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:58,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2904 transitions. [2022-11-25 17:20:58,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,499 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 537.0) internal successors, (9666), 18 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,499 INFO L175 Difference]: Start difference. First operand has 158 places, 204 transitions, 3800 flow. Second operand 17 states and 2904 transitions. [2022-11-25 17:20:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 312 transitions, 5675 flow [2022-11-25 17:20:58,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 312 transitions, 5516 flow, removed 36 selfloop flow, removed 6 redundant places. [2022-11-25 17:20:58,707 INFO L231 Difference]: Finished difference. Result has 175 places, 242 transitions, 4926 flow [2022-11-25 17:20:58,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4926, PETRI_PLACES=175, PETRI_TRANSITIONS=242} [2022-11-25 17:20:58,708 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 150 predicate places. [2022-11-25 17:20:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 242 transitions, 4926 flow [2022-11-25 17:20:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 165.44827586206895) internal successors, (4798), 29 states have internal predecessors, (4798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:58,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:58,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:58,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:58,916 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:20:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2913523, now seen corresponding path program 14 times [2022-11-25 17:20:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:20:58,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414304412] [2022-11-25 17:20:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:58,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:20:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:59,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:20:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414304412] [2022-11-25 17:20:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414304412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:20:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141971734] [2022-11-25 17:20:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:20:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:20:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:20:59,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:20:59,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:20:59,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:20:59,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 17:20:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:20:59,786 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:20:59,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 17:20:59,830 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 [2022-11-25 17:20:59,885 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:20:59,885 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 [2022-11-25 17:20:59,943 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 [2022-11-25 17:21:00,002 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 [2022-11-25 17:21:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:21:00,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:21:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:00,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:00,629 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~a2~0.offset))) (let ((.cse0 (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736) ~a2~0.base) .cse2) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (and (or (< 0 c_~n1~0) .cse0) (or (< 0 c_~n2~0) .cse0) (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736))) (let ((.cse1 (select .cse5 ~a2~0.base))) (let ((.cse4 (select (select .cse5 c_~a1~0.base) c_~a1~0.offset)) (.cse3 (select .cse1 c_~a2~0.offset))) (or (not (= (select .cse1 .cse2) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (= .cse3 .cse4) (< (+ .cse3 2147483648) .cse4) (< (+ 2147483647 .cse4) .cse3))))))))) is different from false [2022-11-25 17:21:00,660 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_thread1Thread1of1ForFork1_~i~0#1| 4))) (let ((.cse2 (+ .cse7 c_~a2~0.offset)) (.cse3 (select (select |c_#memory_int| c_~a1~0.base) (+ .cse7 c_~a1~0.offset)))) (let ((.cse0 (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736) ~a2~0.base) .cse2) .cse3))))) (and (or (< 0 c_~n1~0) .cse0) (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736))) (let ((.cse1 (select .cse6 ~a2~0.base))) (let ((.cse5 (select (select .cse6 c_~a1~0.base) c_~a1~0.offset)) (.cse4 (select .cse1 c_~a2~0.offset))) (or (not (= (select .cse1 .cse2) .cse3)) (= .cse4 .cse5) (< (+ .cse4 2147483648) .cse5) (< (+ 2147483647 .cse5) .cse4)))))) (or .cse0 (< 0 c_~n2~0)))))) is different from false [2022-11-25 17:21:00,686 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~a1~0.base) c_~a1~0.offset))) (let ((.cse0 (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736) ~a2~0.base) c_~a2~0.offset) .cse2))))) (and (or (< 0 c_~n1~0) .cse0) (forall ((v_ArrVal_736 (Array Int Int)) (~a2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_736))) (let ((.cse3 (select (select .cse4 c_~a1~0.base) c_~a1~0.offset)) (.cse1 (select (select .cse4 ~a2~0.base) c_~a2~0.offset))) (or (not (= .cse1 .cse2)) (= .cse1 .cse3) (< (+ .cse1 2147483648) .cse3) (< (+ 2147483647 .cse3) .cse1))))) (or (< 0 c_~n2~0) .cse0)))) is different from false [2022-11-25 17:21:01,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:01,252 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 131 [2022-11-25 17:21:01,304 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:21:01,306 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 16822 treesize of output 15862 [2022-11-25 17:21:01,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:01,467 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 15862 treesize of output 14206 [2022-11-25 17:21:01,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:01,648 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 14198 treesize of output 13246 [2022-11-25 17:21:01,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:01,826 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 13238 treesize of output 12766 [2022-11-25 17:21:28,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:28,212 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2022-11-25 17:21:28,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:28,232 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 4790 treesize of output 4418 [2022-11-25 17:21:28,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:28,275 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 4406 treesize of output 4223 [2022-11-25 17:21:28,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:28,328 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 4214 treesize of output 3839 [2022-11-25 17:21:28,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3830 treesize of output 3574 [2022-11-25 17:21:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141971734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:28,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:28,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-25 17:21:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210254266] [2022-11-25 17:21:28,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:21:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:21:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=565, Unknown=42, NotChecked=156, Total=870 [2022-11-25 17:21:29,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 537 [2022-11-25 17:21:29,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 242 transitions, 4926 flow. Second operand has 30 states, 30 states have (on average 163.46666666666667) internal successors, (4904), 30 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:29,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:29,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 537 [2022-11-25 17:21:29,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:31,770 INFO L130 PetriNetUnfolder]: 1208/2170 cut-off events. [2022-11-25 17:21:31,771 INFO L131 PetriNetUnfolder]: For 31186/31186 co-relation queries the response was YES. [2022-11-25 17:21:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16876 conditions, 2170 events. 1208/2170 cut-off events. For 31186/31186 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12343 event pairs, 383 based on Foata normal form. 6/2176 useless extension candidates. Maximal degree in co-relation 16793. Up to 1369 conditions per place. [2022-11-25 17:21:31,789 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 149 selfloop transitions, 116 changer transitions 0/265 dead transitions. [2022-11-25 17:21:31,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 265 transitions, 5608 flow [2022-11-25 17:21:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:21:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:21:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2342 transitions. [2022-11-25 17:21:31,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3115190210162277 [2022-11-25 17:21:31,793 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2342 transitions. [2022-11-25 17:21:31,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2342 transitions. [2022-11-25 17:21:31,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:31,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2342 transitions. [2022-11-25 17:21:31,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.28571428571428) internal successors, (2342), 14 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:31,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:31,806 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 537.0) internal successors, (8055), 15 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:31,807 INFO L175 Difference]: Start difference. First operand has 175 places, 242 transitions, 4926 flow. Second operand 14 states and 2342 transitions. [2022-11-25 17:21:31,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 265 transitions, 5608 flow [2022-11-25 17:21:31,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 265 transitions, 5462 flow, removed 21 selfloop flow, removed 8 redundant places. [2022-11-25 17:21:31,983 INFO L231 Difference]: Finished difference. Result has 182 places, 240 transitions, 4973 flow [2022-11-25 17:21:31,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4973, PETRI_PLACES=182, PETRI_TRANSITIONS=240} [2022-11-25 17:21:31,984 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 157 predicate places. [2022-11-25 17:21:31,984 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 240 transitions, 4973 flow [2022-11-25 17:21:31,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 163.46666666666667) internal successors, (4904), 30 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:31,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:31,985 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:21:31,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:32,185 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash -235665101, now seen corresponding path program 15 times [2022-11-25 17:21:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:32,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42863318] [2022-11-25 17:21:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:32,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:32,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42863318] [2022-11-25 17:21:32,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42863318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500314919] [2022-11-25 17:21:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:32,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:32,716 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:32,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:21:32,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:21:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 17:21:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:33,260 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:21:33,261 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 20 treesize of output 4 [2022-11-25 17:21:33,327 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-11-25 17:21:33,328 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 82 treesize of output 70 [2022-11-25 17:21:33,357 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 17:21:33,357 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 20 treesize of output 4 [2022-11-25 17:21:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500314919] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:33,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:21:33,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2022-11-25 17:21:33,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498691415] [2022-11-25 17:21:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:21:33,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:21:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:21:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:21:34,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:21:34,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 240 transitions, 4973 flow. Second operand has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:34,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:34,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:21:34,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:35,222 INFO L130 PetriNetUnfolder]: 1194/2116 cut-off events. [2022-11-25 17:21:35,222 INFO L131 PetriNetUnfolder]: For 31480/31480 co-relation queries the response was YES. [2022-11-25 17:21:35,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16821 conditions, 2116 events. 1194/2116 cut-off events. For 31480/31480 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11827 event pairs, 244 based on Foata normal form. 2/2118 useless extension candidates. Maximal degree in co-relation 16736. Up to 1119 conditions per place. [2022-11-25 17:21:35,239 INFO L137 encePairwiseOnDemand]: 524/537 looper letters, 104 selfloop transitions, 161 changer transitions 0/265 dead transitions. [2022-11-25 17:21:35,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 265 transitions, 5597 flow [2022-11-25 17:21:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:21:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:21:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2530 transitions. [2022-11-25 17:21:35,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3926132836747362 [2022-11-25 17:21:35,245 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2530 transitions. [2022-11-25 17:21:35,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2530 transitions. [2022-11-25 17:21:35,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:35,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2530 transitions. [2022-11-25 17:21:35,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.83333333333334) internal successors, (2530), 12 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,257 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,257 INFO L175 Difference]: Start difference. First operand has 182 places, 240 transitions, 4973 flow. Second operand 12 states and 2530 transitions. [2022-11-25 17:21:35,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 265 transitions, 5597 flow [2022-11-25 17:21:35,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 5412 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-25 17:21:35,428 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 5050 flow [2022-11-25 17:21:35,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5050, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2022-11-25 17:21:35,428 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2022-11-25 17:21:35,428 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 5050 flow [2022-11-25 17:21:35,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.9) internal successors, (2069), 10 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:35,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:35,429 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] [2022-11-25 17:21:35,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:35,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:21:35,629 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash -610896761, now seen corresponding path program 1 times [2022-11-25 17:21:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221016751] [2022-11-25 17:21:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:21:36,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221016751] [2022-11-25 17:21:36,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221016751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512124732] [2022-11-25 17:21:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:36,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:36,037 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:36,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:21:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 17:21:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:36,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:36,613 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 134 treesize of output 115 [2022-11-25 17:21:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:21:36,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:36,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:36,827 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 191 treesize of output 171 [2022-11-25 17:21:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:21:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512124732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:37,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-25 17:21:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817214896] [2022-11-25 17:21:37,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:21:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:21:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:21:38,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 537 [2022-11-25 17:21:38,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 5050 flow. Second operand has 24 states, 24 states have (on average 213.91666666666666) internal successors, (5134), 24 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:38,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:38,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 537 [2022-11-25 17:21:38,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:21:41,938 INFO L130 PetriNetUnfolder]: 4667/8340 cut-off events. [2022-11-25 17:21:41,938 INFO L131 PetriNetUnfolder]: For 135378/135378 co-relation queries the response was YES. [2022-11-25 17:21:41,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67482 conditions, 8340 events. 4667/8340 cut-off events. For 135378/135378 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 61072 event pairs, 1133 based on Foata normal form. 102/8442 useless extension candidates. Maximal degree in co-relation 64926. Up to 2513 conditions per place. [2022-11-25 17:21:42,101 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 888 selfloop transitions, 115 changer transitions 16/1019 dead transitions. [2022-11-25 17:21:42,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1019 transitions, 23232 flow [2022-11-25 17:21:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:21:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:21:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4380 transitions. [2022-11-25 17:21:42,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40782122905027934 [2022-11-25 17:21:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4380 transitions. [2022-11-25 17:21:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4380 transitions. [2022-11-25 17:21:42,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:21:42,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4380 transitions. [2022-11-25 17:21:42,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:42,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 537.0) internal successors, (11277), 21 states have internal predecessors, (11277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:42,128 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 537.0) internal successors, (11277), 21 states have internal predecessors, (11277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:42,128 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 5050 flow. Second operand 20 states and 4380 transitions. [2022-11-25 17:21:42,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1019 transitions, 23232 flow [2022-11-25 17:21:43,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1019 transitions, 21957 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-11-25 17:21:43,051 INFO L231 Difference]: Finished difference. Result has 199 places, 351 transitions, 7415 flow [2022-11-25 17:21:43,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7415, PETRI_PLACES=199, PETRI_TRANSITIONS=351} [2022-11-25 17:21:43,052 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 174 predicate places. [2022-11-25 17:21:43,052 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 351 transitions, 7415 flow [2022-11-25 17:21:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 213.91666666666666) internal successors, (5134), 24 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:43,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:43,053 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] [2022-11-25 17:21:43,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 17:21:43,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:43,254 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:21:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1334271544, now seen corresponding path program 1 times [2022-11-25 17:21:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:21:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997184661] [2022-11-25 17:21:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:43,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:21:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:21:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997184661] [2022-11-25 17:21:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997184661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:21:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209175585] [2022-11-25 17:21:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:21:44,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:21:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:21:44,540 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:21:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:21:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:21:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:21:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:44,841 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 [2022-11-25 17:21:44,903 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 [2022-11-25 17:21:44,958 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 [2022-11-25 17:21:45,463 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:21:45,463 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 39 treesize of output 19 [2022-11-25 17:21:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:45,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:46,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:46,783 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:21:46,805 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:21:46,805 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 566 treesize of output 509 [2022-11-25 17:21:46,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:46,820 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 502 treesize of output 446 [2022-11-25 17:21:46,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:46,838 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 438 treesize of output 414 [2022-11-25 17:21:47,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:47,467 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:21:47,484 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:21:47,484 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 566 treesize of output 509 [2022-11-25 17:21:47,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:47,502 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 502 treesize of output 478 [2022-11-25 17:21:47,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:21:47,521 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 470 treesize of output 414 [2022-11-25 17:21:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:48,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209175585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:48,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:21:48,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2022-11-25 17:21:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586324687] [2022-11-25 17:21:48,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:21:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:21:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:21:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1155, Unknown=16, NotChecked=0, Total=1406 [2022-11-25 17:21:50,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:21:53,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:21:55,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:21:57,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:21:59,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:02,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:04,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:06,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:08,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:10,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:12,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:14,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:16,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:18,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:20,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:23,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:25,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:27,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:29,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:22:29,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 537 [2022-11-25 17:22:29,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 351 transitions, 7415 flow. Second operand has 38 states, 38 states have (on average 156.57894736842104) internal successors, (5950), 38 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:29,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:29,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 537 [2022-11-25 17:22:29,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:38,707 INFO L130 PetriNetUnfolder]: 4909/8885 cut-off events. [2022-11-25 17:22:38,707 INFO L131 PetriNetUnfolder]: For 138902/138902 co-relation queries the response was YES. [2022-11-25 17:22:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71205 conditions, 8885 events. 4909/8885 cut-off events. For 138902/138902 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 67036 event pairs, 522 based on Foata normal form. 27/8912 useless extension candidates. Maximal degree in co-relation 68476. Up to 3186 conditions per place. [2022-11-25 17:22:38,786 INFO L137 encePairwiseOnDemand]: 521/537 looper letters, 520 selfloop transitions, 245 changer transitions 39/804 dead transitions. [2022-11-25 17:22:38,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 804 transitions, 15880 flow [2022-11-25 17:22:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:22:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-25 17:22:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6945 transitions. [2022-11-25 17:22:38,795 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3007665324152267 [2022-11-25 17:22:38,795 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6945 transitions. [2022-11-25 17:22:38,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6945 transitions. [2022-11-25 17:22:38,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:38,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6945 transitions. [2022-11-25 17:22:38,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 161.51162790697674) internal successors, (6945), 43 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:38,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 537.0) internal successors, (23628), 44 states have internal predecessors, (23628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:38,829 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 537.0) internal successors, (23628), 44 states have internal predecessors, (23628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:38,829 INFO L175 Difference]: Start difference. First operand has 199 places, 351 transitions, 7415 flow. Second operand 43 states and 6945 transitions. [2022-11-25 17:22:38,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 804 transitions, 15880 flow [2022-11-25 17:22:40,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 804 transitions, 15757 flow, removed 60 selfloop flow, removed 2 redundant places. [2022-11-25 17:22:40,449 INFO L231 Difference]: Finished difference. Result has 255 places, 496 transitions, 10677 flow [2022-11-25 17:22:40,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10677, PETRI_PLACES=255, PETRI_TRANSITIONS=496} [2022-11-25 17:22:40,450 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2022-11-25 17:22:40,450 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 496 transitions, 10677 flow [2022-11-25 17:22:40,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 156.57894736842104) internal successors, (5950), 38 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:40,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:40,451 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] [2022-11-25 17:22:40,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:40,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:40,651 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1657453376, now seen corresponding path program 2 times [2022-11-25 17:22:40,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001288006] [2022-11-25 17:22:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:41,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001288006] [2022-11-25 17:22:41,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001288006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:41,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293511329] [2022-11-25 17:22:41,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:22:41,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:41,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:41,504 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:41,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:22:41,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:22:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:22:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:41,944 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:22:41,945 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 69 treesize of output 33 [2022-11-25 17:22:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:22:42,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:22:42,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293511329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:42,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:22:42,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 17 [2022-11-25 17:22:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844920144] [2022-11-25 17:22:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:22:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:22:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:22:42,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:22:42,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 496 transitions, 10677 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:42,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:42,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:22:42,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:46,055 INFO L130 PetriNetUnfolder]: 4893/8864 cut-off events. [2022-11-25 17:22:46,055 INFO L131 PetriNetUnfolder]: For 164474/164474 co-relation queries the response was YES. [2022-11-25 17:22:46,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75339 conditions, 8864 events. 4893/8864 cut-off events. For 164474/164474 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 66820 event pairs, 1628 based on Foata normal form. 40/8904 useless extension candidates. Maximal degree in co-relation 74794. Up to 6048 conditions per place. [2022-11-25 17:22:46,141 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 407 selfloop transitions, 136 changer transitions 11/554 dead transitions. [2022-11-25 17:22:46,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 554 transitions, 12564 flow [2022-11-25 17:22:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:22:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:22:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2130 transitions. [2022-11-25 17:22:46,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39664804469273746 [2022-11-25 17:22:46,144 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2130 transitions. [2022-11-25 17:22:46,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2130 transitions. [2022-11-25 17:22:46,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:46,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2130 transitions. [2022-11-25 17:22:46,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 213.0) internal successors, (2130), 10 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,154 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,154 INFO L175 Difference]: Start difference. First operand has 255 places, 496 transitions, 10677 flow. Second operand 10 states and 2130 transitions. [2022-11-25 17:22:46,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 554 transitions, 12564 flow [2022-11-25 17:22:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 554 transitions, 12342 flow, removed 78 selfloop flow, removed 16 redundant places. [2022-11-25 17:22:48,167 INFO L231 Difference]: Finished difference. Result has 245 places, 496 transitions, 10764 flow [2022-11-25 17:22:48,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=10467, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10764, PETRI_PLACES=245, PETRI_TRANSITIONS=496} [2022-11-25 17:22:48,168 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 220 predicate places. [2022-11-25 17:22:48,168 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 496 transitions, 10764 flow [2022-11-25 17:22:48,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:48,168 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] [2022-11-25 17:22:48,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:22:48,369 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -774793006, now seen corresponding path program 3 times [2022-11-25 17:22:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:48,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382286156] [2022-11-25 17:22:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:49,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382286156] [2022-11-25 17:22:49,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382286156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:49,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563407782] [2022-11-25 17:22:49,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:22:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:49,190 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:49,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:22:49,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:22:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:22:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:49,592 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:22:49,593 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 52 treesize of output 24 [2022-11-25 17:22:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:22:49,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:22:49,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563407782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:49,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:22:49,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 17 [2022-11-25 17:22:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250891716] [2022-11-25 17:22:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:22:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:22:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:22:50,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:22:50,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 496 transitions, 10764 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:50,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:50,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:22:50,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:53,190 INFO L130 PetriNetUnfolder]: 4861/8832 cut-off events. [2022-11-25 17:22:53,190 INFO L131 PetriNetUnfolder]: For 166075/166075 co-relation queries the response was YES. [2022-11-25 17:22:53,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75476 conditions, 8832 events. 4861/8832 cut-off events. For 166075/166075 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 66785 event pairs, 1602 based on Foata normal form. 40/8872 useless extension candidates. Maximal degree in co-relation 75085. Up to 6048 conditions per place. [2022-11-25 17:22:53,288 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 402 selfloop transitions, 132 changer transitions 19/553 dead transitions. [2022-11-25 17:22:53,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 553 transitions, 12607 flow [2022-11-25 17:22:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:22:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:22:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2336 transitions. [2022-11-25 17:22:53,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39546300998814965 [2022-11-25 17:22:53,293 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2336 transitions. [2022-11-25 17:22:53,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2336 transitions. [2022-11-25 17:22:53,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:53,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2336 transitions. [2022-11-25 17:22:53,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.36363636363637) internal successors, (2336), 11 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:53,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:53,302 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:53,302 INFO L175 Difference]: Start difference. First operand has 245 places, 496 transitions, 10764 flow. Second operand 11 states and 2336 transitions. [2022-11-25 17:22:53,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 553 transitions, 12607 flow [2022-11-25 17:22:55,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 553 transitions, 12309 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-11-25 17:22:55,538 INFO L231 Difference]: Finished difference. Result has 246 places, 488 transitions, 10631 flow [2022-11-25 17:22:55,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=10484, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10631, PETRI_PLACES=246, PETRI_TRANSITIONS=488} [2022-11-25 17:22:55,539 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2022-11-25 17:22:55,539 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 488 transitions, 10631 flow [2022-11-25 17:22:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:55,540 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] [2022-11-25 17:22:55,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-25 17:22:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:22:55,741 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:22:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1737006484, now seen corresponding path program 4 times [2022-11-25 17:22:55,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:55,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926847779] [2022-11-25 17:22:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:55,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926847779] [2022-11-25 17:22:56,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926847779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492521664] [2022-11-25 17:22:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:22:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:56,634 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:56,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:22:56,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:22:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:22:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:56,888 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 [2022-11-25 17:22:56,919 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 [2022-11-25 17:22:56,961 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 [2022-11-25 17:22:57,428 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:22:57,429 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 39 treesize of output 19 [2022-11-25 17:22:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:22:57,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:22:58,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492521664] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:58,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:22:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 12] total 30 [2022-11-25 17:22:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730569025] [2022-11-25 17:22:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:22:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:22:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:22:59,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 537 [2022-11-25 17:22:59,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 488 transitions, 10631 flow. Second operand has 9 states, 9 states have (on average 212.22222222222223) internal successors, (1910), 9 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:59,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:59,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 537 [2022-11-25 17:22:59,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:04,667 INFO L130 PetriNetUnfolder]: 4869/8836 cut-off events. [2022-11-25 17:23:04,667 INFO L131 PetriNetUnfolder]: For 165870/165870 co-relation queries the response was YES. [2022-11-25 17:23:04,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75626 conditions, 8836 events. 4869/8836 cut-off events. For 165870/165870 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 66688 event pairs, 1806 based on Foata normal form. 4/8840 useless extension candidates. Maximal degree in co-relation 75219. Up to 7603 conditions per place. [2022-11-25 17:23:04,774 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 465 selfloop transitions, 76 changer transitions 13/554 dead transitions. [2022-11-25 17:23:04,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 554 transitions, 12554 flow [2022-11-25 17:23:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:23:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:23:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1959 transitions. [2022-11-25 17:23:04,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053382991930478 [2022-11-25 17:23:04,778 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1959 transitions. [2022-11-25 17:23:04,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1959 transitions. [2022-11-25 17:23:04,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:04,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1959 transitions. [2022-11-25 17:23:04,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.66666666666666) internal successors, (1959), 9 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,785 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,785 INFO L175 Difference]: Start difference. First operand has 246 places, 488 transitions, 10631 flow. Second operand 9 states and 1959 transitions. [2022-11-25 17:23:04,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 554 transitions, 12554 flow [2022-11-25 17:23:06,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 554 transitions, 12196 flow, removed 31 selfloop flow, removed 11 redundant places. [2022-11-25 17:23:06,473 INFO L231 Difference]: Finished difference. Result has 242 places, 496 transitions, 10667 flow [2022-11-25 17:23:06,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=10347, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10667, PETRI_PLACES=242, PETRI_TRANSITIONS=496} [2022-11-25 17:23:06,474 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 217 predicate places. [2022-11-25 17:23:06,474 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 496 transitions, 10667 flow [2022-11-25 17:23:06,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 212.22222222222223) internal successors, (1910), 9 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:06,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:06,475 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] [2022-11-25 17:23:06,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:23:06,675 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:23:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1958651524, now seen corresponding path program 5 times [2022-11-25 17:23:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750016965] [2022-11-25 17:23:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:07,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750016965] [2022-11-25 17:23:07,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750016965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:07,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599729071] [2022-11-25 17:23:07,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:23:07,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:07,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:07,784 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:07,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:23:07,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 17:23:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:07,963 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-25 17:23:07,963 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 17:23:08,062 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 17:23:08,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:23:08,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-25 17:23:08,175 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 [2022-11-25 17:23:08,235 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 [2022-11-25 17:23:08,667 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:23:08,667 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 39 treesize of output 19 [2022-11-25 17:23:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:08,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:14,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:14,095 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:23:14,111 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:23:14,111 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 566 treesize of output 509 [2022-11-25 17:23:14,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:14,132 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 502 treesize of output 446 [2022-11-25 17:23:14,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:14,154 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 438 treesize of output 414 [2022-11-25 17:23:15,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:15,260 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:23:15,274 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:23:15,275 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 278 treesize of output 253 [2022-11-25 17:23:15,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:15,290 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 246 treesize of output 222 [2022-11-25 17:23:15,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:15,310 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 214 treesize of output 206 [2022-11-25 17:23:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599729071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:15,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:15,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2022-11-25 17:23:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55947809] [2022-11-25 17:23:15,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:15,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:23:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:23:15,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1148, Unknown=16, NotChecked=0, Total=1406 [2022-11-25 17:23:16,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 537 [2022-11-25 17:23:16,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 496 transitions, 10667 flow. Second operand has 38 states, 38 states have (on average 154.57894736842104) internal successors, (5874), 38 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:16,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:16,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 537 [2022-11-25 17:23:16,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:28,937 INFO L130 PetriNetUnfolder]: 6036/11144 cut-off events. [2022-11-25 17:23:28,937 INFO L131 PetriNetUnfolder]: For 203976/203976 co-relation queries the response was YES. [2022-11-25 17:23:29,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93712 conditions, 11144 events. 6036/11144 cut-off events. For 203976/203976 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 89158 event pairs, 579 based on Foata normal form. 121/11265 useless extension candidates. Maximal degree in co-relation 93197. Up to 3952 conditions per place. [2022-11-25 17:23:29,081 INFO L137 encePairwiseOnDemand]: 521/537 looper letters, 591 selfloop transitions, 455 changer transitions 35/1081 dead transitions. [2022-11-25 17:23:29,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1081 transitions, 22223 flow [2022-11-25 17:23:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 17:23:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-25 17:23:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 9252 transitions. [2022-11-25 17:23:29,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2970525910229243 [2022-11-25 17:23:29,097 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 9252 transitions. [2022-11-25 17:23:29,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 9252 transitions. [2022-11-25 17:23:29,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:29,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 9252 transitions. [2022-11-25 17:23:29,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 159.51724137931035) internal successors, (9252), 58 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 537.0) internal successors, (31683), 59 states have internal predecessors, (31683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,139 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 537.0) internal successors, (31683), 59 states have internal predecessors, (31683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:29,139 INFO L175 Difference]: Start difference. First operand has 242 places, 496 transitions, 10667 flow. Second operand 58 states and 9252 transitions. [2022-11-25 17:23:29,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1081 transitions, 22223 flow [2022-11-25 17:23:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1081 transitions, 22102 flow, removed 40 selfloop flow, removed 3 redundant places. [2022-11-25 17:23:32,003 INFO L231 Difference]: Finished difference. Result has 302 places, 696 transitions, 15954 flow [2022-11-25 17:23:32,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=10492, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15954, PETRI_PLACES=302, PETRI_TRANSITIONS=696} [2022-11-25 17:23:32,004 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 277 predicate places. [2022-11-25 17:23:32,004 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 696 transitions, 15954 flow [2022-11-25 17:23:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 154.57894736842104) internal successors, (5874), 38 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:32,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:32,006 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] [2022-11-25 17:23:32,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-25 17:23:32,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:23:32,211 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:23:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1752467280, now seen corresponding path program 6 times [2022-11-25 17:23:32,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:32,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020048263] [2022-11-25 17:23:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:32,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:33,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020048263] [2022-11-25 17:23:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020048263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523348901] [2022-11-25 17:23:33,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:23:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:33,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:33,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:23:33,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 17:23:33,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:23:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:33,856 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:23:33,856 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 39 treesize of output 19 [2022-11-25 17:23:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:23:33,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:23:33,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523348901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:33,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:23:33,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-11-25 17:23:33,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720431176] [2022-11-25 17:23:33,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:33,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:23:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:23:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:23:34,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 537 [2022-11-25 17:23:34,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 696 transitions, 15954 flow. Second operand has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:34,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:34,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 537 [2022-11-25 17:23:34,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:39,128 INFO L130 PetriNetUnfolder]: 5953/10964 cut-off events. [2022-11-25 17:23:39,129 INFO L131 PetriNetUnfolder]: For 211191/211191 co-relation queries the response was YES. [2022-11-25 17:23:39,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95802 conditions, 10964 events. 5953/10964 cut-off events. For 211191/211191 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 87069 event pairs, 2000 based on Foata normal form. 10/10974 useless extension candidates. Maximal degree in co-relation 95073. Up to 7612 conditions per place. [2022-11-25 17:23:39,275 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 543 selfloop transitions, 179 changer transitions 36/758 dead transitions. [2022-11-25 17:23:39,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 758 transitions, 18146 flow [2022-11-25 17:23:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:23:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:23:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2738 transitions. [2022-11-25 17:23:39,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.392207420140381 [2022-11-25 17:23:39,279 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2738 transitions. [2022-11-25 17:23:39,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2738 transitions. [2022-11-25 17:23:39,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:39,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2738 transitions. [2022-11-25 17:23:39,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.6153846153846) internal successors, (2738), 13 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,286 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 537.0) internal successors, (7518), 14 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,286 INFO L175 Difference]: Start difference. First operand has 302 places, 696 transitions, 15954 flow. Second operand 13 states and 2738 transitions. [2022-11-25 17:23:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 758 transitions, 18146 flow [2022-11-25 17:23:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 758 transitions, 16987 flow, removed 319 selfloop flow, removed 19 redundant places. [2022-11-25 17:23:42,534 INFO L231 Difference]: Finished difference. Result has 295 places, 680 transitions, 14876 flow [2022-11-25 17:23:42,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14872, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14876, PETRI_PLACES=295, PETRI_TRANSITIONS=680} [2022-11-25 17:23:42,536 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 270 predicate places. [2022-11-25 17:23:42,536 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 680 transitions, 14876 flow [2022-11-25 17:23:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:42,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:42,537 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] [2022-11-25 17:23:42,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:23:42,743 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:23:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2147084046, now seen corresponding path program 7 times [2022-11-25 17:23:42,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105437071] [2022-11-25 17:23:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:43,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105437071] [2022-11-25 17:23:43,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105437071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:43,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217775726] [2022-11-25 17:23:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:23:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:43,667 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:43,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:23:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:23:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:43,946 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 [2022-11-25 17:23:44,091 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 [2022-11-25 17:23:44,141 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 [2022-11-25 17:23:44,415 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:23:44,415 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 39 treesize of output 19 [2022-11-25 17:23:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:49,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:49,482 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:23:49,497 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:23:49,498 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 278 treesize of output 253 [2022-11-25 17:23:49,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:49,511 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 246 treesize of output 238 [2022-11-25 17:23:49,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:49,524 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 230 treesize of output 206 [2022-11-25 17:23:49,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:49,978 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:23:49,995 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:23:49,995 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 1142 treesize of output 1021 [2022-11-25 17:23:50,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:50,016 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 1014 treesize of output 958 [2022-11-25 17:23:50,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:23:50,038 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 950 treesize of output 830 [2022-11-25 17:23:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:55,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217775726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:55,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:55,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-11-25 17:23:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958044441] [2022-11-25 17:23:55,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:23:55,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:23:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1081, Unknown=13, NotChecked=0, Total=1260 [2022-11-25 17:23:56,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 537 [2022-11-25 17:23:56,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 680 transitions, 14876 flow. Second operand has 36 states, 36 states have (on average 156.52777777777777) internal successors, (5635), 36 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:56,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:56,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 537 [2022-11-25 17:23:56,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:03,168 INFO L130 PetriNetUnfolder]: 6441/11959 cut-off events. [2022-11-25 17:24:03,169 INFO L131 PetriNetUnfolder]: For 211812/211812 co-relation queries the response was YES. [2022-11-25 17:24:03,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101360 conditions, 11959 events. 6441/11959 cut-off events. For 211812/211812 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 97888 event pairs, 1761 based on Foata normal form. 25/11984 useless extension candidates. Maximal degree in co-relation 100772. Up to 6653 conditions per place. [2022-11-25 17:24:03,294 INFO L137 encePairwiseOnDemand]: 521/537 looper letters, 514 selfloop transitions, 295 changer transitions 44/853 dead transitions. [2022-11-25 17:24:03,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 853 transitions, 19123 flow [2022-11-25 17:24:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:24:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:24:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4174 transitions. [2022-11-25 17:24:03,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2989543045408967 [2022-11-25 17:24:03,300 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4174 transitions. [2022-11-25 17:24:03,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4174 transitions. [2022-11-25 17:24:03,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:03,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4174 transitions. [2022-11-25 17:24:03,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 160.53846153846155) internal successors, (4174), 26 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:03,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 537.0) internal successors, (14499), 27 states have internal predecessors, (14499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:03,316 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 537.0) internal successors, (14499), 27 states have internal predecessors, (14499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:03,316 INFO L175 Difference]: Start difference. First operand has 295 places, 680 transitions, 14876 flow. Second operand 26 states and 4174 transitions. [2022-11-25 17:24:03,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 853 transitions, 19123 flow [2022-11-25 17:24:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 853 transitions, 18667 flow, removed 52 selfloop flow, removed 8 redundant places. [2022-11-25 17:24:06,170 INFO L231 Difference]: Finished difference. Result has 316 places, 728 transitions, 16349 flow [2022-11-25 17:24:06,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14524, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16349, PETRI_PLACES=316, PETRI_TRANSITIONS=728} [2022-11-25 17:24:06,172 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 291 predicate places. [2022-11-25 17:24:06,172 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 728 transitions, 16349 flow [2022-11-25 17:24:06,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 156.52777777777777) internal successors, (5635), 36 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:06,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:06,173 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] [2022-11-25 17:24:06,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:06,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:06,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:24:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash 445389280, now seen corresponding path program 8 times [2022-11-25 17:24:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:06,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4991308] [2022-11-25 17:24:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:06,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:07,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:07,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4991308] [2022-11-25 17:24:07,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4991308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:07,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584430036] [2022-11-25 17:24:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:24:07,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:07,580 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:07,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:24:07,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:24:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:24:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:08,207 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:08,208 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 39 treesize of output 19 [2022-11-25 17:24:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:24:08,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:08,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584430036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:08,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:24:08,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 19 [2022-11-25 17:24:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776351877] [2022-11-25 17:24:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:08,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:24:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:24:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:24:08,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:24:08,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 728 transitions, 16349 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:08,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:08,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:24:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:13,349 INFO L130 PetriNetUnfolder]: 6334/11687 cut-off events. [2022-11-25 17:24:13,349 INFO L131 PetriNetUnfolder]: For 238236/238236 co-relation queries the response was YES. [2022-11-25 17:24:13,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104028 conditions, 11687 events. 6334/11687 cut-off events. For 238236/238236 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 94210 event pairs, 2178 based on Foata normal form. 22/11709 useless extension candidates. Maximal degree in co-relation 103242. Up to 7668 conditions per place. [2022-11-25 17:24:13,481 INFO L137 encePairwiseOnDemand]: 525/537 looper letters, 571 selfloop transitions, 152 changer transitions 31/754 dead transitions. [2022-11-25 17:24:13,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 754 transitions, 18025 flow [2022-11-25 17:24:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:24:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:24:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2324 transitions. [2022-11-25 17:24:13,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.393431521923142 [2022-11-25 17:24:13,485 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2324 transitions. [2022-11-25 17:24:13,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2324 transitions. [2022-11-25 17:24:13,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:13,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2324 transitions. [2022-11-25 17:24:13,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 211.27272727272728) internal successors, (2324), 11 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:13,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:13,494 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:13,494 INFO L175 Difference]: Start difference. First operand has 316 places, 728 transitions, 16349 flow. Second operand 11 states and 2324 transitions. [2022-11-25 17:24:13,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 754 transitions, 18025 flow [2022-11-25 17:24:17,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 754 transitions, 17491 flow, removed 140 selfloop flow, removed 16 redundant places. [2022-11-25 17:24:17,482 INFO L231 Difference]: Finished difference. Result has 308 places, 709 transitions, 15571 flow [2022-11-25 17:24:17,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=15755, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15571, PETRI_PLACES=308, PETRI_TRANSITIONS=709} [2022-11-25 17:24:17,483 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 283 predicate places. [2022-11-25 17:24:17,484 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 709 transitions, 15571 flow [2022-11-25 17:24:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:17,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:17,484 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] [2022-11-25 17:24:17,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:17,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 17:24:17,690 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:24:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1497762312, now seen corresponding path program 9 times [2022-11-25 17:24:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:17,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098397613] [2022-11-25 17:24:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:18,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098397613] [2022-11-25 17:24:18,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098397613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004904471] [2022-11-25 17:24:18,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:24:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:18,488 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:24:18,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:24:18,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:24:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:19,158 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:19,159 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 39 treesize of output 19 [2022-11-25 17:24:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:24:19,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004904471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:19,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:24:19,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 17:24:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518690319] [2022-11-25 17:24:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:24:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:24:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:24:20,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:24:20,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 709 transitions, 15571 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:20,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:20,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:24:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:24,468 INFO L130 PetriNetUnfolder]: 6286/11691 cut-off events. [2022-11-25 17:24:24,468 INFO L131 PetriNetUnfolder]: For 219638/219638 co-relation queries the response was YES. [2022-11-25 17:24:24,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100188 conditions, 11691 events. 6286/11691 cut-off events. For 219638/219638 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 95271 event pairs, 2096 based on Foata normal form. 26/11717 useless extension candidates. Maximal degree in co-relation 99925. Up to 7668 conditions per place. [2022-11-25 17:24:24,621 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 581 selfloop transitions, 148 changer transitions 27/756 dead transitions. [2022-11-25 17:24:24,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 756 transitions, 17489 flow [2022-11-25 17:24:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:24:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:24:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2543 transitions. [2022-11-25 17:24:24,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3946306641837368 [2022-11-25 17:24:24,625 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2543 transitions. [2022-11-25 17:24:24,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2543 transitions. [2022-11-25 17:24:24,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:24,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2543 transitions. [2022-11-25 17:24:24,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.91666666666666) internal successors, (2543), 12 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:24,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:24,631 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 537.0) internal successors, (6981), 13 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:24,631 INFO L175 Difference]: Start difference. First operand has 308 places, 709 transitions, 15571 flow. Second operand 12 states and 2543 transitions. [2022-11-25 17:24:24,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 756 transitions, 17489 flow [2022-11-25 17:24:27,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 756 transitions, 16936 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-11-25 17:24:27,583 INFO L231 Difference]: Finished difference. Result has 304 places, 693 transitions, 15069 flow [2022-11-25 17:24:27,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14956, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15069, PETRI_PLACES=304, PETRI_TRANSITIONS=693} [2022-11-25 17:24:27,584 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 279 predicate places. [2022-11-25 17:24:27,585 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 693 transitions, 15069 flow [2022-11-25 17:24:27,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:27,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:27,585 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] [2022-11-25 17:24:27,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:24:27,796 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:24:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2064398864, now seen corresponding path program 10 times [2022-11-25 17:24:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:27,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843555148] [2022-11-25 17:24:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843555148] [2022-11-25 17:24:28,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843555148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76720356] [2022-11-25 17:24:28,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:24:28,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:28,606 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:28,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:24:28,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:24:28,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 17:24:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:28,872 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 [2022-11-25 17:24:28,910 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 [2022-11-25 17:24:28,942 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 [2022-11-25 17:24:29,326 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:29,326 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 39 treesize of output 19 [2022-11-25 17:24:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:24:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76720356] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:30,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:24:30,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 12] total 30 [2022-11-25 17:24:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206112284] [2022-11-25 17:24:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:24:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:24:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:24:31,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 537 [2022-11-25 17:24:31,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 693 transitions, 15069 flow. Second operand has 9 states, 9 states have (on average 211.22222222222223) internal successors, (1901), 9 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:31,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:31,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 537 [2022-11-25 17:24:31,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:37,332 INFO L130 PetriNetUnfolder]: 6399/11982 cut-off events. [2022-11-25 17:24:37,332 INFO L131 PetriNetUnfolder]: For 227813/227813 co-relation queries the response was YES. [2022-11-25 17:24:37,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102019 conditions, 11982 events. 6399/11982 cut-off events. For 227813/227813 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 99026 event pairs, 2028 based on Foata normal form. 5/11987 useless extension candidates. Maximal degree in co-relation 101295. Up to 9122 conditions per place. [2022-11-25 17:24:37,464 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 689 selfloop transitions, 79 changer transitions 45/813 dead transitions. [2022-11-25 17:24:37,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 813 transitions, 18492 flow [2022-11-25 17:24:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:24:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:24:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2167 transitions. [2022-11-25 17:24:37,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035381750465549 [2022-11-25 17:24:37,468 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2167 transitions. [2022-11-25 17:24:37,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2167 transitions. [2022-11-25 17:24:37,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:37,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2167 transitions. [2022-11-25 17:24:37,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 216.7) internal successors, (2167), 10 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:37,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:37,477 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 537.0) internal successors, (5907), 11 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:37,477 INFO L175 Difference]: Start difference. First operand has 304 places, 693 transitions, 15069 flow. Second operand 10 states and 2167 transitions. [2022-11-25 17:24:37,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 813 transitions, 18492 flow [2022-11-25 17:24:40,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 813 transitions, 17897 flow, removed 24 selfloop flow, removed 12 redundant places. [2022-11-25 17:24:40,616 INFO L231 Difference]: Finished difference. Result has 302 places, 698 transitions, 14825 flow [2022-11-25 17:24:40,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14509, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14825, PETRI_PLACES=302, PETRI_TRANSITIONS=698} [2022-11-25 17:24:40,618 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 277 predicate places. [2022-11-25 17:24:40,618 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 698 transitions, 14825 flow [2022-11-25 17:24:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 211.22222222222223) internal successors, (1901), 9 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:40,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:40,618 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] [2022-11-25 17:24:40,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:40,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:40,824 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:24:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:40,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1513223108, now seen corresponding path program 11 times [2022-11-25 17:24:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363197608] [2022-11-25 17:24:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:42,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363197608] [2022-11-25 17:24:42,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363197608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392780688] [2022-11-25 17:24:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:24:42,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:42,005 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:42,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:24:42,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:24:42,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:24:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:42,227 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 17:24:42,227 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 2 case distinctions, treesize of input 12 treesize of output 23 [2022-11-25 17:24:42,334 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:42,334 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 [2022-11-25 17:24:42,397 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 11 treesize of output 7 [2022-11-25 17:24:42,446 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 [2022-11-25 17:24:42,502 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 [2022-11-25 17:24:42,732 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:24:42,732 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 40 treesize of output 20 [2022-11-25 17:24:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:47,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:47,966 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:24:47,979 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:24:47,980 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 278 treesize of output 253 [2022-11-25 17:24:47,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:47,993 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 246 treesize of output 222 [2022-11-25 17:24:48,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:48,008 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 214 treesize of output 206 [2022-11-25 17:24:48,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:48,488 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 17:24:48,506 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:24:48,506 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 566 treesize of output 509 [2022-11-25 17:24:48,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:48,523 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 502 treesize of output 446 [2022-11-25 17:24:48,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:24:48,540 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 438 treesize of output 414 [2022-11-25 17:24:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392780688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:49,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:24:49,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-11-25 17:24:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273052911] [2022-11-25 17:24:49,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:49,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:24:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:24:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=986, Unknown=23, NotChecked=0, Total=1190 [2022-11-25 17:24:52,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:24:53,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:24:55,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:24:57,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:24:59,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:02,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:03,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:05,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:08,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:10,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:12,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:14,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:16,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:18,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:20,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:22,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:25,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:27,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:29,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:31,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:33,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:35,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:37,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:39,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:41,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:43,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:45,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:47,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:49,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:51,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:53,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:55,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:25:58,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:00,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:02,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:04,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:06,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:08,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:26:08,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 537 [2022-11-25 17:26:08,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 698 transitions, 14825 flow. Second operand has 35 states, 35 states have (on average 153.5142857142857) internal successors, (5373), 35 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:08,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:08,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 537 [2022-11-25 17:26:08,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:16,823 INFO L130 PetriNetUnfolder]: 6607/12406 cut-off events. [2022-11-25 17:26:16,823 INFO L131 PetriNetUnfolder]: For 239051/239051 co-relation queries the response was YES. [2022-11-25 17:26:16,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105828 conditions, 12406 events. 6607/12406 cut-off events. For 239051/239051 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 103554 event pairs, 2070 based on Foata normal form. 30/12436 useless extension candidates. Maximal degree in co-relation 105281. Up to 7877 conditions per place. [2022-11-25 17:26:17,091 INFO L137 encePairwiseOnDemand]: 522/537 looper letters, 527 selfloop transitions, 224 changer transitions 70/821 dead transitions. [2022-11-25 17:26:17,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 821 transitions, 17952 flow [2022-11-25 17:26:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:26:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:26:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3924 transitions. [2022-11-25 17:26:17,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2922905027932961 [2022-11-25 17:26:17,096 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3924 transitions. [2022-11-25 17:26:17,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3924 transitions. [2022-11-25 17:26:17,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:17,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3924 transitions. [2022-11-25 17:26:17,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 156.96) internal successors, (3924), 25 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:17,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 537.0) internal successors, (13962), 26 states have internal predecessors, (13962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:17,107 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 537.0) internal successors, (13962), 26 states have internal predecessors, (13962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:17,107 INFO L175 Difference]: Start difference. First operand has 302 places, 698 transitions, 14825 flow. Second operand 25 states and 3924 transitions. [2022-11-25 17:26:17,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 821 transitions, 17952 flow [2022-11-25 17:26:20,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 821 transitions, 17851 flow, removed 22 selfloop flow, removed 3 redundant places. [2022-11-25 17:26:20,369 INFO L231 Difference]: Finished difference. Result has 327 places, 704 transitions, 15362 flow [2022-11-25 17:26:20,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14751, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15362, PETRI_PLACES=327, PETRI_TRANSITIONS=704} [2022-11-25 17:26:20,370 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2022-11-25 17:26:20,370 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 704 transitions, 15362 flow [2022-11-25 17:26:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 153.5142857142857) internal successors, (5373), 35 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:20,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:20,371 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] [2022-11-25 17:26:20,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 17:26:20,576 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -643979176, now seen corresponding path program 12 times [2022-11-25 17:26:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739516326] [2022-11-25 17:26:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739516326] [2022-11-25 17:26:21,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739516326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679770458] [2022-11-25 17:26:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:26:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:21,292 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:21,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:26:21,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-25 17:26:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:26:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:22,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:26:22,072 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 39 treesize of output 19 [2022-11-25 17:26:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:26:22,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:22,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679770458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:22,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:26:22,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 17:26:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388790572] [2022-11-25 17:26:22,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:22,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:26:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:22,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:26:22,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:26:22,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:26:22,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 704 transitions, 15362 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:22,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:22,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:26:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:27,641 INFO L130 PetriNetUnfolder]: 6460/12008 cut-off events. [2022-11-25 17:26:27,641 INFO L131 PetriNetUnfolder]: For 250406/250406 co-relation queries the response was YES. [2022-11-25 17:26:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106086 conditions, 12008 events. 6460/12008 cut-off events. For 250406/250406 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 98277 event pairs, 1669 based on Foata normal form. 45/12053 useless extension candidates. Maximal degree in co-relation 105071. Up to 8395 conditions per place. [2022-11-25 17:26:27,792 INFO L137 encePairwiseOnDemand]: 526/537 looper letters, 450 selfloop transitions, 291 changer transitions 12/753 dead transitions. [2022-11-25 17:26:27,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 753 transitions, 17300 flow [2022-11-25 17:26:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:26:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:26:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2324 transitions. [2022-11-25 17:26:27,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.393431521923142 [2022-11-25 17:26:27,796 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2324 transitions. [2022-11-25 17:26:27,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2324 transitions. [2022-11-25 17:26:27,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:27,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2324 transitions. [2022-11-25 17:26:27,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 211.27272727272728) internal successors, (2324), 11 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:27,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:27,801 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 537.0) internal successors, (6444), 12 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:27,801 INFO L175 Difference]: Start difference. First operand has 327 places, 704 transitions, 15362 flow. Second operand 11 states and 2324 transitions. [2022-11-25 17:26:27,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 753 transitions, 17300 flow [2022-11-25 17:26:31,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 753 transitions, 16889 flow, removed 88 selfloop flow, removed 18 redundant places. [2022-11-25 17:26:31,361 INFO L231 Difference]: Finished difference. Result has 306 places, 705 transitions, 15607 flow [2022-11-25 17:26:31,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14926, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15607, PETRI_PLACES=306, PETRI_TRANSITIONS=705} [2022-11-25 17:26:31,362 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2022-11-25 17:26:31,363 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 705 transitions, 15607 flow [2022-11-25 17:26:31,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:31,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:31,363 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] [2022-11-25 17:26:31,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:31,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:26:31,564 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash 782425586, now seen corresponding path program 13 times [2022-11-25 17:26:31,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:31,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613537743] [2022-11-25 17:26:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:31,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:32,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:32,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613537743] [2022-11-25 17:26:32,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613537743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:32,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541215837] [2022-11-25 17:26:32,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:26:32,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:32,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:32,268 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:32,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 17:26:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:26:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:32,851 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:26:32,851 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 39 treesize of output 19 [2022-11-25 17:26:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:32,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:33,369 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-11-25 17:26:33,369 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 233 treesize of output 234 [2022-11-25 17:26:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:33,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541215837] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:33,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:26:33,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 28 [2022-11-25 17:26:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625576029] [2022-11-25 17:26:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:33,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:26:33,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:26:33,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:26:34,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 537 [2022-11-25 17:26:34,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 705 transitions, 15607 flow. Second operand has 13 states, 13 states have (on average 199.53846153846155) internal successors, (2594), 13 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:34,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:34,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 537 [2022-11-25 17:26:34,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:40,254 INFO L130 PetriNetUnfolder]: 6607/12183 cut-off events. [2022-11-25 17:26:40,257 INFO L131 PetriNetUnfolder]: For 248242/248242 co-relation queries the response was YES. [2022-11-25 17:26:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108608 conditions, 12183 events. 6607/12183 cut-off events. For 248242/248242 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 99009 event pairs, 801 based on Foata normal form. 5/12188 useless extension candidates. Maximal degree in co-relation 107884. Up to 4283 conditions per place. [2022-11-25 17:26:40,413 INFO L137 encePairwiseOnDemand]: 523/537 looper letters, 567 selfloop transitions, 309 changer transitions 44/920 dead transitions. [2022-11-25 17:26:40,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 920 transitions, 21355 flow [2022-11-25 17:26:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:26:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:26:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3854 transitions. [2022-11-25 17:26:40,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3777320395961972 [2022-11-25 17:26:40,420 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3854 transitions. [2022-11-25 17:26:40,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3854 transitions. [2022-11-25 17:26:40,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:40,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3854 transitions. [2022-11-25 17:26:40,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 202.8421052631579) internal successors, (3854), 19 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:40,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 537.0) internal successors, (10740), 20 states have internal predecessors, (10740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:40,436 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 537.0) internal successors, (10740), 20 states have internal predecessors, (10740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:40,436 INFO L175 Difference]: Start difference. First operand has 306 places, 705 transitions, 15607 flow. Second operand 19 states and 3854 transitions. [2022-11-25 17:26:40,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 920 transitions, 21355 flow [2022-11-25 17:26:43,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 920 transitions, 20617 flow, removed 71 selfloop flow, removed 9 redundant places. [2022-11-25 17:26:43,895 INFO L231 Difference]: Finished difference. Result has 320 places, 718 transitions, 16079 flow [2022-11-25 17:26:43,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=14961, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16079, PETRI_PLACES=320, PETRI_TRANSITIONS=718} [2022-11-25 17:26:43,896 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2022-11-25 17:26:43,896 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 718 transitions, 16079 flow [2022-11-25 17:26:43,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.53846153846155) internal successors, (2594), 13 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:43,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:43,897 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] [2022-11-25 17:26:43,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:44,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:26:44,098 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1696678280, now seen corresponding path program 14 times [2022-11-25 17:26:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540505825] [2022-11-25 17:26:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540505825] [2022-11-25 17:26:44,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540505825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653987778] [2022-11-25 17:26:44,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:26:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:44,769 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:44,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 17:26:45,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:26:45,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:26:45,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:45,416 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:26:45,417 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 39 treesize of output 19 [2022-11-25 17:26:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:26:45,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:45,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653987778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:45,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:26:45,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2022-11-25 17:26:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021704525] [2022-11-25 17:26:45,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:45,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:26:45,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:45,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:26:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:26:46,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 537 [2022-11-25 17:26:46,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 718 transitions, 16079 flow. Second operand has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:46,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:46,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 537 [2022-11-25 17:26:46,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:51,529 INFO L130 PetriNetUnfolder]: 6582/12128 cut-off events. [2022-11-25 17:26:51,530 INFO L131 PetriNetUnfolder]: For 276530/276530 co-relation queries the response was YES. [2022-11-25 17:26:51,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110382 conditions, 12128 events. 6582/12128 cut-off events. For 276530/276530 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 98459 event pairs, 1706 based on Foata normal form. 5/12133 useless extension candidates. Maximal degree in co-relation 109797. Up to 8620 conditions per place. [2022-11-25 17:26:51,702 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 478 selfloop transitions, 265 changer transitions 21/764 dead transitions. [2022-11-25 17:26:51,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 764 transitions, 18045 flow [2022-11-25 17:26:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:26:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:26:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2022-11-25 17:26:51,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39457893647837783 [2022-11-25 17:26:51,707 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2022-11-25 17:26:51,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2022-11-25 17:26:51,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:51,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2022-11-25 17:26:51,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.88888888888889) internal successors, (1907), 9 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:51,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:51,718 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 537.0) internal successors, (5370), 10 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:51,718 INFO L175 Difference]: Start difference. First operand has 320 places, 718 transitions, 16079 flow. Second operand 9 states and 1907 transitions. [2022-11-25 17:26:51,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 764 transitions, 18045 flow [2022-11-25 17:26:56,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 764 transitions, 17436 flow, removed 79 selfloop flow, removed 14 redundant places. [2022-11-25 17:26:56,275 INFO L231 Difference]: Finished difference. Result has 309 places, 711 transitions, 15907 flow [2022-11-25 17:26:56,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=15487, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15907, PETRI_PLACES=309, PETRI_TRANSITIONS=711} [2022-11-25 17:26:56,276 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 284 predicate places. [2022-11-25 17:26:56,276 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 711 transitions, 15907 flow [2022-11-25 17:26:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:56,277 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] [2022-11-25 17:26:56,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:56,477 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:26:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 711529634, now seen corresponding path program 15 times [2022-11-25 17:26:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815653351] [2022-11-25 17:26:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815653351] [2022-11-25 17:26:57,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815653351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493147566] [2022-11-25 17:26:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:57,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:57,092 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:57,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6886cdac-ad87-4590-a8d6-374f8af12099/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 17:26:57,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:26:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:26:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:57,671 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:26:57,672 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 39 treesize of output 19 [2022-11-25 17:26:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:26:57,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493147566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:57,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:26:57,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-11-25 17:26:57,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423924629] [2022-11-25 17:26:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:26:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:26:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:26:58,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 537 [2022-11-25 17:26:58,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 711 transitions, 15907 flow. Second operand has 12 states, 12 states have (on average 205.66666666666666) internal successors, (2468), 12 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:58,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 537 [2022-11-25 17:26:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand