./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:39:52,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:39:52,926 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:39:52,931 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:39:52,932 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:39:52,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:39:52,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:39:52,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:39:52,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:39:52,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:39:52,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:39:52,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:39:52,962 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:39:52,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:39:52,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:39:52,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:39:52,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:39:52,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:39:52,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:39:52,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:39:52,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:39:52,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:39:52,968 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:39:52,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:39:52,969 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:39:52,970 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:39:52,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:39:52,971 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:39:52,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:52,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:39:52,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:39:52,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:39:52,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:39:52,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:39:52,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:39:52,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:39:52,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:39:52,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:39:52,976 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:39:52,977 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_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2023-11-06 22:39:53,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:39:53,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:39:53,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:39:53,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:39:53,243 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:39:53,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-06 22:39:56,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:39:56,662 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:39:56,662 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-06 22:39:56,672 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/data/5d91688bc/7d4274a885194ef59503bd687dd7d88e/FLAGab3159175 [2023-11-06 22:39:56,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/data/5d91688bc/7d4274a885194ef59503bd687dd7d88e [2023-11-06 22:39:56,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:39:56,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:39:56,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:56,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:39:56,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:39:56,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:56,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0ffb61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56, skipping insertion in model container [2023-11-06 22:39:56,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:56,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:39:56,916 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_a5373460-9b25-4543-82b8-9cbc0f5ac708/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2023-11-06 22:39:56,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:56,938 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:39:56,971 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_a5373460-9b25-4543-82b8-9cbc0f5ac708/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2023-11-06 22:39:56,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:56,985 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:56,985 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:56,993 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:39:56,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56 WrapperNode [2023-11-06 22:39:56,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:56,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:56,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:39:56,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:39:57,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,050 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 243 [2023-11-06 22:39:57,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:57,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:39:57,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:39:57,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:39:57,059 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,086 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:39:57,087 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:39:57,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:39:57,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:39:57,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (1/1) ... [2023-11-06 22:39:57,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:57,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:39:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:39:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:39:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:39:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:39:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:39:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:39:57,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:39:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:39:57,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:39:57,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:39:57,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:39:57,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:39:57,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:39:57,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:39:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:39:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:39:57,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:39:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:39:57,172 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:39:57,280 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:39:57,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:39:57,675 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:39:57,829 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:39:57,829 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:39:57,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:57 BoogieIcfgContainer [2023-11-06 22:39:57,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:39:57,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:39:57,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:39:57,843 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:39:57,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:56" (1/3) ... [2023-11-06 22:39:57,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d190a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:57, skipping insertion in model container [2023-11-06 22:39:57,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:56" (2/3) ... [2023-11-06 22:39:57,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d190a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:57, skipping insertion in model container [2023-11-06 22:39:57,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:57" (3/3) ... [2023-11-06 22:39:57,854 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-11-06 22:39:57,864 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:39:57,878 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:39:57,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:39:57,878 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:39:57,982 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:39:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 191 transitions, 403 flow [2023-11-06 22:39:58,147 INFO L124 PetriNetUnfolderBase]: 7/188 cut-off events. [2023-11-06 22:39:58,148 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:39:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 188 events. 7/188 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2023-11-06 22:39:58,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 191 transitions, 403 flow [2023-11-06 22:39:58,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 177 transitions, 372 flow [2023-11-06 22:39:58,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:39:58,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 177 transitions, 372 flow [2023-11-06 22:39:58,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 177 transitions, 372 flow [2023-11-06 22:39:58,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 177 transitions, 372 flow [2023-11-06 22:39:58,267 INFO L124 PetriNetUnfolderBase]: 7/177 cut-off events. [2023-11-06 22:39:58,267 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:39:58,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 7/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2023-11-06 22:39:58,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 1266 [2023-11-06 22:40:06,288 INFO L134 LiptonReduction]: Checked pairs total: 7976 [2023-11-06 22:40:06,288 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-11-06 22:40:06,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:40:06,312 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@357e776d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:40:06,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:40:06,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:40:06,322 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2023-11-06 22:40:06,322 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:40:06,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:06,323 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] [2023-11-06 22:40:06,324 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)] === [2023-11-06 22:40:06,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1878250682, now seen corresponding path program 1 times [2023-11-06 22:40:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:06,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885555707] [2023-11-06 22:40:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:06,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:06,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885555707] [2023-11-06 22:40:06,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885555707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:06,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:06,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420849715] [2023-11-06 22:40:06,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 355 [2023-11-06 22:40:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:07,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 355 [2023-11-06 22:40:07,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:07,243 INFO L124 PetriNetUnfolderBase]: 406/717 cut-off events. [2023-11-06 22:40:07,243 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 22:40:07,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 717 events. 406/717 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3325 event pairs, 405 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 1330. Up to 667 conditions per place. [2023-11-06 22:40:07,253 INFO L140 encePairwiseOnDemand]: 352/355 looper letters, 25 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-11-06 22:40:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 146 flow [2023-11-06 22:40:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-11-06 22:40:07,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47699530516431926 [2023-11-06 22:40:07,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-11-06 22:40:07,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-11-06 22:40:07,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:07,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-11-06 22:40:07,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,293 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 90 flow. Second operand 3 states and 508 transitions. [2023-11-06 22:40:07,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 146 flow [2023-11-06 22:40:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:40:07,300 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 90 flow [2023-11-06 22:40:07,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-06 22:40:07,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-11-06 22:40:07,307 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 90 flow [2023-11-06 22:40:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:07,308 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, 1] [2023-11-06 22:40:07,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:40:07,309 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)] === [2023-11-06 22:40:07,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2137796724, now seen corresponding path program 1 times [2023-11-06 22:40:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:07,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614205346] [2023-11-06 22:40:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614205346] [2023-11-06 22:40:07,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614205346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:07,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:07,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:40:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962258827] [2023-11-06 22:40:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:07,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:40:07,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:40:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:07,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:40:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:08,243 INFO L124 PetriNetUnfolderBase]: 1344/2387 cut-off events. [2023-11-06 22:40:08,243 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 22:40:08,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2387 events. 1344/2387 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13521 event pairs, 243 based on Foata normal form. 30/2414 useless extension candidates. Maximal degree in co-relation 4672. Up to 695 conditions per place. [2023-11-06 22:40:08,262 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 102 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-11-06 22:40:08,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 514 flow [2023-11-06 22:40:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1495 transitions. [2023-11-06 22:40:08,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679186228482003 [2023-11-06 22:40:08,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1495 transitions. [2023-11-06 22:40:08,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1495 transitions. [2023-11-06 22:40:08,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:08,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1495 transitions. [2023-11-06 22:40:08,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.11111111111111) internal successors, (1495), 9 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,288 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,288 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 90 flow. Second operand 9 states and 1495 transitions. [2023-11-06 22:40:08,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 514 flow [2023-11-06 22:40:08,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 124 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:08,292 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-11-06 22:40:08,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-11-06 22:40:08,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-11-06 22:40:08,294 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-11-06 22:40:08,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:08,295 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, 1] [2023-11-06 22:40:08,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:40:08,295 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)] === [2023-11-06 22:40:08,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash 827352322, now seen corresponding path program 2 times [2023-11-06 22:40:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437679350] [2023-11-06 22:40:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437679350] [2023-11-06 22:40:09,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437679350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:09,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437681964] [2023-11-06 22:40:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:09,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:09,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:40:09,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:40:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:09,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:09,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:09,611 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:09,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:09,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437681964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-06 22:40:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740481230] [2023-11-06 22:40:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:09,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:40:10,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:10,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:10,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:10,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:10,883 INFO L124 PetriNetUnfolderBase]: 1502/2595 cut-off events. [2023-11-06 22:40:10,883 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2023-11-06 22:40:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2595 events. 1502/2595 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14918 event pairs, 290 based on Foata normal form. 2/2539 useless extension candidates. Maximal degree in co-relation 5808. Up to 1406 conditions per place. [2023-11-06 22:40:10,952 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 88 selfloop transitions, 11 changer transitions 23/137 dead transitions. [2023-11-06 22:40:10,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 137 transitions, 682 flow [2023-11-06 22:40:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1458 transitions. [2023-11-06 22:40:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563380281690141 [2023-11-06 22:40:10,959 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1458 transitions. [2023-11-06 22:40:10,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1458 transitions. [2023-11-06 22:40:10,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:10,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1458 transitions. [2023-11-06 22:40:10,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.0) internal successors, (1458), 9 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,976 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 9 states and 1458 transitions. [2023-11-06 22:40:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 137 transitions, 682 flow [2023-11-06 22:40:10,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 137 transitions, 682 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:40:10,989 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 247 flow [2023-11-06 22:40:10,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=247, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-06 22:40:10,991 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2023-11-06 22:40:10,991 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 247 flow [2023-11-06 22:40:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:10,992 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, 1] [2023-11-06 22:40:11,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:11,205 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)] === [2023-11-06 22:40:11,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 55003476, now seen corresponding path program 3 times [2023-11-06 22:40:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255235376] [2023-11-06 22:40:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:11,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255235376] [2023-11-06 22:40:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255235376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:11,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961475971] [2023-11-06 22:40:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:11,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:11,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:40:12,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:40:12,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:12,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:12,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:12,236 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:12,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:12,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:12,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961475971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:12,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:12,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-06 22:40:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895116446] [2023-11-06 22:40:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:40:12,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:12,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:12,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:12,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:12,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:13,404 INFO L124 PetriNetUnfolderBase]: 1837/3232 cut-off events. [2023-11-06 22:40:13,405 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-11-06 22:40:13,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8387 conditions, 3232 events. 1837/3232 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19658 event pairs, 365 based on Foata normal form. 2/3174 useless extension candidates. Maximal degree in co-relation 8360. Up to 1497 conditions per place. [2023-11-06 22:40:13,434 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 114 selfloop transitions, 11 changer transitions 23/163 dead transitions. [2023-11-06 22:40:13,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 163 transitions, 892 flow [2023-11-06 22:40:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1472 transitions. [2023-11-06 22:40:13,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46071987480438187 [2023-11-06 22:40:13,441 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1472 transitions. [2023-11-06 22:40:13,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1472 transitions. [2023-11-06 22:40:13,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:13,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1472 transitions. [2023-11-06 22:40:13,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.55555555555554) internal successors, (1472), 9 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:13,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:13,455 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:13,455 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 247 flow. Second operand 9 states and 1472 transitions. [2023-11-06 22:40:13,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 163 transitions, 892 flow [2023-11-06 22:40:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 163 transitions, 886 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:13,473 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 323 flow [2023-11-06 22:40:13,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2023-11-06 22:40:13,474 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2023-11-06 22:40:13,475 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 323 flow [2023-11-06 22:40:13,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:13,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:13,476 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, 1] [2023-11-06 22:40:13,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:40:13,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:13,682 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)] === [2023-11-06 22:40:13,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash -274078666, now seen corresponding path program 4 times [2023-11-06 22:40:13,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:13,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060743168] [2023-11-06 22:40:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060743168] [2023-11-06 22:40:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060743168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414483733] [2023-11-06 22:40:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:40:14,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:14,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:40:14,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:40:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:14,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:14,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:14,842 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:14,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:14,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414483733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:14,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:14,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-06 22:40:14,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955060582] [2023-11-06 22:40:14,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:40:15,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 323 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:15,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:16,294 INFO L124 PetriNetUnfolderBase]: 2528/4625 cut-off events. [2023-11-06 22:40:16,294 INFO L125 PetriNetUnfolderBase]: For 4634/4634 co-relation queries the response was YES. [2023-11-06 22:40:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13338 conditions, 4625 events. 2528/4625 cut-off events. For 4634/4634 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 31684 event pairs, 600 based on Foata normal form. 2/4562 useless extension candidates. Maximal degree in co-relation 13304. Up to 1877 conditions per place. [2023-11-06 22:40:16,334 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 127 selfloop transitions, 19 changer transitions 27/188 dead transitions. [2023-11-06 22:40:16,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 188 transitions, 1165 flow [2023-11-06 22:40:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1476 transitions. [2023-11-06 22:40:16,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619718309859155 [2023-11-06 22:40:16,341 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1476 transitions. [2023-11-06 22:40:16,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1476 transitions. [2023-11-06 22:40:16,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:16,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1476 transitions. [2023-11-06 22:40:16,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.0) internal successors, (1476), 9 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:16,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:16,355 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:16,355 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 323 flow. Second operand 9 states and 1476 transitions. [2023-11-06 22:40:16,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 188 transitions, 1165 flow [2023-11-06 22:40:16,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 188 transitions, 1128 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-06 22:40:16,401 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 467 flow [2023-11-06 22:40:16,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-11-06 22:40:16,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2023-11-06 22:40:16,405 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 467 flow [2023-11-06 22:40:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:16,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:16,406 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, 1] [2023-11-06 22:40:16,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:16,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:16,613 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)] === [2023-11-06 22:40:16,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash 123436936, now seen corresponding path program 5 times [2023-11-06 22:40:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940067696] [2023-11-06 22:40:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:17,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940067696] [2023-11-06 22:40:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940067696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097245647] [2023-11-06 22:40:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:40:17,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:17,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:17,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:40:17,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:17,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:40:17,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:17,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 22:40:17,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:17,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:17,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:17,896 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:17,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 22:40:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:17,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:18,266 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int)) (~i~0 Int) (~j~0 Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_162) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~j~0 4))))) (or (< ~i~0 0) (< c_~n~0 (+ ~i~0 1)) (< c_~n~0 (+ .cse0 1)) (= (select .cse1 (+ c_~f~0.offset (* .cse0 4))) (select .cse1 (+ (* ~i~0 4) c_~f~0.offset))) (< .cse0 0))))) is different from false [2023-11-06 22:40:18,324 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int)) (v_ArrVal_161 (Array Int Int)) (~i~0 Int) (~j~0 Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_161) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_162) c_~f~0.base))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* ~j~0 4))))) (or (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ (* ~i~0 4) c_~f~0.offset))) (< ~i~0 0) (< c_~n~0 (+ ~i~0 1)) (< .cse1 0) (< c_~n~0 (+ .cse1 1)))))) is different from false [2023-11-06 22:40:18,714 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:18,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 109 [2023-11-06 22:40:18,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:18,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 546 treesize of output 546 [2023-11-06 22:40:18,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:18,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 611 treesize of output 483 [2023-11-06 22:40:18,941 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:18,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 431 treesize of output 393 [2023-11-06 22:40:19,040 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:19,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 192 treesize of output 199 [2023-11-06 22:40:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097245647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:22,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-06 22:40:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898473478] [2023-11-06 22:40:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:40:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:40:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=506, Unknown=2, NotChecked=94, Total=702 [2023-11-06 22:40:22,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 355 [2023-11-06 22:40:22,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 467 flow. Second operand has 27 states, 27 states have (on average 119.66666666666667) internal successors, (3231), 27 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:22,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:22,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 355 [2023-11-06 22:40:22,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:25,181 INFO L124 PetriNetUnfolderBase]: 5276/9795 cut-off events. [2023-11-06 22:40:25,181 INFO L125 PetriNetUnfolderBase]: For 14176/14176 co-relation queries the response was YES. [2023-11-06 22:40:25,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 9795 events. 5276/9795 cut-off events. For 14176/14176 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 77716 event pairs, 1462 based on Foata normal form. 4/9669 useless extension candidates. Maximal degree in co-relation 29888. Up to 4019 conditions per place. [2023-11-06 22:40:25,277 INFO L140 encePairwiseOnDemand]: 345/355 looper letters, 161 selfloop transitions, 37 changer transitions 30/243 dead transitions. [2023-11-06 22:40:25,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 243 transitions, 1749 flow [2023-11-06 22:40:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:40:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:40:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1543 transitions. [2023-11-06 22:40:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36220657276995305 [2023-11-06 22:40:25,285 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1543 transitions. [2023-11-06 22:40:25,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1543 transitions. [2023-11-06 22:40:25,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:25,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1543 transitions. [2023-11-06 22:40:25,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 128.58333333333334) internal successors, (1543), 12 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:25,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:25,302 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:25,302 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 467 flow. Second operand 12 states and 1543 transitions. [2023-11-06 22:40:25,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 243 transitions, 1749 flow [2023-11-06 22:40:25,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 243 transitions, 1695 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-06 22:40:25,511 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 812 flow [2023-11-06 22:40:25,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=812, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2023-11-06 22:40:25,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2023-11-06 22:40:25,512 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 812 flow [2023-11-06 22:40:25,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 119.66666666666667) internal successors, (3231), 27 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:25,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:25,514 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, 1] [2023-11-06 22:40:25,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:25,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:40:25,721 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)] === [2023-11-06 22:40:25,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash 832933498, now seen corresponding path program 6 times [2023-11-06 22:40:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388622997] [2023-11-06 22:40:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388622997] [2023-11-06 22:40:25,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388622997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:25,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:25,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:40:25,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139771529] [2023-11-06 22:40:25,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:25,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:25,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:25,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:25,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 355 [2023-11-06 22:40:25,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 812 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:25,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:25,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 355 [2023-11-06 22:40:25,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:27,528 INFO L124 PetriNetUnfolderBase]: 5010/9715 cut-off events. [2023-11-06 22:40:27,528 INFO L125 PetriNetUnfolderBase]: For 23419/23504 co-relation queries the response was YES. [2023-11-06 22:40:27,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32784 conditions, 9715 events. 5010/9715 cut-off events. For 23419/23504 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 78211 event pairs, 3877 based on Foata normal form. 34/9592 useless extension candidates. Maximal degree in co-relation 32606. Up to 8748 conditions per place. [2023-11-06 22:40:27,622 INFO L140 encePairwiseOnDemand]: 352/355 looper letters, 101 selfloop transitions, 2 changer transitions 4/125 dead transitions. [2023-11-06 22:40:27,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1165 flow [2023-11-06 22:40:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-11-06 22:40:27,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49577464788732395 [2023-11-06 22:40:27,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-11-06 22:40:27,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-11-06 22:40:27,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:27,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-11-06 22:40:27,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:27,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:27,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:27,632 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 812 flow. Second operand 3 states and 528 transitions. [2023-11-06 22:40:27,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1165 flow [2023-11-06 22:40:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 125 transitions, 1151 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-06 22:40:27,952 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 806 flow [2023-11-06 22:40:27,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=806, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2023-11-06 22:40:27,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2023-11-06 22:40:27,954 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 806 flow [2023-11-06 22:40:27,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:27,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:27,955 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, 1] [2023-11-06 22:40:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:40:27,956 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)] === [2023-11-06 22:40:27,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:27,957 INFO L85 PathProgramCache]: Analyzing trace with hash 679121886, now seen corresponding path program 7 times [2023-11-06 22:40:27,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:27,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765697796] [2023-11-06 22:40:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:27,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:28,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765697796] [2023-11-06 22:40:28,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765697796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:28,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:28,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:40:28,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586088627] [2023-11-06 22:40:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:28,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:28,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:40:28,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:40:28,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 806 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:28,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:28,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:40:28,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:30,846 INFO L124 PetriNetUnfolderBase]: 8035/15470 cut-off events. [2023-11-06 22:40:30,846 INFO L125 PetriNetUnfolderBase]: For 36984/37109 co-relation queries the response was YES. [2023-11-06 22:40:31,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52105 conditions, 15470 events. 8035/15470 cut-off events. For 36984/37109 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 131905 event pairs, 2680 based on Foata normal form. 82/15465 useless extension candidates. Maximal degree in co-relation 36498. Up to 9790 conditions per place. [2023-11-06 22:40:31,060 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 274 selfloop transitions, 18 changer transitions 8/309 dead transitions. [2023-11-06 22:40:31,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 309 transitions, 3057 flow [2023-11-06 22:40:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:40:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:40:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1804 transitions. [2023-11-06 22:40:31,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619718309859155 [2023-11-06 22:40:31,069 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1804 transitions. [2023-11-06 22:40:31,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1804 transitions. [2023-11-06 22:40:31,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:31,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1804 transitions. [2023-11-06 22:40:31,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.0) internal successors, (1804), 11 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:31,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 355.0) internal successors, (4260), 12 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:31,085 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 355.0) internal successors, (4260), 12 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:31,085 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 806 flow. Second operand 11 states and 1804 transitions. [2023-11-06 22:40:31,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 309 transitions, 3057 flow [2023-11-06 22:40:31,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 309 transitions, 3053 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:40:31,407 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 964 flow [2023-11-06 22:40:31,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=964, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2023-11-06 22:40:31,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2023-11-06 22:40:31,410 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 964 flow [2023-11-06 22:40:31,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:31,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:31,412 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, 1] [2023-11-06 22:40:31,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:40:31,412 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)] === [2023-11-06 22:40:31,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -127773120, now seen corresponding path program 8 times [2023-11-06 22:40:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960670225] [2023-11-06 22:40:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:32,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960670225] [2023-11-06 22:40:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960670225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:32,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843343706] [2023-11-06 22:40:32,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:32,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:32,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:32,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:40:32,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:40:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:32,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:40:32,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:32,569 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:32,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:32,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843343706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:32,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:32,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-06 22:40:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115811473] [2023-11-06 22:40:32,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:32,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:40:32,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:32,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:32,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:32,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:32,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:35,692 INFO L124 PetriNetUnfolderBase]: 9789/17966 cut-off events. [2023-11-06 22:40:35,692 INFO L125 PetriNetUnfolderBase]: For 51402/51446 co-relation queries the response was YES. [2023-11-06 22:40:35,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65560 conditions, 17966 events. 9789/17966 cut-off events. For 51402/51446 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 151626 event pairs, 2187 based on Foata normal form. 56/17868 useless extension candidates. Maximal degree in co-relation 57747. Up to 11396 conditions per place. [2023-11-06 22:40:35,865 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 161 selfloop transitions, 37 changer transitions 28/251 dead transitions. [2023-11-06 22:40:35,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 251 transitions, 2132 flow [2023-11-06 22:40:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:40:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:40:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1325 transitions. [2023-11-06 22:40:35,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665492957746479 [2023-11-06 22:40:35,872 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1325 transitions. [2023-11-06 22:40:35,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1325 transitions. [2023-11-06 22:40:35,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:35,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1325 transitions. [2023-11-06 22:40:35,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:35,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:35,895 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:35,903 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 964 flow. Second operand 8 states and 1325 transitions. [2023-11-06 22:40:35,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 251 transitions, 2132 flow [2023-11-06 22:40:36,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 251 transitions, 2130 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:40:36,726 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1209 flow [2023-11-06 22:40:36,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2023-11-06 22:40:36,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2023-11-06 22:40:36,727 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1209 flow [2023-11-06 22:40:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:36,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:36,730 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, 1] [2023-11-06 22:40:36,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:40:36,936 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)] === [2023-11-06 22:40:36,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 336887320, now seen corresponding path program 9 times [2023-11-06 22:40:36,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:36,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467672104] [2023-11-06 22:40:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467672104] [2023-11-06 22:40:37,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467672104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924923071] [2023-11-06 22:40:37,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:40:37,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:37,688 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:37,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:40:37,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:40:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:37,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:37,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:38,012 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:38,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:38,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924923071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:38,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:38,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-06 22:40:38,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629916494] [2023-11-06 22:40:38,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:38,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:38,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:40:38,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:38,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:38,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:38,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:38,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:42,129 INFO L124 PetriNetUnfolderBase]: 10224/19079 cut-off events. [2023-11-06 22:40:42,129 INFO L125 PetriNetUnfolderBase]: For 67178/67222 co-relation queries the response was YES. [2023-11-06 22:40:42,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75476 conditions, 19079 events. 10224/19079 cut-off events. For 67178/67222 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 166126 event pairs, 2273 based on Foata normal form. 52/18977 useless extension candidates. Maximal degree in co-relation 66834. Up to 11031 conditions per place. [2023-11-06 22:40:42,305 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 165 selfloop transitions, 39 changer transitions 36/265 dead transitions. [2023-11-06 22:40:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 265 transitions, 2426 flow [2023-11-06 22:40:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1477 transitions. [2023-11-06 22:40:42,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622848200312989 [2023-11-06 22:40:42,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1477 transitions. [2023-11-06 22:40:42,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1477 transitions. [2023-11-06 22:40:42,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:42,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1477 transitions. [2023-11-06 22:40:42,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:42,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:42,325 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:42,325 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1209 flow. Second operand 9 states and 1477 transitions. [2023-11-06 22:40:42,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 265 transitions, 2426 flow [2023-11-06 22:40:43,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 265 transitions, 2327 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-06 22:40:43,763 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1264 flow [2023-11-06 22:40:43,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1264, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2023-11-06 22:40:43,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2023-11-06 22:40:43,764 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1264 flow [2023-11-06 22:40:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:43,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:43,764 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, 1] [2023-11-06 22:40:43,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:40:43,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:40:43,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:40:43,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1068306882, now seen corresponding path program 10 times [2023-11-06 22:40:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760094098] [2023-11-06 22:40:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:43,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760094098] [2023-11-06 22:40:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760094098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573890605] [2023-11-06 22:40:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:40:44,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:44,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:44,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:40:44,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:40:44,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:44,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:44,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:45,023 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:40:45,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:40:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:45,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573890605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:45,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:40:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-11-06 22:40:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494886388] [2023-11-06 22:40:45,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:40:45,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:40:45,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:40:45,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:48,552 INFO L124 PetriNetUnfolderBase]: 10104/18893 cut-off events. [2023-11-06 22:40:48,553 INFO L125 PetriNetUnfolderBase]: For 69878/69922 co-relation queries the response was YES. [2023-11-06 22:40:48,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74488 conditions, 18893 events. 10104/18893 cut-off events. For 69878/69922 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 164769 event pairs, 2377 based on Foata normal form. 52/18791 useless extension candidates. Maximal degree in co-relation 74111. Up to 12394 conditions per place. [2023-11-06 22:40:48,706 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 159 selfloop transitions, 33 changer transitions 45/262 dead transitions. [2023-11-06 22:40:48,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 262 transitions, 2389 flow [2023-11-06 22:40:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:40:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:40:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1633 transitions. [2023-11-06 22:40:48,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-06 22:40:48,716 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1633 transitions. [2023-11-06 22:40:48,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1633 transitions. [2023-11-06 22:40:48,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:48,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1633 transitions. [2023-11-06 22:40:48,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:48,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:48,737 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:48,738 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1264 flow. Second operand 10 states and 1633 transitions. [2023-11-06 22:40:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 262 transitions, 2389 flow [2023-11-06 22:40:49,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 262 transitions, 2297 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-06 22:40:49,873 INFO L231 Difference]: Finished difference. Result has 126 places, 132 transitions, 1172 flow [2023-11-06 22:40:49,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1172, PETRI_PLACES=126, PETRI_TRANSITIONS=132} [2023-11-06 22:40:49,873 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2023-11-06 22:40:49,874 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 132 transitions, 1172 flow [2023-11-06 22:40:49,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:49,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:49,874 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, 1] [2023-11-06 22:40:49,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:50,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:40:50,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:40:50,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -527612348, now seen corresponding path program 11 times [2023-11-06 22:40:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:50,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085290920] [2023-11-06 22:40:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:50,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085290920] [2023-11-06 22:40:50,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085290920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:50,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:50,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:40:50,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166819797] [2023-11-06 22:40:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:50,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:50,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:40:50,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:40:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 132 transitions, 1172 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:50,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:50,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:40:50,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:53,755 INFO L124 PetriNetUnfolderBase]: 10033/19706 cut-off events. [2023-11-06 22:40:53,756 INFO L125 PetriNetUnfolderBase]: For 76160/76577 co-relation queries the response was YES. [2023-11-06 22:40:53,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76414 conditions, 19706 events. 10033/19706 cut-off events. For 76160/76577 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 178321 event pairs, 4351 based on Foata normal form. 158/19731 useless extension candidates. Maximal degree in co-relation 75933. Up to 12885 conditions per place. [2023-11-06 22:40:53,905 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 290 selfloop transitions, 20 changer transitions 9/329 dead transitions. [2023-11-06 22:40:53,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 329 transitions, 3693 flow [2023-11-06 22:40:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:40:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:40:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1489 transitions. [2023-11-06 22:40:53,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46604068857589986 [2023-11-06 22:40:53,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1489 transitions. [2023-11-06 22:40:53,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1489 transitions. [2023-11-06 22:40:53,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:53,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1489 transitions. [2023-11-06 22:40:53,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.44444444444446) internal successors, (1489), 9 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:53,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:53,928 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:53,929 INFO L175 Difference]: Start difference. First operand has 126 places, 132 transitions, 1172 flow. Second operand 9 states and 1489 transitions. [2023-11-06 22:40:53,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 329 transitions, 3693 flow [2023-11-06 22:40:55,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 329 transitions, 3471 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-06 22:40:55,093 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1244 flow [2023-11-06 22:40:55,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1244, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2023-11-06 22:40:55,094 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2023-11-06 22:40:55,094 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1244 flow [2023-11-06 22:40:55,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:55,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:55,095 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, 1] [2023-11-06 22:40:55,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:40:55,096 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:40:55,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2132425666, now seen corresponding path program 12 times [2023-11-06 22:40:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471429397] [2023-11-06 22:40:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:55,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:55,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:55,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471429397] [2023-11-06 22:40:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471429397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:55,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:55,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:40:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706193079] [2023-11-06 22:40:55,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:55,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:55,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 355 [2023-11-06 22:40:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 1244 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 355 [2023-11-06 22:40:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:58,296 INFO L124 PetriNetUnfolderBase]: 9350/18781 cut-off events. [2023-11-06 22:40:58,296 INFO L125 PetriNetUnfolderBase]: For 68187/68489 co-relation queries the response was YES. [2023-11-06 22:40:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71728 conditions, 18781 events. 9350/18781 cut-off events. For 68187/68489 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 172128 event pairs, 7864 based on Foata normal form. 112/18636 useless extension candidates. Maximal degree in co-relation 61174. Up to 17527 conditions per place. [2023-11-06 22:40:58,427 INFO L140 encePairwiseOnDemand]: 352/355 looper letters, 121 selfloop transitions, 2 changer transitions 2/155 dead transitions. [2023-11-06 22:40:58,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 155 transitions, 1601 flow [2023-11-06 22:40:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-11-06 22:40:58,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49577464788732395 [2023-11-06 22:40:58,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-11-06 22:40:58,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-11-06 22:40:58,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:58,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-11-06 22:40:58,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:58,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:58,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:58,435 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1244 flow. Second operand 3 states and 528 transitions. [2023-11-06 22:40:58,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 155 transitions, 1601 flow [2023-11-06 22:40:59,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 155 transitions, 1580 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:40:59,384 INFO L231 Difference]: Finished difference. Result has 132 places, 136 transitions, 1194 flow [2023-11-06 22:40:59,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1194, PETRI_PLACES=132, PETRI_TRANSITIONS=136} [2023-11-06 22:40:59,385 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2023-11-06 22:40:59,385 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 136 transitions, 1194 flow [2023-11-06 22:40:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:59,386 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, 1] [2023-11-06 22:40:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:40:59,386 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:40:59,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash -442051900, now seen corresponding path program 13 times [2023-11-06 22:40:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238034981] [2023-11-06 22:40:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238034981] [2023-11-06 22:40:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238034981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:59,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:59,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:40:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713765929] [2023-11-06 22:40:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:40:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:40:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:40:59,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:40:59,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 136 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:59,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:59,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:40:59,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:02,244 INFO L124 PetriNetUnfolderBase]: 7621/14978 cut-off events. [2023-11-06 22:41:02,245 INFO L125 PetriNetUnfolderBase]: For 51136/51414 co-relation queries the response was YES. [2023-11-06 22:41:02,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57254 conditions, 14978 events. 7621/14978 cut-off events. For 51136/51414 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 129032 event pairs, 3912 based on Foata normal form. 158/15021 useless extension candidates. Maximal degree in co-relation 53134. Up to 12781 conditions per place. [2023-11-06 22:41:02,379 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 189 selfloop transitions, 16 changer transitions 13/228 dead transitions. [2023-11-06 22:41:02,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 228 transitions, 2255 flow [2023-11-06 22:41:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:41:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:41:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1633 transitions. [2023-11-06 22:41:02,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-06 22:41:02,384 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1633 transitions. [2023-11-06 22:41:02,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1633 transitions. [2023-11-06 22:41:02,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:02,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1633 transitions. [2023-11-06 22:41:02,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:02,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:02,400 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:02,401 INFO L175 Difference]: Start difference. First operand has 132 places, 136 transitions, 1194 flow. Second operand 10 states and 1633 transitions. [2023-11-06 22:41:02,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 228 transitions, 2255 flow [2023-11-06 22:41:03,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 228 transitions, 2248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:41:03,052 INFO L231 Difference]: Finished difference. Result has 139 places, 134 transitions, 1206 flow [2023-11-06 22:41:03,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1206, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2023-11-06 22:41:03,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2023-11-06 22:41:03,053 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 1206 flow [2023-11-06 22:41:03,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:03,055 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, 1] [2023-11-06 22:41:03,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:41:03,055 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:03,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash -205023628, now seen corresponding path program 14 times [2023-11-06 22:41:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:03,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889881198] [2023-11-06 22:41:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889881198] [2023-11-06 22:41:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889881198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860960852] [2023-11-06 22:41:03,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:41:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:04,000 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:04,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:41:04,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:41:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:04,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:41:04,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:04,173 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:41:04,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 373 [2023-11-06 22:41:04,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:41:04,425 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:04,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:41:04,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860960852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:04,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:04,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2023-11-06 22:41:04,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050542244] [2023-11-06 22:41:04,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:04,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:41:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:04,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:41:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:41:04,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 355 [2023-11-06 22:41:04,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 1206 flow. Second operand has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:04,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 355 [2023-11-06 22:41:04,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:07,659 INFO L124 PetriNetUnfolderBase]: 8301/15835 cut-off events. [2023-11-06 22:41:07,659 INFO L125 PetriNetUnfolderBase]: For 52589/52593 co-relation queries the response was YES. [2023-11-06 22:41:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60671 conditions, 15835 events. 8301/15835 cut-off events. For 52589/52593 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 136478 event pairs, 1921 based on Foata normal form. 15/15652 useless extension candidates. Maximal degree in co-relation 56247. Up to 9390 conditions per place. [2023-11-06 22:41:07,773 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 147 selfloop transitions, 38 changer transitions 40/251 dead transitions. [2023-11-06 22:41:07,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 251 transitions, 2376 flow [2023-11-06 22:41:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:41:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:41:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1413 transitions. [2023-11-06 22:41:07,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422535211267606 [2023-11-06 22:41:07,777 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1413 transitions. [2023-11-06 22:41:07,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1413 transitions. [2023-11-06 22:41:07,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:07,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1413 transitions. [2023-11-06 22:41:07,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,787 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,787 INFO L175 Difference]: Start difference. First operand has 139 places, 134 transitions, 1206 flow. Second operand 9 states and 1413 transitions. [2023-11-06 22:41:07,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 251 transitions, 2376 flow [2023-11-06 22:41:08,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 251 transitions, 2309 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-06 22:41:08,438 INFO L231 Difference]: Finished difference. Result has 140 places, 140 transitions, 1362 flow [2023-11-06 22:41:08,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1362, PETRI_PLACES=140, PETRI_TRANSITIONS=140} [2023-11-06 22:41:08,439 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2023-11-06 22:41:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 140 transitions, 1362 flow [2023-11-06 22:41:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:08,440 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, 1] [2023-11-06 22:41:08,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:41:08,641 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:08,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash 940482686, now seen corresponding path program 15 times [2023-11-06 22:41:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603052059] [2023-11-06 22:41:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603052059] [2023-11-06 22:41:09,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603052059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029893612] [2023-11-06 22:41:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:41:09,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:09,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:09,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:41:09,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:41:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:09,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:41:09,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:09,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:09,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:41:09,635 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:09,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:41:09,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029893612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:09,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:09,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-11-06 22:41:09,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660472686] [2023-11-06 22:41:09,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:41:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:41:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:41:10,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 355 [2023-11-06 22:41:10,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 140 transitions, 1362 flow. Second operand has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:10,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 355 [2023-11-06 22:41:10,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:13,398 INFO L124 PetriNetUnfolderBase]: 7830/15139 cut-off events. [2023-11-06 22:41:13,398 INFO L125 PetriNetUnfolderBase]: For 55975/55979 co-relation queries the response was YES. [2023-11-06 22:41:13,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60758 conditions, 15139 events. 7830/15139 cut-off events. For 55975/55979 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 131535 event pairs, 1917 based on Foata normal form. 10/14951 useless extension candidates. Maximal degree in co-relation 56134. Up to 7944 conditions per place. [2023-11-06 22:41:13,522 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 160 selfloop transitions, 42 changer transitions 35/263 dead transitions. [2023-11-06 22:41:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 263 transitions, 2561 flow [2023-11-06 22:41:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:41:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:41:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1558 transitions. [2023-11-06 22:41:13,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388732394366197 [2023-11-06 22:41:13,526 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1558 transitions. [2023-11-06 22:41:13,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1558 transitions. [2023-11-06 22:41:13,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:13,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1558 transitions. [2023-11-06 22:41:13,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.8) internal successors, (1558), 10 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:13,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:13,535 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:13,535 INFO L175 Difference]: Start difference. First operand has 140 places, 140 transitions, 1362 flow. Second operand 10 states and 1558 transitions. [2023-11-06 22:41:13,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 263 transitions, 2561 flow [2023-11-06 22:41:14,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 263 transitions, 2474 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-06 22:41:14,655 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1453 flow [2023-11-06 22:41:14,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1453, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2023-11-06 22:41:14,656 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2023-11-06 22:41:14,656 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1453 flow [2023-11-06 22:41:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:14,656 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, 1] [2023-11-06 22:41:14,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:14,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:14,857 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:14,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 29026426, now seen corresponding path program 16 times [2023-11-06 22:41:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:14,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197539371] [2023-11-06 22:41:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:14,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:15,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197539371] [2023-11-06 22:41:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197539371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20529962] [2023-11-06 22:41:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:41:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:15,296 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:15,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:41:15,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:41:15,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:15,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:41:15,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:15,621 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:15,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 22:41:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:15,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:15,708 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-06 22:41:15,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2023-11-06 22:41:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:15,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20529962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:15,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 22:41:15,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712083753] [2023-11-06 22:41:15,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:15,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:41:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:41:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:41:16,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-11-06 22:41:16,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1453 flow. Second operand has 21 states, 21 states have (on average 146.0952380952381) internal successors, (3068), 21 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:16,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-11-06 22:41:16,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:19,472 INFO L124 PetriNetUnfolderBase]: 7422/14477 cut-off events. [2023-11-06 22:41:19,472 INFO L125 PetriNetUnfolderBase]: For 65708/65777 co-relation queries the response was YES. [2023-11-06 22:41:19,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57733 conditions, 14477 events. 7422/14477 cut-off events. For 65708/65777 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 127115 event pairs, 3280 based on Foata normal form. 61/14273 useless extension candidates. Maximal degree in co-relation 57551. Up to 6025 conditions per place. [2023-11-06 22:41:19,576 INFO L140 encePairwiseOnDemand]: 345/355 looper letters, 80 selfloop transitions, 12 changer transitions 207/327 dead transitions. [2023-11-06 22:41:19,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 327 transitions, 3401 flow [2023-11-06 22:41:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:41:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:41:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1713 transitions. [2023-11-06 22:41:19,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43866837387964147 [2023-11-06 22:41:19,580 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1713 transitions. [2023-11-06 22:41:19,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1713 transitions. [2023-11-06 22:41:19,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:19,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1713 transitions. [2023-11-06 22:41:19,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 155.72727272727272) internal successors, (1713), 11 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:19,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 355.0) internal successors, (4260), 12 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:19,591 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 355.0) internal successors, (4260), 12 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:19,591 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1453 flow. Second operand 11 states and 1713 transitions. [2023-11-06 22:41:19,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 327 transitions, 3401 flow [2023-11-06 22:41:20,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 3219 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-11-06 22:41:20,386 INFO L231 Difference]: Finished difference. Result has 150 places, 112 transitions, 1021 flow [2023-11-06 22:41:20,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1021, PETRI_PLACES=150, PETRI_TRANSITIONS=112} [2023-11-06 22:41:20,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2023-11-06 22:41:20,387 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 112 transitions, 1021 flow [2023-11-06 22:41:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 146.0952380952381) internal successors, (3068), 21 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:20,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:20,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:20,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:20,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:20,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:20,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1618839136, now seen corresponding path program 17 times [2023-11-06 22:41:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413113920] [2023-11-06 22:41:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:23,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413113920] [2023-11-06 22:41:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413113920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840591093] [2023-11-06 22:41:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:41:23,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:23,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:23,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:23,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:41:23,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:41:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:23,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:41:23,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:23,720 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:23,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:41:23,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:23,908 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:41:23,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:41:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840591093] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:23,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:41:23,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-11-06 22:41:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505301412] [2023-11-06 22:41:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:41:24,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:41:24,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 112 transitions, 1021 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:24,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:24,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:41:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:25,661 INFO L124 PetriNetUnfolderBase]: 3674/7001 cut-off events. [2023-11-06 22:41:25,662 INFO L125 PetriNetUnfolderBase]: For 29954/29956 co-relation queries the response was YES. [2023-11-06 22:41:25,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29417 conditions, 7001 events. 3674/7001 cut-off events. For 29954/29956 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52255 event pairs, 1641 based on Foata normal form. 5/6906 useless extension candidates. Maximal degree in co-relation 29344. Up to 4865 conditions per place. [2023-11-06 22:41:25,725 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 116 selfloop transitions, 22 changer transitions 33/197 dead transitions. [2023-11-06 22:41:25,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 1848 flow [2023-11-06 22:41:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:41:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:41:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1460 transitions. [2023-11-06 22:41:25,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4569640062597809 [2023-11-06 22:41:25,728 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1460 transitions. [2023-11-06 22:41:25,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1460 transitions. [2023-11-06 22:41:25,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:25,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1460 transitions. [2023-11-06 22:41:25,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.22222222222223) internal successors, (1460), 9 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,734 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,734 INFO L175 Difference]: Start difference. First operand has 150 places, 112 transitions, 1021 flow. Second operand 9 states and 1460 transitions. [2023-11-06 22:41:25,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 1848 flow [2023-11-06 22:41:26,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 197 transitions, 1673 flow, removed 71 selfloop flow, removed 11 redundant places. [2023-11-06 22:41:26,098 INFO L231 Difference]: Finished difference. Result has 141 places, 115 transitions, 977 flow [2023-11-06 22:41:26,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=141, PETRI_TRANSITIONS=115} [2023-11-06 22:41:26,099 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2023-11-06 22:41:26,099 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 115 transitions, 977 flow [2023-11-06 22:41:26,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:26,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:26,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:26,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:26,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:26,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2136617390, now seen corresponding path program 18 times [2023-11-06 22:41:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:26,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570188657] [2023-11-06 22:41:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570188657] [2023-11-06 22:41:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570188657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529684716] [2023-11-06 22:41:29,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:41:29,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:29,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:29,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:41:30,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-06 22:41:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:30,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:41:30,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:30,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2023-11-06 22:41:30,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:41:30,385 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:30,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:30,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:30,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529684716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:30,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:30,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2023-11-06 22:41:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342110168] [2023-11-06 22:41:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:30,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:41:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:41:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:41:30,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 355 [2023-11-06 22:41:30,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 115 transitions, 977 flow. Second operand has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:30,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:30,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 355 [2023-11-06 22:41:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:32,150 INFO L124 PetriNetUnfolderBase]: 3581/6811 cut-off events. [2023-11-06 22:41:32,151 INFO L125 PetriNetUnfolderBase]: For 20638/20640 co-relation queries the response was YES. [2023-11-06 22:41:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26032 conditions, 6811 events. 3581/6811 cut-off events. For 20638/20640 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 50529 event pairs, 1108 based on Foata normal form. 5/6713 useless extension candidates. Maximal degree in co-relation 25964. Up to 4152 conditions per place. [2023-11-06 22:41:32,189 INFO L140 encePairwiseOnDemand]: 346/355 looper letters, 114 selfloop transitions, 19 changer transitions 49/208 dead transitions. [2023-11-06 22:41:32,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 208 transitions, 1825 flow [2023-11-06 22:41:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:41:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:41:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1551 transitions. [2023-11-06 22:41:32,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43690140845070424 [2023-11-06 22:41:32,192 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1551 transitions. [2023-11-06 22:41:32,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1551 transitions. [2023-11-06 22:41:32,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:32,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1551 transitions. [2023-11-06 22:41:32,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.1) internal successors, (1551), 10 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:32,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:32,201 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:32,202 INFO L175 Difference]: Start difference. First operand has 141 places, 115 transitions, 977 flow. Second operand 10 states and 1551 transitions. [2023-11-06 22:41:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 208 transitions, 1825 flow [2023-11-06 22:41:32,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 208 transitions, 1767 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-06 22:41:32,539 INFO L231 Difference]: Finished difference. Result has 143 places, 105 transitions, 876 flow [2023-11-06 22:41:32,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=876, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2023-11-06 22:41:32,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2023-11-06 22:41:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 876 flow [2023-11-06 22:41:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:32,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:32,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:32,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:41:32,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:32,741 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:32,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash 876970918, now seen corresponding path program 19 times [2023-11-06 22:41:32,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:32,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576734759] [2023-11-06 22:41:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:32,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:32,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576734759] [2023-11-06 22:41:32,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576734759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:32,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:32,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:41:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104508965] [2023-11-06 22:41:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:32,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:41:32,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 876 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:32,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:32,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:41:32,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:33,915 INFO L124 PetriNetUnfolderBase]: 2251/4432 cut-off events. [2023-11-06 22:41:33,915 INFO L125 PetriNetUnfolderBase]: For 13664/13678 co-relation queries the response was YES. [2023-11-06 22:41:33,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16544 conditions, 4432 events. 2251/4432 cut-off events. For 13664/13678 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 30914 event pairs, 1210 based on Foata normal form. 42/4443 useless extension candidates. Maximal degree in co-relation 16478. Up to 3619 conditions per place. [2023-11-06 22:41:33,957 INFO L140 encePairwiseOnDemand]: 348/355 looper letters, 86 selfloop transitions, 4 changer transitions 53/153 dead transitions. [2023-11-06 22:41:33,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 153 transitions, 1461 flow [2023-11-06 22:41:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:41:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:41:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1463 transitions. [2023-11-06 22:41:33,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45790297339593117 [2023-11-06 22:41:33,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1463 transitions. [2023-11-06 22:41:33,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1463 transitions. [2023-11-06 22:41:33,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:33,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1463 transitions. [2023-11-06 22:41:33,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.55555555555554) internal successors, (1463), 9 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:33,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:33,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:33,968 INFO L175 Difference]: Start difference. First operand has 143 places, 105 transitions, 876 flow. Second operand 9 states and 1463 transitions. [2023-11-06 22:41:33,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 153 transitions, 1461 flow [2023-11-06 22:41:34,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1356 flow, removed 16 selfloop flow, removed 14 redundant places. [2023-11-06 22:41:34,058 INFO L231 Difference]: Finished difference. Result has 132 places, 91 transitions, 693 flow [2023-11-06 22:41:34,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=693, PETRI_PLACES=132, PETRI_TRANSITIONS=91} [2023-11-06 22:41:34,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2023-11-06 22:41:34,059 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 91 transitions, 693 flow [2023-11-06 22:41:34,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:34,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 22:41:34,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:34,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1851505520, now seen corresponding path program 20 times [2023-11-06 22:41:34,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:34,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017637488] [2023-11-06 22:41:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:34,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:34,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017637488] [2023-11-06 22:41:34,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017637488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:41:34,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317531398] [2023-11-06 22:41:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 355 [2023-11-06 22:41:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 91 transitions, 693 flow. Second operand has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 355 [2023-11-06 22:41:34,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:34,793 INFO L124 PetriNetUnfolderBase]: 1007/2100 cut-off events. [2023-11-06 22:41:34,793 INFO L125 PetriNetUnfolderBase]: For 5662/5662 co-relation queries the response was YES. [2023-11-06 22:41:34,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 2100 events. 1007/2100 cut-off events. For 5662/5662 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13495 event pairs, 282 based on Foata normal form. 40/2135 useless extension candidates. Maximal degree in co-relation 7613. Up to 522 conditions per place. [2023-11-06 22:41:34,812 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 86 selfloop transitions, 19 changer transitions 25/138 dead transitions. [2023-11-06 22:41:34,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1122 flow [2023-11-06 22:41:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:41:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:41:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1317 transitions. [2023-11-06 22:41:34,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637323943661972 [2023-11-06 22:41:34,815 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1317 transitions. [2023-11-06 22:41:34,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1317 transitions. [2023-11-06 22:41:34,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:34,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1317 transitions. [2023-11-06 22:41:34,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.625) internal successors, (1317), 8 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,823 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,823 INFO L175 Difference]: Start difference. First operand has 132 places, 91 transitions, 693 flow. Second operand 8 states and 1317 transitions. [2023-11-06 22:41:34,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1122 flow [2023-11-06 22:41:34,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 138 transitions, 989 flow, removed 42 selfloop flow, removed 16 redundant places. [2023-11-06 22:41:34,872 INFO L231 Difference]: Finished difference. Result has 107 places, 62 transitions, 394 flow [2023-11-06 22:41:34,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=107, PETRI_TRANSITIONS=62} [2023-11-06 22:41:34,873 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2023-11-06 22:41:34,873 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 62 transitions, 394 flow [2023-11-06 22:41:34,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.28571428571428) internal successors, (1101), 7 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:34,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:34,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:34,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:41:34,875 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:34,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1846729296, now seen corresponding path program 21 times [2023-11-06 22:41:34,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:34,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887831111] [2023-11-06 22:41:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:37,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887831111] [2023-11-06 22:41:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887831111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361927321] [2023-11-06 22:41:37,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:41:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:37,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:37,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:41:37,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:41:37,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:37,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:41:37,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:37,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:37,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:37,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361927321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:37,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-06 22:41:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712103051] [2023-11-06 22:41:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:41:37,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:41:37,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 62 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:37,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:37,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:41:37,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:38,214 INFO L124 PetriNetUnfolderBase]: 631/1282 cut-off events. [2023-11-06 22:41:38,214 INFO L125 PetriNetUnfolderBase]: For 2117/2151 co-relation queries the response was YES. [2023-11-06 22:41:38,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 1282 events. 631/1282 cut-off events. For 2117/2151 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7575 event pairs, 302 based on Foata normal form. 2/1228 useless extension candidates. Maximal degree in co-relation 4085. Up to 659 conditions per place. [2023-11-06 22:41:38,220 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 81 selfloop transitions, 9 changer transitions 16/124 dead transitions. [2023-11-06 22:41:38,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 124 transitions, 894 flow [2023-11-06 22:41:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:41:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:41:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1448 transitions. [2023-11-06 22:41:38,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320813771518 [2023-11-06 22:41:38,223 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1448 transitions. [2023-11-06 22:41:38,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1448 transitions. [2023-11-06 22:41:38,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:38,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1448 transitions. [2023-11-06 22:41:38,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.88888888888889) internal successors, (1448), 9 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,228 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 355.0) internal successors, (3550), 10 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,228 INFO L175 Difference]: Start difference. First operand has 107 places, 62 transitions, 394 flow. Second operand 9 states and 1448 transitions. [2023-11-06 22:41:38,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 124 transitions, 894 flow [2023-11-06 22:41:38,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 816 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-11-06 22:41:38,242 INFO L231 Difference]: Finished difference. Result has 100 places, 66 transitions, 406 flow [2023-11-06 22:41:38,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=100, PETRI_TRANSITIONS=66} [2023-11-06 22:41:38,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2023-11-06 22:41:38,243 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 66 transitions, 406 flow [2023-11-06 22:41:38,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:38,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:38,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 22:41:38,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:38,450 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:38,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1030163352, now seen corresponding path program 22 times [2023-11-06 22:41:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:38,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001284477] [2023-11-06 22:41:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:41,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001284477] [2023-11-06 22:41:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001284477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617621247] [2023-11-06 22:41:41,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:41:41,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:41,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:41,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:41,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:41:41,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:41:41,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:41,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:41:41,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:42,147 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:42,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:42,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:42,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617621247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:42,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:42,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 17 [2023-11-06 22:41:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325962373] [2023-11-06 22:41:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:42,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:41:42,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:41:42,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 66 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:42,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:42,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:41:42,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:42,874 INFO L124 PetriNetUnfolderBase]: 653/1350 cut-off events. [2023-11-06 22:41:42,875 INFO L125 PetriNetUnfolderBase]: For 1657/1658 co-relation queries the response was YES. [2023-11-06 22:41:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 1350 events. 653/1350 cut-off events. For 1657/1658 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8072 event pairs, 322 based on Foata normal form. 2/1296 useless extension candidates. Maximal degree in co-relation 4334. Up to 731 conditions per place. [2023-11-06 22:41:42,885 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 97 selfloop transitions, 12 changer transitions 11/138 dead transitions. [2023-11-06 22:41:42,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 946 flow [2023-11-06 22:41:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:41:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:41:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1613 transitions. [2023-11-06 22:41:42,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543661971830986 [2023-11-06 22:41:42,888 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1613 transitions. [2023-11-06 22:41:42,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1613 transitions. [2023-11-06 22:41:42,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:42,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1613 transitions. [2023-11-06 22:41:42,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.3) internal successors, (1613), 10 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:42,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:42,896 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 355.0) internal successors, (3905), 11 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:42,897 INFO L175 Difference]: Start difference. First operand has 100 places, 66 transitions, 406 flow. Second operand 10 states and 1613 transitions. [2023-11-06 22:41:42,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 946 flow [2023-11-06 22:41:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 915 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-06 22:41:42,907 INFO L231 Difference]: Finished difference. Result has 104 places, 69 transitions, 438 flow [2023-11-06 22:41:42,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=104, PETRI_TRANSITIONS=69} [2023-11-06 22:41:42,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2023-11-06 22:41:42,908 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 69 transitions, 438 flow [2023-11-06 22:41:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:42,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:42,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:42,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:43,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:43,116 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:43,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash -539320826, now seen corresponding path program 23 times [2023-11-06 22:41:43,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:43,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826843829] [2023-11-06 22:41:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:46,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826843829] [2023-11-06 22:41:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826843829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749943503] [2023-11-06 22:41:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:41:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:46,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:46,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:41:46,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:41:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:41:46,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:41:46,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:46,467 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:41:46,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-06 22:41:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:41:46,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749943503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:46,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:41:46,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-06 22:41:46,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990776900] [2023-11-06 22:41:46,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:41:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:41:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:41:46,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 355 [2023-11-06 22:41:46,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 69 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:46,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:46,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 355 [2023-11-06 22:41:46,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:47,071 INFO L124 PetriNetUnfolderBase]: 645/1314 cut-off events. [2023-11-06 22:41:47,071 INFO L125 PetriNetUnfolderBase]: For 1753/1754 co-relation queries the response was YES. [2023-11-06 22:41:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 1314 events. 645/1314 cut-off events. For 1753/1754 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7762 event pairs, 328 based on Foata normal form. 2/1260 useless extension candidates. Maximal degree in co-relation 4377. Up to 731 conditions per place. [2023-11-06 22:41:47,079 INFO L140 encePairwiseOnDemand]: 347/355 looper letters, 71 selfloop transitions, 10 changer transitions 26/125 dead transitions. [2023-11-06 22:41:47,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 885 flow [2023-11-06 22:41:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:41:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:41:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1299 transitions. [2023-11-06 22:41:47,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573943661971831 [2023-11-06 22:41:47,086 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1299 transitions. [2023-11-06 22:41:47,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1299 transitions. [2023-11-06 22:41:47,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:47,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1299 transitions. [2023-11-06 22:41:47,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.375) internal successors, (1299), 8 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:47,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:47,093 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:47,094 INFO L175 Difference]: Start difference. First operand has 104 places, 69 transitions, 438 flow. Second operand 8 states and 1299 transitions. [2023-11-06 22:41:47,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 885 flow [2023-11-06 22:41:47,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 125 transitions, 852 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-06 22:41:47,106 INFO L231 Difference]: Finished difference. Result has 105 places, 67 transitions, 418 flow [2023-11-06 22:41:47,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=105, PETRI_TRANSITIONS=67} [2023-11-06 22:41:47,107 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2023-11-06 22:41:47,107 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 67 transitions, 418 flow [2023-11-06 22:41:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:47,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:47,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:47,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5373460-9b25-4543-82b8-9cbc0f5ac708/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:47,312 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:41:47,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash -197512360, now seen corresponding path program 24 times [2023-11-06 22:41:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:47,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407947466] [2023-11-06 22:41:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:47,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat