./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:13,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:13,910 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:17:13,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:13,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:13,954 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:13,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:13,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:13,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:13,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:13,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:13,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:13,964 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:13,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:13,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:17:13,967 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:13,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:13,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:13,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:13,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:17:13,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:13,969 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:17:13,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:13,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:17:13,970 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:13,971 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:13,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:13,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:13,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:13,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:13,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:13,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:17:13,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:13,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:13,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:13,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:17:13,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:13,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:13,983 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:13,983 INFO L153 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_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2023-11-12 02:17:14,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:14,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:14,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:14,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:14,313 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:14,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-12 02:17:17,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:17,761 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:17,762 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2023-11-12 02:17:17,773 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/data/350c7881f/a9c6b3ca7bc94e08bc74634f6f28f3fd/FLAGc7a414473 [2023-11-12 02:17:17,790 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/data/350c7881f/a9c6b3ca7bc94e08bc74634f6f28f3fd [2023-11-12 02:17:17,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:17,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:17,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:17,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:17,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:17,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:17" (1/1) ... [2023-11-12 02:17:17,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:17, skipping insertion in model container [2023-11-12 02:17:17,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:17" (1/1) ... [2023-11-12 02:17:17,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:18,125 WARN L240 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_9e472efb-d248-442a-ae50-c51e4fed6f61/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[4035,4048] [2023-11-12 02:17:18,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:18,170 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:18,209 WARN L240 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_9e472efb-d248-442a-ae50-c51e4fed6f61/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[4035,4048] [2023-11-12 02:17:18,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:18,238 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:18,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18 WrapperNode [2023-11-12 02:17:18,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:18,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:18,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:18,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:18,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,309 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 439 [2023-11-12 02:17:18,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:18,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:18,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:18,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:18,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,357 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:18,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:18,374 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:18,375 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:18,375 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (1/1) ... [2023-11-12 02:17:18,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:18,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:18,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:17:18,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:17:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:17:18,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:17:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:17:18,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:17:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:17:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:18,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:18,474 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:17:18,617 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:18,620 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:19,388 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:19,401 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:19,402 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:17:19,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:19 BoogieIcfgContainer [2023-11-12 02:17:19,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:19,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:19,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:19,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:19,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:17" (1/3) ... [2023-11-12 02:17:19,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b453ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:19, skipping insertion in model container [2023-11-12 02:17:19,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:18" (2/3) ... [2023-11-12 02:17:19,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b453ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:19, skipping insertion in model container [2023-11-12 02:17:19,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:19" (3/3) ... [2023-11-12 02:17:19,416 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2023-11-12 02:17:19,425 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:17:19,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:19,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:17:19,463 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:17:19,691 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:17:19,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 536 places, 567 transitions, 1155 flow [2023-11-12 02:17:20,045 INFO L124 PetriNetUnfolderBase]: 41/564 cut-off events. [2023-11-12 02:17:20,047 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:17:20,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 564 events. 41/564 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 481. Up to 2 conditions per place. [2023-11-12 02:17:20,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 567 transitions, 1155 flow [2023-11-12 02:17:20,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 522 places, 553 transitions, 1124 flow [2023-11-12 02:17:20,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:17:20,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 522 places, 553 transitions, 1124 flow [2023-11-12 02:17:20,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 522 places, 553 transitions, 1124 flow [2023-11-12 02:17:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 522 places, 553 transitions, 1124 flow [2023-11-12 02:17:20,268 INFO L124 PetriNetUnfolderBase]: 41/553 cut-off events. [2023-11-12 02:17:20,268 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:17:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 553 events. 41/553 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 481. Up to 2 conditions per place. [2023-11-12 02:17:20,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 22110 [2023-11-12 02:17:44,089 INFO L134 LiptonReduction]: Checked pairs total: 25175 [2023-11-12 02:17:44,089 INFO L136 LiptonReduction]: Total number of compositions: 645 [2023-11-12 02:17:44,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:44,112 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=LoopHeads, 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;@396c85c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:44,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:17:44,122 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:17:44,123 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2023-11-12 02:17:44,123 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:17:44,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:44,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:44,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:44,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash -520324327, now seen corresponding path program 1 times [2023-11-12 02:17:44,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88627825] [2023-11-12 02:17:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88627825] [2023-11-12 02:17:44,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88627825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:44,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:44,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282439129] [2023-11-12 02:17:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:17:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:17:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:17:44,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1212 [2023-11-12 02:17:44,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 543.5) internal successors, (1087), 2 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:44,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1212 [2023-11-12 02:17:44,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:44,962 INFO L124 PetriNetUnfolderBase]: 699/1048 cut-off events. [2023-11-12 02:17:44,962 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-12 02:17:44,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 1048 events. 699/1048 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3721 event pairs, 557 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2016. Up to 1049 conditions per place. [2023-11-12 02:17:44,972 INFO L140 encePairwiseOnDemand]: 1211/1212 looper letters, 41 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2023-11-12 02:17:44,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 182 flow [2023-11-12 02:17:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:17:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:17:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1104 transitions. [2023-11-12 02:17:45,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45544554455445546 [2023-11-12 02:17:45,006 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1104 transitions. [2023-11-12 02:17:45,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1104 transitions. [2023-11-12 02:17:45,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:45,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1104 transitions. [2023-11-12 02:17:45,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 552.0) internal successors, (1104), 2 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1212.0) internal successors, (3636), 3 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,042 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1212.0) internal successors, (3636), 3 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,044 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 102 flow. Second operand 2 states and 1104 transitions. [2023-11-12 02:17:45,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 182 flow [2023-11-12 02:17:45,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:17:45,058 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 88 flow [2023-11-12 02:17:45,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2023-11-12 02:17:45,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-11-12 02:17:45,066 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 88 flow [2023-11-12 02:17:45,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 543.5) internal successors, (1087), 2 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:45,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:45,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:45,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1236281337, now seen corresponding path program 1 times [2023-11-12 02:17:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:45,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782787461] [2023-11-12 02:17:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:45,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:45,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782787461] [2023-11-12 02:17:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782787461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:45,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668656264] [2023-11-12 02:17:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:45,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:45,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1212 [2023-11-12 02:17:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 533.3333333333334) internal successors, (1600), 3 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:45,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1212 [2023-11-12 02:17:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:45,724 INFO L124 PetriNetUnfolderBase]: 789/1184 cut-off events. [2023-11-12 02:17:45,725 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-12 02:17:45,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 1184 events. 789/1184 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4442 event pairs, 473 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 2432. Up to 867 conditions per place. [2023-11-12 02:17:45,733 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 52 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-11-12 02:17:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 228 flow [2023-11-12 02:17:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1628 transitions. [2023-11-12 02:17:45,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44774477447744776 [2023-11-12 02:17:45,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1628 transitions. [2023-11-12 02:17:45,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1628 transitions. [2023-11-12 02:17:45,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:45,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1628 transitions. [2023-11-12 02:17:45,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,768 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 88 flow. Second operand 3 states and 1628 transitions. [2023-11-12 02:17:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 228 flow [2023-11-12 02:17:45,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:17:45,771 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 106 flow [2023-11-12 02:17:45,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-11-12 02:17:45,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-12 02:17:45,775 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 106 flow [2023-11-12 02:17:45,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 533.3333333333334) internal successors, (1600), 3 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:45,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:45,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:17:45,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:45,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1990745682, now seen corresponding path program 1 times [2023-11-12 02:17:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:45,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098364293] [2023-11-12 02:17:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:46,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:46,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098364293] [2023-11-12 02:17:46,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098364293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:46,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126625164] [2023-11-12 02:17:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:46,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:46,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:46,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:46,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:46,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:46,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:46,700 INFO L124 PetriNetUnfolderBase]: 789/1185 cut-off events. [2023-11-12 02:17:46,701 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-12 02:17:46,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1185 events. 789/1185 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 2802. Up to 1185 conditions per place. [2023-11-12 02:17:46,711 INFO L140 encePairwiseOnDemand]: 1209/1212 looper letters, 41 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-12 02:17:46,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 194 flow [2023-11-12 02:17:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1576 transitions. [2023-11-12 02:17:46,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43344334433443343 [2023-11-12 02:17:46,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1576 transitions. [2023-11-12 02:17:46,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1576 transitions. [2023-11-12 02:17:46,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:46,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1576 transitions. [2023-11-12 02:17:46,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 525.3333333333334) internal successors, (1576), 3 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1212.0) internal successors, (4848), 4 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,742 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 106 flow. Second operand 3 states and 1576 transitions. [2023-11-12 02:17:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 194 flow [2023-11-12 02:17:46,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:46,751 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 112 flow [2023-11-12 02:17:46,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-11-12 02:17:46,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2023-11-12 02:17:46,757 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 112 flow [2023-11-12 02:17:46,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 520.6666666666666) internal successors, (1562), 3 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:46,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:46,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:17:46,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:46,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1432284726, now seen corresponding path program 1 times [2023-11-12 02:17:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:46,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469289280] [2023-11-12 02:17:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:46,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:46,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469289280] [2023-11-12 02:17:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469289280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:46,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:46,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669921826] [2023-11-12 02:17:46,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:47,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 518.5) internal successors, (2074), 4 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:47,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:47,524 INFO L124 PetriNetUnfolderBase]: 789/1186 cut-off events. [2023-11-12 02:17:47,525 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-12 02:17:47,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1186 events. 789/1186 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 2671. Up to 1184 conditions per place. [2023-11-12 02:17:47,534 INFO L140 encePairwiseOnDemand]: 1207/1212 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-12 02:17:47,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 202 flow [2023-11-12 02:17:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2088 transitions. [2023-11-12 02:17:47,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306930693069307 [2023-11-12 02:17:47,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2088 transitions. [2023-11-12 02:17:47,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2088 transitions. [2023-11-12 02:17:47,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:47,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2088 transitions. [2023-11-12 02:17:47,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 522.0) internal successors, (2088), 4 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,571 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 112 flow. Second operand 4 states and 2088 transitions. [2023-11-12 02:17:47,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 202 flow [2023-11-12 02:17:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:47,575 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 126 flow [2023-11-12 02:17:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-12 02:17:47,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-11-12 02:17:47,577 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 126 flow [2023-11-12 02:17:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 518.5) internal successors, (2074), 4 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:47,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:47,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:17:47,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:47,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1053063921, now seen corresponding path program 1 times [2023-11-12 02:17:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987582] [2023-11-12 02:17:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:17:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987582] [2023-11-12 02:17:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071939081] [2023-11-12 02:17:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:47,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:47,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 518.75) internal successors, (2075), 4 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:47,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:47,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:47,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:48,287 INFO L124 PetriNetUnfolderBase]: 789/1187 cut-off events. [2023-11-12 02:17:48,287 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-12 02:17:48,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1187 events. 789/1187 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1086 useless extension candidates. Maximal degree in co-relation 2679. Up to 1186 conditions per place. [2023-11-12 02:17:48,297 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 42 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-11-12 02:17:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 218 flow [2023-11-12 02:17:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-12 02:17:48,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-12 02:17:48,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-12 02:17:48,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-12 02:17:48,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:48,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-12 02:17:48,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:48,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:48,331 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:48,331 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 126 flow. Second operand 4 states and 2087 transitions. [2023-11-12 02:17:48,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 218 flow [2023-11-12 02:17:48,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:48,335 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 139 flow [2023-11-12 02:17:48,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-12 02:17:48,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-11-12 02:17:48,336 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 139 flow [2023-11-12 02:17:48,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 518.75) internal successors, (2075), 4 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:48,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:48,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:17:48,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:48,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash -643470102, now seen corresponding path program 1 times [2023-11-12 02:17:48,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:48,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60230176] [2023-11-12 02:17:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:17:48,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:48,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60230176] [2023-11-12 02:17:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60230176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:48,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807415707] [2023-11-12 02:17:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:48,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:48,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:48,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:17:48,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:48,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807415707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:48,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:48,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 02:17:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696811628] [2023-11-12 02:17:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:17:49,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:49,341 INFO L124 PetriNetUnfolderBase]: 789/1188 cut-off events. [2023-11-12 02:17:49,342 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-12 02:17:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1188 events. 789/1188 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4315 event pairs, 641 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 2687. Up to 1187 conditions per place. [2023-11-12 02:17:49,352 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 43 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-11-12 02:17:49,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 233 flow [2023-11-12 02:17:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-12 02:17:49,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-12 02:17:49,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-12 02:17:49,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-12 02:17:49,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:49,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-12 02:17:49,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,383 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,384 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 139 flow. Second operand 4 states and 2087 transitions. [2023-11-12 02:17:49,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 233 flow [2023-11-12 02:17:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:49,387 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 147 flow [2023-11-12 02:17:49,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-12 02:17:49,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-12 02:17:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 147 flow [2023-11-12 02:17:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.0) internal successors, (2076), 4 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:49,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:17:49,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:49,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1440074201, now seen corresponding path program 1 times [2023-11-12 02:17:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902464711] [2023-11-12 02:17:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:17:49,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:49,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902464711] [2023-11-12 02:17:49,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902464711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:17:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132945767] [2023-11-12 02:17:49,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:49,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:49,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:49,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:49,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:49,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:50,313 INFO L124 PetriNetUnfolderBase]: 789/1189 cut-off events. [2023-11-12 02:17:50,313 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-12 02:17:50,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 1189 events. 789/1189 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4320 event pairs, 641 based on Foata normal form. 0/1090 useless extension candidates. Maximal degree in co-relation 2692. Up to 1188 conditions per place. [2023-11-12 02:17:50,322 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 44 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-11-12 02:17:50,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 243 flow [2023-11-12 02:17:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-12 02:17:50,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-12 02:17:50,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-12 02:17:50,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-12 02:17:50,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:50,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-12 02:17:50,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:50,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:50,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:50,351 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 147 flow. Second operand 4 states and 2087 transitions. [2023-11-12 02:17:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 243 flow [2023-11-12 02:17:50,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 237 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:50,357 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 155 flow [2023-11-12 02:17:50,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-11-12 02:17:50,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-11-12 02:17:50,359 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 155 flow [2023-11-12 02:17:50,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.25) internal successors, (2077), 4 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:50,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:50,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:50,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:17:50,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:50,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 405858536, now seen corresponding path program 1 times [2023-11-12 02:17:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332918904] [2023-11-12 02:17:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:17:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332918904] [2023-11-12 02:17:50,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332918904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035557320] [2023-11-12 02:17:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:50,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:50,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:17:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:51,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:17:51,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:17:51,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:51,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035557320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:51,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:51,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 02:17:51,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078331973] [2023-11-12 02:17:51,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:51,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:51,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:51,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:51,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:17:51,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 511 out of 1212 [2023-11-12 02:17:51,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 519.5) internal successors, (2078), 4 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 511 of 1212 [2023-11-12 02:17:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:51,560 INFO L124 PetriNetUnfolderBase]: 789/1190 cut-off events. [2023-11-12 02:17:51,560 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-12 02:17:51,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 1190 events. 789/1190 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4320 event pairs, 641 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 2697. Up to 1189 conditions per place. [2023-11-12 02:17:51,570 INFO L140 encePairwiseOnDemand]: 1208/1212 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-11-12 02:17:51,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 253 flow [2023-11-12 02:17:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2087 transitions. [2023-11-12 02:17:51,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430486798679868 [2023-11-12 02:17:51,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2087 transitions. [2023-11-12 02:17:51,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2087 transitions. [2023-11-12 02:17:51,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:51,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2087 transitions. [2023-11-12 02:17:51,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 521.75) internal successors, (2087), 4 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:51,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:51,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1212.0) internal successors, (6060), 5 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:51,598 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 155 flow. Second operand 4 states and 2087 transitions. [2023-11-12 02:17:51,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 253 flow [2023-11-12 02:17:51,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 247 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:51,602 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 163 flow [2023-11-12 02:17:51,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-12 02:17:51,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-11-12 02:17:51,604 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 163 flow [2023-11-12 02:17:51,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 519.5) internal successors, (2078), 4 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:51,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:51,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:51,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:51,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9e472efb-d248-442a-ae50-c51e4fed6f61/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:51,816 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:17:51,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:51,817 INFO L85 PathProgramCache]: Analyzing trace with hash -345881631, now seen corresponding path program 1 times [2023-11-12 02:17:51,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:51,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630984497] [2023-11-12 02:17:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:51,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:54,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:54,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630984497] [2023-11-12 02:17:54,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630984497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:54,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-12 02:17:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555226410] [2023-11-12 02:17:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:54,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:17:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:17:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:17:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 465 out of 1212 [2023-11-12 02:17:58,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 163 flow. Second operand has 14 states, 14 states have (on average 467.5) internal successors, (6545), 14 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:58,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:58,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 465 of 1212 [2023-11-12 02:17:58,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:01,904 INFO L124 PetriNetUnfolderBase]: 3270/5074 cut-off events. [2023-11-12 02:18:01,905 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2023-11-12 02:18:01,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11680 conditions, 5074 events. 3270/5074 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28472 event pairs, 328 based on Foata normal form. 2/4644 useless extension candidates. Maximal degree in co-relation 11669. Up to 995 conditions per place. [2023-11-12 02:18:01,956 INFO L140 encePairwiseOnDemand]: 1196/1212 looper letters, 251 selfloop transitions, 76 changer transitions 14/341 dead transitions. [2023-11-12 02:18:01,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 341 transitions, 1615 flow [2023-11-12 02:18:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:18:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-12 02:18:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 12417 transitions. [2023-11-12 02:18:02,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39404036557501904 [2023-11-12 02:18:02,005 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 12417 transitions. [2023-11-12 02:18:02,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 12417 transitions. [2023-11-12 02:18:02,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:02,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 12417 transitions. [2023-11-12 02:18:02,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 477.5769230769231) internal successors, (12417), 26 states have internal predecessors, (12417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 1212.0) internal successors, (32724), 27 states have internal predecessors, (32724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,111 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 1212.0) internal successors, (32724), 27 states have internal predecessors, (32724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,111 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 163 flow. Second operand 26 states and 12417 transitions. [2023-11-12 02:18:02,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 341 transitions, 1615 flow [2023-11-12 02:18:02,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 341 transitions, 1609 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:18:02,150 INFO L231 Difference]: Finished difference. Result has 96 places, 140 transitions, 811 flow [2023-11-12 02:18:02,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1212, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=811, PETRI_PLACES=96, PETRI_TRANSITIONS=140} [2023-11-12 02:18:02,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2023-11-12 02:18:02,152 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 140 transitions, 811 flow [2023-11-12 02:18:02,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 467.5) internal successors, (6545), 14 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:02,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:02,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:18:02,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:18:02,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1894546445, now seen corresponding path program 2 times [2023-11-12 02:18:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:02,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191348204] [2023-11-12 02:18:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat