./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:14:48,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:14:48,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:14:48,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:14:48,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:14:48,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:14:48,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:14:48,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:14:48,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:14:48,803 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:14:48,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:14:48,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:14:48,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:14:48,805 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:14:48,806 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:14:48,806 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:14:48,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:14:48,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:14:48,808 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:14:48,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:14:48,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:14:48,813 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:14:48,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:14:48,814 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:14:48,814 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:14:48,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:14:48,815 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:14:48,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:14:48,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:14:48,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:14:48,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:14:48,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:14:48,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:14:48,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:14:48,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:14:48,818 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:14:48,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:14:48,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:14:48,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:14:48,819 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:14:48,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:14:48,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:14:48,819 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_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 [2023-11-29 00:14:49,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:14:49,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:14:49,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:14:49,070 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:14:49,070 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:14:49,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2023-11-29 00:14:51,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:14:51,938 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:14:51,939 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2023-11-29 00:14:51,945 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/data/1d1ad1e8a/ff740ffa819740eba9f936deff1293d2/FLAGdb0b1317f [2023-11-29 00:14:51,956 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/data/1d1ad1e8a/ff740ffa819740eba9f936deff1293d2 [2023-11-29 00:14:51,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:14:51,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:14:51,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:14:51,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:14:51,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:14:51,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:14:51" (1/1) ... [2023-11-29 00:14:51,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a99d917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:51, skipping insertion in model container [2023-11-29 00:14:51,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:14:51" (1/1) ... [2023-11-29 00:14:51,992 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:14:52,137 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_12c834b3-3f9d-4411-b493-bb7609707c36/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2023-11-29 00:14:52,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:14:52,156 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:14:52,180 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_12c834b3-3f9d-4411-b493-bb7609707c36/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2592,2605] [2023-11-29 00:14:52,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:14:52,192 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:14:52,193 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:14:52,201 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:14:52,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52 WrapperNode [2023-11-29 00:14:52,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:14:52,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:14:52,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:14:52,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:14:52,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,240 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-29 00:14:52,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:14:52,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:14:52,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:14:52,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:14:52,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,254 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,270 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 00:14:52,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,285 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:14:52,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:14:52,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:14:52,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:14:52,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (1/1) ... [2023-11-29 00:14:52,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:14:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:52,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:14:52,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:14:52,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:14:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:14:52,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:14:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:14:52,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:14:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 00:14:52,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:14:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:14:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:14:52,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:14:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:14:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:14:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:14:52,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:14:52,364 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:14:52,482 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:14:52,484 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:14:52,725 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:14:52,912 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:14:52,912 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 00:14:52,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:14:52 BoogieIcfgContainer [2023-11-29 00:14:52,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:14:52,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:14:52,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:14:52,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:14:52,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:14:51" (1/3) ... [2023-11-29 00:14:52,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309520a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:14:52, skipping insertion in model container [2023-11-29 00:14:52,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:52" (2/3) ... [2023-11-29 00:14:52,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309520a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:14:52, skipping insertion in model container [2023-11-29 00:14:52,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:14:52" (3/3) ... [2023-11-29 00:14:52,920 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-11-29 00:14:52,928 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:14:52,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:14:52,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:14:52,937 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:14:53,024 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:14:53,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 00:14:53,080 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-29 00:14:53,080 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:14:53,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-29 00:14:53,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-29 00:14:53,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-29 00:14:53,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:14:53,102 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c9a6a6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:14:53,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 00:14:53,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:14:53,115 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-29 00:14:53,115 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 00:14:53,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:53,116 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] [2023-11-29 00:14:53,117 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)] === [2023-11-29 00:14:53,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash -295874381, now seen corresponding path program 1 times [2023-11-29 00:14:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034470825] [2023-11-29 00:14:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034470825] [2023-11-29 00:14:53,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034470825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:53,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:53,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:14:53,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969221236] [2023-11-29 00:14:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:14:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:14:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:14:53,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:14:53,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:53,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:53,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:14:53,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:14:53,762 INFO L124 PetriNetUnfolderBase]: 674/1034 cut-off events. [2023-11-29 00:14:53,762 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-29 00:14:53,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 1034 events. 674/1034 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4060 event pairs, 140 based on Foata normal form. 1/1021 useless extension candidates. Maximal degree in co-relation 1706. Up to 740 conditions per place. [2023-11-29 00:14:53,775 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-29 00:14:53,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2023-11-29 00:14:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:14:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:14:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-29 00:14:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2023-11-29 00:14:53,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-29 00:14:53,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-29 00:14:53,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:14:53,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-29 00:14:53,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:53,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:53,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:53,800 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2023-11-29 00:14:53,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2023-11-29 00:14:53,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 00:14:53,809 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2023-11-29 00:14:53,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-11-29 00:14:53,814 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-29 00:14:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2023-11-29 00:14:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:53,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:53,815 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] [2023-11-29 00:14:53,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:14:53,816 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)] === [2023-11-29 00:14:53,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2110752150, now seen corresponding path program 1 times [2023-11-29 00:14:53,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:53,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802710554] [2023-11-29 00:14:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:53,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802710554] [2023-11-29 00:14:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802710554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:14:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119006660] [2023-11-29 00:14:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:54,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:14:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:14:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:14:54,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2023-11-29 00:14:54,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:54,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2023-11-29 00:14:54,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:14:54,184 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2023-11-29 00:14:54,185 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-11-29 00:14:54,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4230 event pairs, 447 based on Foata normal form. 0/1003 useless extension candidates. Maximal degree in co-relation 865. Up to 984 conditions per place. [2023-11-29 00:14:54,195 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-11-29 00:14:54,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2023-11-29 00:14:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:14:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:14:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-29 00:14:54,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 00:14:54,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-29 00:14:54,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-29 00:14:54,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:14:54,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-29 00:14:54,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,199 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2023-11-29 00:14:54,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2023-11-29 00:14:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:14:54,202 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2023-11-29 00:14:54,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-29 00:14:54,203 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-29 00:14:54,203 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2023-11-29 00:14:54,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:54,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:54,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:14:54,204 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)] === [2023-11-29 00:14:54,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1169432983, now seen corresponding path program 1 times [2023-11-29 00:14:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:54,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339109751] [2023-11-29 00:14:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:14:54,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:54,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339109751] [2023-11-29 00:14:54,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339109751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:54,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:54,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759065003] [2023-11-29 00:14:54,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:14:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:14:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:54,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:14:54,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:54,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:14:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:14:54,598 INFO L124 PetriNetUnfolderBase]: 865/1278 cut-off events. [2023-11-29 00:14:54,598 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2023-11-29 00:14:54,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 1278 events. 865/1278 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5201 event pairs, 265 based on Foata normal form. 0/1230 useless extension candidates. Maximal degree in co-relation 2814. Up to 649 conditions per place. [2023-11-29 00:14:54,610 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-29 00:14:54,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2023-11-29 00:14:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:14:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:14:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2023-11-29 00:14:54,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-29 00:14:54,613 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 67 transitions. [2023-11-29 00:14:54,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 67 transitions. [2023-11-29 00:14:54,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:14:54,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 67 transitions. [2023-11-29 00:14:54,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,616 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2023-11-29 00:14:54,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2023-11-29 00:14:54,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 00:14:54,619 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2023-11-29 00:14:54,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-29 00:14:54,620 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-29 00:14:54,620 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2023-11-29 00:14:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:54,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:54,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:14:54,621 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)] === [2023-11-29 00:14:54,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1910939013, now seen corresponding path program 1 times [2023-11-29 00:14:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835329187] [2023-11-29 00:14:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:54,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835329187] [2023-11-29 00:14:54,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835329187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:54,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543483582] [2023-11-29 00:14:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:54,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:54,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:54,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:54,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:14:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:14:54,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:54,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:55,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543483582] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:55,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:14:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 00:14:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600921346] [2023-11-29 00:14:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:14:55,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:14:55,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:55,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:14:55,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:14:55,213 INFO L124 PetriNetUnfolderBase]: 896/1342 cut-off events. [2023-11-29 00:14:55,213 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-29 00:14:55,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 1342 events. 896/1342 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5623 event pairs, 253 based on Foata normal form. 0/1280 useless extension candidates. Maximal degree in co-relation 3342. Up to 666 conditions per place. [2023-11-29 00:14:55,223 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-29 00:14:55,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2023-11-29 00:14:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:14:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-29 00:14:55,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-29 00:14:55,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-29 00:14:55,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-29 00:14:55,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:14:55,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-29 00:14:55,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 35.0) internal successors, (210), 6 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,228 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2023-11-29 00:14:55,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2023-11-29 00:14:55,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:14:55,233 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2023-11-29 00:14:55,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-11-29 00:14:55,234 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-29 00:14:55,234 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2023-11-29 00:14:55,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:55,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:55,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:55,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:14:55,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:55,440 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)] === [2023-11-29 00:14:55,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1730873714, now seen corresponding path program 1 times [2023-11-29 00:14:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:55,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416409142] [2023-11-29 00:14:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:56,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416409142] [2023-11-29 00:14:56,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416409142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641540965] [2023-11-29 00:14:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:56,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:56,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:56,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:14:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:56,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:14:56,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:56,437 INFO L378 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 15 treesize of output 1 [2023-11-29 00:14:56,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 55 treesize of output 31 [2023-11-29 00:14:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:56,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:58,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 93 treesize of output 85 [2023-11-29 00:14:58,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:14:58,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 111 [2023-11-29 00:14:59,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2023-11-29 00:14:59,215 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-29 00:14:59,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2023-11-29 00:14:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641540965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:59,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:59,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2023-11-29 00:14:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271556338] [2023-11-29 00:14:59,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:59,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:14:59,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:14:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:14:59,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:14:59,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:14:59,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:59,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:14:59,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:01,706 INFO L124 PetriNetUnfolderBase]: 1993/2999 cut-off events. [2023-11-29 00:15:01,706 INFO L125 PetriNetUnfolderBase]: For 1827/1827 co-relation queries the response was YES. [2023-11-29 00:15:01,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8268 conditions, 2999 events. 1993/2999 cut-off events. For 1827/1827 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13796 event pairs, 122 based on Foata normal form. 1/2998 useless extension candidates. Maximal degree in co-relation 6101. Up to 1481 conditions per place. [2023-11-29 00:15:01,732 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2023-11-29 00:15:01,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2023-11-29 00:15:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:15:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:15:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2023-11-29 00:15:01,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-29 00:15:01,736 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 335 transitions. [2023-11-29 00:15:01,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 335 transitions. [2023-11-29 00:15:01,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:01,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 335 transitions. [2023-11-29 00:15:01,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 15.952380952380953) internal successors, (335), 21 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:01,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:01,742 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 35.0) internal successors, (770), 22 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:01,742 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2023-11-29 00:15:01,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2023-11-29 00:15:01,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:15:01,751 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2023-11-29 00:15:01,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2023-11-29 00:15:01,752 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2023-11-29 00:15:01,753 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2023-11-29 00:15:01,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:01,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:01,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:01,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:15:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:01,959 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)] === [2023-11-29 00:15:01,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -815305122, now seen corresponding path program 2 times [2023-11-29 00:15:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718067211] [2023-11-29 00:15:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:02,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718067211] [2023-11-29 00:15:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718067211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329519879] [2023-11-29 00:15:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:15:02,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:02,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:02,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:15:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:15:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:02,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:15:02,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:02,748 INFO L378 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 15 treesize of output 1 [2023-11-29 00:15:03,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 30 [2023-11-29 00:15:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:03,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:04,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 39 [2023-11-29 00:15:04,008 INFO L378 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 56 treesize of output 50 [2023-11-29 00:15:04,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 65 treesize of output 57 [2023-11-29 00:15:04,027 INFO L378 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 79 treesize of output 71 [2023-11-29 00:15:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329519879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:04,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2023-11-29 00:15:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973428810] [2023-11-29 00:15:04,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:15:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:15:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:15:04,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:15:04,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 547 flow. Second operand has 23 states, 23 states have (on average 8.73913043478261) internal successors, (201), 23 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:04,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:04,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:15:04,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:05,531 INFO L124 PetriNetUnfolderBase]: 2559/4020 cut-off events. [2023-11-29 00:15:05,531 INFO L125 PetriNetUnfolderBase]: For 5797/5797 co-relation queries the response was YES. [2023-11-29 00:15:05,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13261 conditions, 4020 events. 2559/4020 cut-off events. For 5797/5797 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21446 event pairs, 136 based on Foata normal form. 2/3812 useless extension candidates. Maximal degree in co-relation 12229. Up to 2355 conditions per place. [2023-11-29 00:15:05,570 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 177 selfloop transitions, 111 changer transitions 1/294 dead transitions. [2023-11-29 00:15:05,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 294 transitions, 2049 flow [2023-11-29 00:15:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:15:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:15:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 314 transitions. [2023-11-29 00:15:05,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44857142857142857 [2023-11-29 00:15:05,575 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 314 transitions. [2023-11-29 00:15:05,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 314 transitions. [2023-11-29 00:15:05,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:05,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 314 transitions. [2023-11-29 00:15:05,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 15.7) internal successors, (314), 20 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:05,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:05,579 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 35.0) internal successors, (735), 21 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:05,579 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 547 flow. Second operand 20 states and 314 transitions. [2023-11-29 00:15:05,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 294 transitions, 2049 flow [2023-11-29 00:15:05,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 294 transitions, 1847 flow, removed 74 selfloop flow, removed 3 redundant places. [2023-11-29 00:15:05,604 INFO L231 Difference]: Finished difference. Result has 96 places, 175 transitions, 1353 flow [2023-11-29 00:15:05,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1353, PETRI_PLACES=96, PETRI_TRANSITIONS=175} [2023-11-29 00:15:05,605 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 59 predicate places. [2023-11-29 00:15:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 175 transitions, 1353 flow [2023-11-29 00:15:05,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.73913043478261) internal successors, (201), 23 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:05,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:05,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:05,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:15:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:05,807 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)] === [2023-11-29 00:15:05,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1048112956, now seen corresponding path program 3 times [2023-11-29 00:15:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403035756] [2023-11-29 00:15:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403035756] [2023-11-29 00:15:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403035756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647307013] [2023-11-29 00:15:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:15:06,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:06,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:06,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:15:06,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:15:06,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:06,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:15:06,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:06,545 INFO L378 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 15 treesize of output 1 [2023-11-29 00:15:06,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 55 treesize of output 31 [2023-11-29 00:15:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:06,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:07,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 69 treesize of output 61 [2023-11-29 00:15:07,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:15:07,741 INFO L378 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 83 treesize of output 79 [2023-11-29 00:15:07,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 47 [2023-11-29 00:15:07,901 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 00:15:07,902 INFO L378 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 64 treesize of output 1 [2023-11-29 00:15:07,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 66 treesize of output 58 [2023-11-29 00:15:07,919 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 00:15:07,920 INFO L378 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 100 treesize of output 1 [2023-11-29 00:15:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647307013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:07,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2023-11-29 00:15:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876855178] [2023-11-29 00:15:07,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:15:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:15:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:15:08,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:15:08,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 175 transitions, 1353 flow. Second operand has 23 states, 23 states have (on average 9.0) internal successors, (207), 23 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:08,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:08,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:15:08,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:10,221 INFO L124 PetriNetUnfolderBase]: 4104/6126 cut-off events. [2023-11-29 00:15:10,221 INFO L125 PetriNetUnfolderBase]: For 16466/16760 co-relation queries the response was YES. [2023-11-29 00:15:10,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24807 conditions, 6126 events. 4104/6126 cut-off events. For 16466/16760 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32055 event pairs, 428 based on Foata normal form. 178/6229 useless extension candidates. Maximal degree in co-relation 23994. Up to 3907 conditions per place. [2023-11-29 00:15:10,265 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 208 selfloop transitions, 133 changer transitions 2/348 dead transitions. [2023-11-29 00:15:10,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 348 transitions, 3055 flow [2023-11-29 00:15:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:15:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:15:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 298 transitions. [2023-11-29 00:15:10,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481203007518797 [2023-11-29 00:15:10,267 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 298 transitions. [2023-11-29 00:15:10,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 298 transitions. [2023-11-29 00:15:10,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:10,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 298 transitions. [2023-11-29 00:15:10,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 15.68421052631579) internal successors, (298), 19 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:10,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:10,270 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 35.0) internal successors, (700), 20 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:10,270 INFO L175 Difference]: Start difference. First operand has 96 places, 175 transitions, 1353 flow. Second operand 19 states and 298 transitions. [2023-11-29 00:15:10,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 348 transitions, 3055 flow [2023-11-29 00:15:10,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 348 transitions, 3042 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 00:15:10,367 INFO L231 Difference]: Finished difference. Result has 119 places, 249 transitions, 2379 flow [2023-11-29 00:15:10,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2379, PETRI_PLACES=119, PETRI_TRANSITIONS=249} [2023-11-29 00:15:10,368 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 82 predicate places. [2023-11-29 00:15:10,368 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 249 transitions, 2379 flow [2023-11-29 00:15:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.0) internal successors, (207), 23 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:10,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:10,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:10,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:15:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:10,573 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)] === [2023-11-29 00:15:10,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1224342442, now seen corresponding path program 4 times [2023-11-29 00:15:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:10,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171594281] [2023-11-29 00:15:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171594281] [2023-11-29 00:15:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171594281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082722248] [2023-11-29 00:15:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:15:11,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:11,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:11,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:11,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:15:11,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:15:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:11,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:15:11,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:11,246 INFO L378 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 15 treesize of output 1 [2023-11-29 00:15:11,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 55 treesize of output 31 [2023-11-29 00:15:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:11,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:12,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 39 [2023-11-29 00:15:12,357 INFO L378 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 56 treesize of output 50 [2023-11-29 00:15:12,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 65 treesize of output 57 [2023-11-29 00:15:12,373 INFO L378 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 79 treesize of output 71 [2023-11-29 00:15:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:12,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082722248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:12,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:12,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2023-11-29 00:15:12,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335480775] [2023-11-29 00:15:12,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:12,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:15:12,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:15:12,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:15:12,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:15:12,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 249 transitions, 2379 flow. Second operand has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:12,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:12,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:15:12,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:15,423 INFO L124 PetriNetUnfolderBase]: 6139/9194 cut-off events. [2023-11-29 00:15:15,423 INFO L125 PetriNetUnfolderBase]: For 32578/32578 co-relation queries the response was YES. [2023-11-29 00:15:15,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40247 conditions, 9194 events. 6139/9194 cut-off events. For 32578/32578 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52307 event pairs, 485 based on Foata normal form. 2/9196 useless extension candidates. Maximal degree in co-relation 38748. Up to 3023 conditions per place. [2023-11-29 00:15:15,492 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 238 selfloop transitions, 294 changer transitions 1/536 dead transitions. [2023-11-29 00:15:15,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 536 transitions, 5207 flow [2023-11-29 00:15:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 00:15:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 00:15:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 495 transitions. [2023-11-29 00:15:15,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40408163265306124 [2023-11-29 00:15:15,497 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 495 transitions. [2023-11-29 00:15:15,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 495 transitions. [2023-11-29 00:15:15,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:15,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 495 transitions. [2023-11-29 00:15:15,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 14.142857142857142) internal successors, (495), 35 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:15,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:15,502 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 35.0) internal successors, (1260), 36 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:15,502 INFO L175 Difference]: Start difference. First operand has 119 places, 249 transitions, 2379 flow. Second operand 35 states and 495 transitions. [2023-11-29 00:15:15,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 536 transitions, 5207 flow [2023-11-29 00:15:15,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 536 transitions, 5162 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 00:15:15,705 INFO L231 Difference]: Finished difference. Result has 162 places, 348 transitions, 4362 flow [2023-11-29 00:15:15,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4362, PETRI_PLACES=162, PETRI_TRANSITIONS=348} [2023-11-29 00:15:15,707 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2023-11-29 00:15:15,707 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 348 transitions, 4362 flow [2023-11-29 00:15:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.76) internal successors, (194), 25 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:15,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:15,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:15,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:15:15,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:15,908 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)] === [2023-11-29 00:15:15,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 488249358, now seen corresponding path program 5 times [2023-11-29 00:15:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:15,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969587659] [2023-11-29 00:15:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:15,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:16,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969587659] [2023-11-29 00:15:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969587659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:16,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402917301] [2023-11-29 00:15:16,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:15:16,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:16,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:16,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:15:16,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:15:16,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:16,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:15:16,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:16,646 INFO L378 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 15 treesize of output 1 [2023-11-29 00:15:17,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:15:17,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-11-29 00:15:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:17,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:18,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 65 treesize of output 57 [2023-11-29 00:15:18,734 INFO L378 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 79 treesize of output 71 [2023-11-29 00:15:18,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 39 [2023-11-29 00:15:18,799 INFO L378 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 56 treesize of output 50 [2023-11-29 00:15:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402917301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:18,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:18,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 28 [2023-11-29 00:15:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985221429] [2023-11-29 00:15:18,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 00:15:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 00:15:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:15:18,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:15:18,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 348 transitions, 4362 flow. Second operand has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:18,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:18,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:15:18,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:27,587 INFO L124 PetriNetUnfolderBase]: 9970/14426 cut-off events. [2023-11-29 00:15:27,587 INFO L125 PetriNetUnfolderBase]: For 101311/102551 co-relation queries the response was YES. [2023-11-29 00:15:27,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75499 conditions, 14426 events. 9970/14426 cut-off events. For 101311/102551 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 81962 event pairs, 262 based on Foata normal form. 478/14811 useless extension candidates. Maximal degree in co-relation 73910. Up to 4975 conditions per place. [2023-11-29 00:15:27,794 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 342 selfloop transitions, 663 changer transitions 2/1011 dead transitions. [2023-11-29 00:15:27,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1011 transitions, 12827 flow [2023-11-29 00:15:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 00:15:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 00:15:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 716 transitions. [2023-11-29 00:15:27,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011204481792717 [2023-11-29 00:15:27,799 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 716 transitions. [2023-11-29 00:15:27,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 716 transitions. [2023-11-29 00:15:27,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:27,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 716 transitions. [2023-11-29 00:15:27,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 14.03921568627451) internal successors, (716), 51 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:27,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 35.0) internal successors, (1820), 52 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:27,807 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 35.0) internal successors, (1820), 52 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:27,807 INFO L175 Difference]: Start difference. First operand has 162 places, 348 transitions, 4362 flow. Second operand 51 states and 716 transitions. [2023-11-29 00:15:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1011 transitions, 12827 flow [2023-11-29 00:15:28,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1011 transitions, 12165 flow, removed 267 selfloop flow, removed 13 redundant places. [2023-11-29 00:15:28,490 INFO L231 Difference]: Finished difference. Result has 222 places, 749 transitions, 11101 flow [2023-11-29 00:15:28,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=11101, PETRI_PLACES=222, PETRI_TRANSITIONS=749} [2023-11-29 00:15:28,491 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 185 predicate places. [2023-11-29 00:15:28,491 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 749 transitions, 11101 flow [2023-11-29 00:15:28,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:28,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:28,491 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] [2023-11-29 00:15:28,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 00:15:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:28,692 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)] === [2023-11-29 00:15:28,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1065468815, now seen corresponding path program 6 times [2023-11-29 00:15:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:28,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532176991] [2023-11-29 00:15:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:28,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532176991] [2023-11-29 00:15:28,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532176991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:28,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717506647] [2023-11-29 00:15:28,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:15:28,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:28,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:28,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:15:28,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:15:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:28,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:15:28,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:29,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717506647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:29,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-29 00:15:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206975503] [2023-11-29 00:15:29,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:15:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:15:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:15:29,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:15:29,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 749 transitions, 11101 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:29,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:29,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:15:29,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:35,019 INFO L124 PetriNetUnfolderBase]: 15571/22285 cut-off events. [2023-11-29 00:15:35,019 INFO L125 PetriNetUnfolderBase]: For 253118/253118 co-relation queries the response was YES. [2023-11-29 00:15:35,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142662 conditions, 22285 events. 15571/22285 cut-off events. For 253118/253118 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 130151 event pairs, 1570 based on Foata normal form. 368/22653 useless extension candidates. Maximal degree in co-relation 141024. Up to 7189 conditions per place. [2023-11-29 00:15:35,301 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1293 selfloop transitions, 426 changer transitions 0/1720 dead transitions. [2023-11-29 00:15:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1720 transitions, 26788 flow [2023-11-29 00:15:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:15:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 00:15:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 478 transitions. [2023-11-29 00:15:35,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42678571428571427 [2023-11-29 00:15:35,305 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 478 transitions. [2023-11-29 00:15:35,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 478 transitions. [2023-11-29 00:15:35,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:35,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 478 transitions. [2023-11-29 00:15:35,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 14.9375) internal successors, (478), 32 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:35,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:35,310 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 35.0) internal successors, (1155), 33 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:35,310 INFO L175 Difference]: Start difference. First operand has 222 places, 749 transitions, 11101 flow. Second operand 32 states and 478 transitions. [2023-11-29 00:15:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1720 transitions, 26788 flow [2023-11-29 00:15:38,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1720 transitions, 24343 flow, removed 1152 selfloop flow, removed 12 redundant places. [2023-11-29 00:15:38,737 INFO L231 Difference]: Finished difference. Result has 258 places, 1031 transitions, 14848 flow [2023-11-29 00:15:38,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=10365, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14848, PETRI_PLACES=258, PETRI_TRANSITIONS=1031} [2023-11-29 00:15:38,739 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 221 predicate places. [2023-11-29 00:15:38,739 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1031 transitions, 14848 flow [2023-11-29 00:15:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:38,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:38,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2023-11-29 00:15:38,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:15:38,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:15:38,940 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)] === [2023-11-29 00:15:38,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1222213245, now seen corresponding path program 7 times [2023-11-29 00:15:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:38,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197297229] [2023-11-29 00:15:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:39,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197297229] [2023-11-29 00:15:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197297229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262384786] [2023-11-29 00:15:39,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:15:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:39,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:39,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:15:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:39,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:15:39,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:39,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262384786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:39,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:39,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 00:15:39,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585671191] [2023-11-29 00:15:39,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:15:39,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:15:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:15:39,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:15:39,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1031 transitions, 14848 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:39,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:39,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:15:39,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:43,789 INFO L124 PetriNetUnfolderBase]: 10796/16325 cut-off events. [2023-11-29 00:15:43,789 INFO L125 PetriNetUnfolderBase]: For 255914/257481 co-relation queries the response was YES. [2023-11-29 00:15:43,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115578 conditions, 16325 events. 10796/16325 cut-off events. For 255914/257481 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 103951 event pairs, 2315 based on Foata normal form. 939/17137 useless extension candidates. Maximal degree in co-relation 113984. Up to 7006 conditions per place. [2023-11-29 00:15:44,005 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 923 selfloop transitions, 80 changer transitions 0/1055 dead transitions. [2023-11-29 00:15:44,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1055 transitions, 16762 flow [2023-11-29 00:15:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:15:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:15:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-29 00:15:44,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-29 00:15:44,006 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-29 00:15:44,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-29 00:15:44,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:44,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-29 00:15:44,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:44,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:44,007 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:44,007 INFO L175 Difference]: Start difference. First operand has 258 places, 1031 transitions, 14848 flow. Second operand 7 states and 125 transitions. [2023-11-29 00:15:44,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1055 transitions, 16762 flow [2023-11-29 00:15:46,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1055 transitions, 16427 flow, removed 164 selfloop flow, removed 3 redundant places. [2023-11-29 00:15:46,047 INFO L231 Difference]: Finished difference. Result has 262 places, 940 transitions, 13265 flow [2023-11-29 00:15:46,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=13007, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13265, PETRI_PLACES=262, PETRI_TRANSITIONS=940} [2023-11-29 00:15:46,048 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 225 predicate places. [2023-11-29 00:15:46,048 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 940 transitions, 13265 flow [2023-11-29 00:15:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:46,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:46,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2023-11-29 00:15:46,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:15:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:15:46,249 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)] === [2023-11-29 00:15:46,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1791889673, now seen corresponding path program 8 times [2023-11-29 00:15:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:46,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450511057] [2023-11-29 00:15:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:46,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:46,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:46,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450511057] [2023-11-29 00:15:46,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450511057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:46,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48620217] [2023-11-29 00:15:46,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:15:46,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:46,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:46,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:15:46,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:15:46,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:46,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:15:46,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:46,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48620217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:46,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:46,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 00:15:46,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151336968] [2023-11-29 00:15:46,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:15:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:15:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:15:46,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:15:46,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 940 transitions, 13265 flow. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:46,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:46,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:15:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:50,407 INFO L124 PetriNetUnfolderBase]: 8641/13063 cut-off events. [2023-11-29 00:15:50,408 INFO L125 PetriNetUnfolderBase]: For 193726/194665 co-relation queries the response was YES. [2023-11-29 00:15:50,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88625 conditions, 13063 events. 8641/13063 cut-off events. For 193726/194665 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 80672 event pairs, 2019 based on Foata normal form. 872/13799 useless extension candidates. Maximal degree in co-relation 88510. Up to 7085 conditions per place. [2023-11-29 00:15:50,554 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 814 selfloop transitions, 45 changer transitions 3/893 dead transitions. [2023-11-29 00:15:50,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 893 transitions, 13965 flow [2023-11-29 00:15:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:15:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:15:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-29 00:15:50,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-29 00:15:50,556 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-29 00:15:50,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-29 00:15:50,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:50,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-29 00:15:50,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:50,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:50,557 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:50,557 INFO L175 Difference]: Start difference. First operand has 262 places, 940 transitions, 13265 flow. Second operand 7 states and 125 transitions. [2023-11-29 00:15:50,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 893 transitions, 13965 flow [2023-11-29 00:15:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 893 transitions, 13572 flow, removed 85 selfloop flow, removed 12 redundant places. [2023-11-29 00:15:51,934 INFO L231 Difference]: Finished difference. Result has 252 places, 779 transitions, 10611 flow [2023-11-29 00:15:51,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=10448, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10611, PETRI_PLACES=252, PETRI_TRANSITIONS=779} [2023-11-29 00:15:51,935 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 215 predicate places. [2023-11-29 00:15:51,935 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 779 transitions, 10611 flow [2023-11-29 00:15:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:51,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:51,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:51,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:15:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:15:52,136 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)] === [2023-11-29 00:15:52,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash 663750700, now seen corresponding path program 1 times [2023-11-29 00:15:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611580006] [2023-11-29 00:15:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:52,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:52,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611580006] [2023-11-29 00:15:52,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611580006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:52,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173603534] [2023-11-29 00:15:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:52,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:52,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:52,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:15:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:52,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:15:52,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:52,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173603534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:52,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-29 00:15:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109434628] [2023-11-29 00:15:52,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:52,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:15:52,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:15:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:15:52,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2023-11-29 00:15:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 779 transitions, 10611 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2023-11-29 00:15:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:55,255 INFO L124 PetriNetUnfolderBase]: 6506/10089 cut-off events. [2023-11-29 00:15:55,255 INFO L125 PetriNetUnfolderBase]: For 136910/137505 co-relation queries the response was YES. [2023-11-29 00:15:55,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66664 conditions, 10089 events. 6506/10089 cut-off events. For 136910/137505 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 62161 event pairs, 2110 based on Foata normal form. 354/10333 useless extension candidates. Maximal degree in co-relation 65079. Up to 6750 conditions per place. [2023-11-29 00:15:55,356 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 440 selfloop transitions, 3 changer transitions 201/704 dead transitions. [2023-11-29 00:15:55,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 704 transitions, 10654 flow [2023-11-29 00:15:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:15:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:15:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2023-11-29 00:15:55,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-29 00:15:55,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 102 transitions. [2023-11-29 00:15:55,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 102 transitions. [2023-11-29 00:15:55,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:55,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 102 transitions. [2023-11-29 00:15:55,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:55,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:55,359 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:55,359 INFO L175 Difference]: Start difference. First operand has 252 places, 779 transitions, 10611 flow. Second operand 6 states and 102 transitions. [2023-11-29 00:15:55,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 704 transitions, 10654 flow [2023-11-29 00:15:56,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 704 transitions, 10399 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-11-29 00:15:56,308 INFO L231 Difference]: Finished difference. Result has 251 places, 503 transitions, 6200 flow [2023-11-29 00:15:56,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7802, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6200, PETRI_PLACES=251, PETRI_TRANSITIONS=503} [2023-11-29 00:15:56,309 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 214 predicate places. [2023-11-29 00:15:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 503 transitions, 6200 flow [2023-11-29 00:15:56,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:15:56,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:15:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:15:56,510 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)] === [2023-11-29 00:15:56,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1574579190, now seen corresponding path program 9 times [2023-11-29 00:15:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:56,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260905929] [2023-11-29 00:15:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:56,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:15:56,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:56,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260905929] [2023-11-29 00:15:56,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260905929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:56,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321854897] [2023-11-29 00:15:56,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:15:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:56,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:56,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:15:56,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:15:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:56,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:15:56,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:15:56,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:15:57,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321854897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:57,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:57,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:15:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688266653] [2023-11-29 00:15:57,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:57,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:15:57,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:15:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:15:57,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:15:57,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 503 transitions, 6200 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:57,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:57,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:15:57,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:00,712 INFO L124 PetriNetUnfolderBase]: 9990/14480 cut-off events. [2023-11-29 00:16:00,712 INFO L125 PetriNetUnfolderBase]: For 158855/159462 co-relation queries the response was YES. [2023-11-29 00:16:00,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90259 conditions, 14480 events. 9990/14480 cut-off events. For 158855/159462 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 82403 event pairs, 737 based on Foata normal form. 270/14624 useless extension candidates. Maximal degree in co-relation 90178. Up to 5998 conditions per place. [2023-11-29 00:16:00,872 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 872 selfloop transitions, 313 changer transitions 0/1209 dead transitions. [2023-11-29 00:16:00,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1209 transitions, 16762 flow [2023-11-29 00:16:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:16:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 00:16:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2023-11-29 00:16:00,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319327731092437 [2023-11-29 00:16:00,874 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 257 transitions. [2023-11-29 00:16:00,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 257 transitions. [2023-11-29 00:16:00,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:00,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 257 transitions. [2023-11-29 00:16:00,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,876 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,876 INFO L175 Difference]: Start difference. First operand has 251 places, 503 transitions, 6200 flow. Second operand 17 states and 257 transitions. [2023-11-29 00:16:00,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1209 transitions, 16762 flow [2023-11-29 00:16:01,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1209 transitions, 15884 flow, removed 374 selfloop flow, removed 25 redundant places. [2023-11-29 00:16:01,840 INFO L231 Difference]: Finished difference. Result has 202 places, 700 transitions, 9191 flow [2023-11-29 00:16:01,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9191, PETRI_PLACES=202, PETRI_TRANSITIONS=700} [2023-11-29 00:16:01,841 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 165 predicate places. [2023-11-29 00:16:01,841 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 700 transitions, 9191 flow [2023-11-29 00:16:01,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:01,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:16:01,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:16:02,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:16:02,042 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)] === [2023-11-29 00:16:02,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2051296322, now seen corresponding path program 10 times [2023-11-29 00:16:02,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:02,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008959007] [2023-11-29 00:16:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:16:02,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008959007] [2023-11-29 00:16:02,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008959007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:02,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516567588] [2023-11-29 00:16:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:16:02,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:02,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:02,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:02,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:16:02,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:16:02,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:02,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:16:02,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:02,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516567588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:02,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 00:16:02,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530274636] [2023-11-29 00:16:02,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:16:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:16:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:16:02,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:16:02,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 700 transitions, 9191 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:02,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:16:02,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:09,359 INFO L124 PetriNetUnfolderBase]: 17524/24886 cut-off events. [2023-11-29 00:16:09,359 INFO L125 PetriNetUnfolderBase]: For 232708/232708 co-relation queries the response was YES. [2023-11-29 00:16:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156283 conditions, 24886 events. 17524/24886 cut-off events. For 232708/232708 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 143093 event pairs, 557 based on Foata normal form. 32/24918 useless extension candidates. Maximal degree in co-relation 156213. Up to 9407 conditions per place. [2023-11-29 00:16:09,687 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1331 selfloop transitions, 945 changer transitions 0/2277 dead transitions. [2023-11-29 00:16:09,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 2277 transitions, 31505 flow [2023-11-29 00:16:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 00:16:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-11-29 00:16:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 925 transitions. [2023-11-29 00:16:09,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38865546218487396 [2023-11-29 00:16:09,692 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 925 transitions. [2023-11-29 00:16:09,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 925 transitions. [2023-11-29 00:16:09,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:09,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 925 transitions. [2023-11-29 00:16:09,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 13.602941176470589) internal successors, (925), 68 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:09,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 35.0) internal successors, (2415), 69 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:09,703 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 35.0) internal successors, (2415), 69 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:09,703 INFO L175 Difference]: Start difference. First operand has 202 places, 700 transitions, 9191 flow. Second operand 68 states and 925 transitions. [2023-11-29 00:16:09,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 2277 transitions, 31505 flow [2023-11-29 00:16:12,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 2277 transitions, 31020 flow, removed 215 selfloop flow, removed 5 redundant places. [2023-11-29 00:16:12,601 INFO L231 Difference]: Finished difference. Result has 285 places, 1295 transitions, 20215 flow [2023-11-29 00:16:12,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9001, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=20215, PETRI_PLACES=285, PETRI_TRANSITIONS=1295} [2023-11-29 00:16:12,602 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 248 predicate places. [2023-11-29 00:16:12,602 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1295 transitions, 20215 flow [2023-11-29 00:16:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:12,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:12,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:16:12,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:16:12,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:16:12,803 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)] === [2023-11-29 00:16:12,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash 63524922, now seen corresponding path program 11 times [2023-11-29 00:16:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:12,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980831043] [2023-11-29 00:16:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:12,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:16:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980831043] [2023-11-29 00:16:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980831043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84305979] [2023-11-29 00:16:12,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:16:12,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:12,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:12,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:16:13,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:16:13,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:13,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:16:13,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:13,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84305979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:13,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-29 00:16:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584410468] [2023-11-29 00:16:13,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:16:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:16:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:16:13,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:16:13,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1295 transitions, 20215 flow. Second operand has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:13,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:13,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:16:13,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:24,743 INFO L124 PetriNetUnfolderBase]: 21587/30647 cut-off events. [2023-11-29 00:16:24,743 INFO L125 PetriNetUnfolderBase]: For 479895/479895 co-relation queries the response was YES. [2023-11-29 00:16:25,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217262 conditions, 30647 events. 21587/30647 cut-off events. For 479895/479895 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 180650 event pairs, 724 based on Foata normal form. 34/30681 useless extension candidates. Maximal degree in co-relation 217172. Up to 11949 conditions per place. [2023-11-29 00:16:25,207 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1632 selfloop transitions, 1337 changer transitions 0/2970 dead transitions. [2023-11-29 00:16:25,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 2970 transitions, 45259 flow [2023-11-29 00:16:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 00:16:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-11-29 00:16:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1124 transitions. [2023-11-29 00:16:25,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373421926910299 [2023-11-29 00:16:25,345 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 1124 transitions. [2023-11-29 00:16:25,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 1124 transitions. [2023-11-29 00:16:25,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:25,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 1124 transitions. [2023-11-29 00:16:25,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 13.069767441860465) internal successors, (1124), 86 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:25,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 35.0) internal successors, (3045), 87 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:25,354 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 35.0) internal successors, (3045), 87 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:25,355 INFO L175 Difference]: Start difference. First operand has 285 places, 1295 transitions, 20215 flow. Second operand 86 states and 1124 transitions. [2023-11-29 00:16:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 2970 transitions, 45259 flow [2023-11-29 00:16:36,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 2970 transitions, 43562 flow, removed 753 selfloop flow, removed 6 redundant places. [2023-11-29 00:16:36,416 INFO L231 Difference]: Finished difference. Result has 379 places, 1653 transitions, 27892 flow [2023-11-29 00:16:36,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=19196, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=985, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=27892, PETRI_PLACES=379, PETRI_TRANSITIONS=1653} [2023-11-29 00:16:36,417 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 342 predicate places. [2023-11-29 00:16:36,418 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1653 transitions, 27892 flow [2023-11-29 00:16:36,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.888888888888889) internal successors, (124), 18 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:36,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:36,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:16:36,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:16:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:16:36,619 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)] === [2023-11-29 00:16:36,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -998565114, now seen corresponding path program 12 times [2023-11-29 00:16:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:36,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018063861] [2023-11-29 00:16:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:16:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018063861] [2023-11-29 00:16:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018063861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852195323] [2023-11-29 00:16:36,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:16:36,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:36,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:36,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:16:36,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:16:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:36,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:16:36,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:36,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:16:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852195323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:37,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-29 00:16:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776747326] [2023-11-29 00:16:37,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:16:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:16:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:16:37,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:16:37,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1653 transitions, 27892 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:37,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:37,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:16:37,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:53,655 INFO L124 PetriNetUnfolderBase]: 28100/39964 cut-off events. [2023-11-29 00:16:53,656 INFO L125 PetriNetUnfolderBase]: For 824657/824657 co-relation queries the response was YES. [2023-11-29 00:16:54,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301125 conditions, 39964 events. 28100/39964 cut-off events. For 824657/824657 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 241776 event pairs, 1155 based on Foata normal form. 32/39996 useless extension candidates. Maximal degree in co-relation 301021. Up to 15807 conditions per place. [2023-11-29 00:16:54,409 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 946 selfloop transitions, 1666 changer transitions 0/2613 dead transitions. [2023-11-29 00:16:54,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2613 transitions, 46673 flow [2023-11-29 00:16:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:16:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 00:16:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 492 transitions. [2023-11-29 00:16:54,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699248120300752 [2023-11-29 00:16:54,412 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 492 transitions. [2023-11-29 00:16:54,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 492 transitions. [2023-11-29 00:16:54,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:54,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 492 transitions. [2023-11-29 00:16:54,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 12.947368421052632) internal successors, (492), 38 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,416 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 35.0) internal successors, (1365), 39 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,417 INFO L175 Difference]: Start difference. First operand has 379 places, 1653 transitions, 27892 flow. Second operand 38 states and 492 transitions. [2023-11-29 00:16:54,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2613 transitions, 46673 flow [2023-11-29 00:17:14,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2613 transitions, 44710 flow, removed 424 selfloop flow, removed 11 redundant places. [2023-11-29 00:17:14,912 INFO L231 Difference]: Finished difference. Result has 423 places, 2111 transitions, 39972 flow [2023-11-29 00:17:14,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=26439, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=39972, PETRI_PLACES=423, PETRI_TRANSITIONS=2111} [2023-11-29 00:17:14,914 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 386 predicate places. [2023-11-29 00:17:14,914 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 2111 transitions, 39972 flow [2023-11-29 00:17:14,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:14,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:17:14,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:17:14,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:17:15,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:17:15,115 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)] === [2023-11-29 00:17:15,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:15,115 INFO L85 PathProgramCache]: Analyzing trace with hash 278544304, now seen corresponding path program 13 times [2023-11-29 00:17:15,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:15,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349903885] [2023-11-29 00:17:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:17:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349903885] [2023-11-29 00:17:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349903885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:17:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948047226] [2023-11-29 00:17:15,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:17:15,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:17:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:17:15,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:17:15,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:17:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:15,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:17:15,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:17:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:17:15,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:17:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948047226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:15,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:17:15,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 00:17:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448138304] [2023-11-29 00:17:15,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:15,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:17:15,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:17:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:17:15,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:17:15,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 2111 transitions, 39972 flow. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:15,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:17:15,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:17:15,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:17:40,101 INFO L124 PetriNetUnfolderBase]: 34425/49332 cut-off events. [2023-11-29 00:17:40,101 INFO L125 PetriNetUnfolderBase]: For 1270743/1271769 co-relation queries the response was YES. [2023-11-29 00:17:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394822 conditions, 49332 events. 34425/49332 cut-off events. For 1270743/1271769 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 318433 event pairs, 1409 based on Foata normal form. 568/49608 useless extension candidates. Maximal degree in co-relation 394700. Up to 21785 conditions per place. [2023-11-29 00:17:41,079 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 2204 selfloop transitions, 1321 changer transitions 0/3549 dead transitions. [2023-11-29 00:17:41,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 3549 transitions, 68324 flow [2023-11-29 00:17:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:17:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 00:17:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 621 transitions. [2023-11-29 00:17:41,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953667953667956 [2023-11-29 00:17:41,081 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 621 transitions. [2023-11-29 00:17:41,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 621 transitions. [2023-11-29 00:17:41,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:17:41,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 621 transitions. [2023-11-29 00:17:41,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 16.783783783783782) internal successors, (621), 37 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:41,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:41,084 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 35.0) internal successors, (1330), 38 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:41,084 INFO L175 Difference]: Start difference. First operand has 423 places, 2111 transitions, 39972 flow. Second operand 37 states and 621 transitions. [2023-11-29 00:17:41,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 3549 transitions, 68324 flow [2023-11-29 00:18:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 3549 transitions, 66613 flow, removed 523 selfloop flow, removed 10 redundant places. [2023-11-29 00:18:28,748 INFO L231 Difference]: Finished difference. Result has 456 places, 2457 transitions, 49587 flow [2023-11-29 00:18:28,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=38897, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=49587, PETRI_PLACES=456, PETRI_TRANSITIONS=2457} [2023-11-29 00:18:28,750 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 419 predicate places. [2023-11-29 00:18:28,750 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 2457 transitions, 49587 flow [2023-11-29 00:18:28,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:18:28,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:18:28,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:18:28,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:18:28,951 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)] === [2023-11-29 00:18:28,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 469009802, now seen corresponding path program 14 times [2023-11-29 00:18:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979577638] [2023-11-29 00:18:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:18:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979577638] [2023-11-29 00:18:29,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979577638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:18:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296071091] [2023-11-29 00:18:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:18:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:29,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:29,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:18:29,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:18:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:18:29,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:18:29,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:18:29,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:18:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296071091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:18:29,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:18:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 00:18:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843265912] [2023-11-29 00:18:29,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:29,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:18:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:18:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:18:29,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:18:29,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 2457 transitions, 49587 flow. Second operand has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:29,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:18:29,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:18:29,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:19:01,677 INFO L124 PetriNetUnfolderBase]: 42553/60646 cut-off events. [2023-11-29 00:19:01,677 INFO L125 PetriNetUnfolderBase]: For 1601767/1603097 co-relation queries the response was YES. [2023-11-29 00:19:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498423 conditions, 60646 events. 42553/60646 cut-off events. For 1601767/1603097 co-relation queries the response was YES. Maximal size of possible extension queue 1825. Compared 396372 event pairs, 794 based on Foata normal form. 809/61147 useless extension candidates. Maximal degree in co-relation 498294. Up to 26957 conditions per place. [2023-11-29 00:19:02,863 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 2009 selfloop transitions, 1785 changer transitions 0/3818 dead transitions. [2023-11-29 00:19:02,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 3818 transitions, 77661 flow [2023-11-29 00:19:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:19:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 00:19:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 716 transitions. [2023-11-29 00:19:02,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48707482993197276 [2023-11-29 00:19:02,864 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 716 transitions. [2023-11-29 00:19:02,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 716 transitions. [2023-11-29 00:19:02,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:19:02,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 716 transitions. [2023-11-29 00:19:02,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 17.047619047619047) internal successors, (716), 42 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:19:02,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:19:02,868 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 35.0) internal successors, (1505), 43 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:19:02,868 INFO L175 Difference]: Start difference. First operand has 456 places, 2457 transitions, 49587 flow. Second operand 42 states and 716 transitions. [2023-11-29 00:19:02,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 3818 transitions, 77661 flow [2023-11-29 00:20:07,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 3818 transitions, 73168 flow, removed 766 selfloop flow, removed 22 redundant places. [2023-11-29 00:20:07,410 INFO L231 Difference]: Finished difference. Result has 477 places, 2817 transitions, 57980 flow [2023-11-29 00:20:07,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=46309, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1016, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=57980, PETRI_PLACES=477, PETRI_TRANSITIONS=2817} [2023-11-29 00:20:07,412 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 440 predicate places. [2023-11-29 00:20:07,412 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 2817 transitions, 57980 flow [2023-11-29 00:20:07,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:20:07,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:20:07,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:20:07,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:20:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:07,613 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)] === [2023-11-29 00:20:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1005478678, now seen corresponding path program 15 times [2023-11-29 00:20:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546287591] [2023-11-29 00:20:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:20:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546287591] [2023-11-29 00:20:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546287591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:20:07,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651887058] [2023-11-29 00:20:07,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:20:07,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:07,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:07,735 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:07,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:20:07,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:20:07,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:20:07,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:20:07,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:20:07,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:20:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651887058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:08,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:20:08,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 00:20:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199935854] [2023-11-29 00:20:08,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:20:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:20:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:20:08,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:20:08,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 2817 transitions, 57980 flow. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:20:08,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:20:08,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:20:08,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:20:41,423 INFO L124 PetriNetUnfolderBase]: 43531/62158 cut-off events. [2023-11-29 00:20:41,423 INFO L125 PetriNetUnfolderBase]: For 1045809/1047025 co-relation queries the response was YES. [2023-11-29 00:20:42,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476699 conditions, 62158 events. 43531/62158 cut-off events. For 1045809/1047025 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 410527 event pairs, 2838 based on Foata normal form. 704/62526 useless extension candidates. Maximal degree in co-relation 476579. Up to 27725 conditions per place. [2023-11-29 00:20:42,570 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 1561 selfloop transitions, 1871 changer transitions 0/3456 dead transitions. [2023-11-29 00:20:42,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 3456 transitions, 73461 flow [2023-11-29 00:20:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:20:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:20:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 275 transitions. [2023-11-29 00:20:42,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-11-29 00:20:42,572 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 275 transitions. [2023-11-29 00:20:42,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 275 transitions. [2023-11-29 00:20:42,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:20:42,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 275 transitions. [2023-11-29 00:20:42,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:20:42,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:20:42,574 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 35.0) internal successors, (665), 19 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:20:42,574 INFO L175 Difference]: Start difference. First operand has 477 places, 2817 transitions, 57980 flow. Second operand 18 states and 275 transitions. [2023-11-29 00:20:42,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 3456 transitions, 73461 flow [2023-11-29 00:21:23,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 3456 transitions, 71190 flow, removed 194 selfloop flow, removed 15 redundant places. [2023-11-29 00:21:23,864 INFO L231 Difference]: Finished difference. Result has 483 places, 2923 transitions, 64253 flow [2023-11-29 00:21:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=55872, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=64253, PETRI_PLACES=483, PETRI_TRANSITIONS=2923} [2023-11-29 00:21:23,867 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 446 predicate places. [2023-11-29 00:21:23,867 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 2923 transitions, 64253 flow [2023-11-29 00:21:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 19 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:21:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:21:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:21:23,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:21:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:24,068 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)] === [2023-11-29 00:21:24,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -80203640, now seen corresponding path program 16 times [2023-11-29 00:21:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:24,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897927057] [2023-11-29 00:21:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:21:24,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:24,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897927057] [2023-11-29 00:21:24,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897927057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:21:24,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008386530] [2023-11-29 00:21:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:21:24,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:24,200 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:24,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:21:24,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:21:24,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:21:24,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:21:24,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:21:24,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:21:24,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008386530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:24,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:21:24,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-29 00:21:24,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524274306] [2023-11-29 00:21:24,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:24,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:21:24,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:21:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:21:24,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:21:24,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 2923 transitions, 64253 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:21:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:21:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:21:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:22:07,023 INFO L124 PetriNetUnfolderBase]: 48545/68338 cut-off events. [2023-11-29 00:22:07,023 INFO L125 PetriNetUnfolderBase]: For 1255077/1255077 co-relation queries the response was YES. [2023-11-29 00:22:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536531 conditions, 68338 events. 48545/68338 cut-off events. For 1255077/1255077 co-relation queries the response was YES. Maximal size of possible extension queue 1875. Compared 434718 event pairs, 1918 based on Foata normal form. 34/68372 useless extension candidates. Maximal degree in co-relation 536411. Up to 27559 conditions per place. [2023-11-29 00:22:08,455 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1575 selfloop transitions, 2801 changer transitions 0/4377 dead transitions. [2023-11-29 00:22:08,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 4377 transitions, 89367 flow [2023-11-29 00:22:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 00:22:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-29 00:22:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 961 transitions. [2023-11-29 00:22:08,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38672032193158956 [2023-11-29 00:22:08,459 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 961 transitions. [2023-11-29 00:22:08,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 961 transitions. [2023-11-29 00:22:08,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:22:08,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 961 transitions. [2023-11-29 00:22:08,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 13.535211267605634) internal successors, (961), 71 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:08,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 35.0) internal successors, (2520), 72 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:08,466 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 35.0) internal successors, (2520), 72 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:08,467 INFO L175 Difference]: Start difference. First operand has 483 places, 2923 transitions, 64253 flow. Second operand 71 states and 961 transitions. [2023-11-29 00:22:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 4377 transitions, 89367 flow [2023-11-29 00:22:53,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 4377 transitions, 89192 flow, removed 84 selfloop flow, removed 4 redundant places. [2023-11-29 00:22:53,696 INFO L231 Difference]: Finished difference. Result has 561 places, 3154 transitions, 74868 flow [2023-11-29 00:22:53,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64100, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=74868, PETRI_PLACES=561, PETRI_TRANSITIONS=3154} [2023-11-29 00:22:53,699 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 524 predicate places. [2023-11-29 00:22:53,700 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 3154 transitions, 74868 flow [2023-11-29 00:22:53,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:53,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:22:53,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:22:53,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:22:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:53,901 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)] === [2023-11-29 00:22:53,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1884254596, now seen corresponding path program 17 times [2023-11-29 00:22:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771498832] [2023-11-29 00:22:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:22:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771498832] [2023-11-29 00:22:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771498832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102377372] [2023-11-29 00:22:54,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:22:54,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:54,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:54,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:54,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:22:54,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:22:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:54,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:22:54,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:22:54,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:22:54,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102377372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:54,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:54,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 00:22:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015548399] [2023-11-29 00:22:54,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:22:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:22:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:22:54,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2023-11-29 00:22:54,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 3154 transitions, 74868 flow. Second operand has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:54,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:22:54,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2023-11-29 00:22:54,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:23:43,035 INFO L124 PetriNetUnfolderBase]: 49773/70063 cut-off events. [2023-11-29 00:23:43,035 INFO L125 PetriNetUnfolderBase]: For 1570280/1570280 co-relation queries the response was YES. [2023-11-29 00:23:44,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587196 conditions, 70063 events. 49773/70063 cut-off events. For 1570280/1570280 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 448044 event pairs, 2407 based on Foata normal form. 32/70095 useless extension candidates. Maximal degree in co-relation 587064. Up to 28225 conditions per place. [2023-11-29 00:23:44,470 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1808 selfloop transitions, 2285 changer transitions 0/4094 dead transitions. [2023-11-29 00:23:44,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 4094 transitions, 93580 flow [2023-11-29 00:23:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:23:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 00:23:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 648 transitions. [2023-11-29 00:23:44,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939209726443769 [2023-11-29 00:23:44,471 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 648 transitions. [2023-11-29 00:23:44,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 648 transitions. [2023-11-29 00:23:44,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:23:44,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 648 transitions. [2023-11-29 00:23:44,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 13.787234042553191) internal successors, (648), 47 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:44,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:44,475 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 35.0) internal successors, (1680), 48 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:44,475 INFO L175 Difference]: Start difference. First operand has 561 places, 3154 transitions, 74868 flow. Second operand 47 states and 648 transitions. [2023-11-29 00:23:44,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 4094 transitions, 93580 flow [2023-11-29 00:24:47,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 4094 transitions, 90926 flow, removed 375 selfloop flow, removed 17 redundant places. [2023-11-29 00:24:47,084 INFO L231 Difference]: Finished difference. Result has 599 places, 3267 transitions, 80591 flow [2023-11-29 00:24:47,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=72101, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=935, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=80591, PETRI_PLACES=599, PETRI_TRANSITIONS=3267} [2023-11-29 00:24:47,087 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 562 predicate places. [2023-11-29 00:24:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 3267 transitions, 80591 flow [2023-11-29 00:24:47,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7368421052631575) internal successors, (128), 19 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:47,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:24:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-11-29 00:24:47,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:24:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:47,288 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)] === [2023-11-29 00:24:47,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -64373642, now seen corresponding path program 2 times [2023-11-29 00:24:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029929363] [2023-11-29 00:24:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:24:49,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029929363] [2023-11-29 00:24:49,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029929363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317703406] [2023-11-29 00:24:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:24:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:49,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:49,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c834b3-3f9d-4411-b493-bb7609707c36/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:24:49,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:24:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:49,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 00:24:49,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:50,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:24:50,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 77 [2023-11-29 00:24:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:24:50,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:51,890 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 00:24:51,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 161 [2023-11-29 00:24:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:24:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317703406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:53,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2023-11-29 00:24:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876186963] [2023-11-29 00:24:53,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:53,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:24:53,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:24:53,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:24:53,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2023-11-29 00:24:53,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 3267 transitions, 80591 flow. Second operand has 43 states, 43 states have (on average 7.093023255813954) internal successors, (305), 43 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:53,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:24:53,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2023-11-29 00:24:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:26:23,370 INFO L124 PetriNetUnfolderBase]: 66981/97656 cut-off events. [2023-11-29 00:26:23,371 INFO L125 PetriNetUnfolderBase]: For 2060598/2064231 co-relation queries the response was YES. [2023-11-29 00:26:24,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828037 conditions, 97656 events. 66981/97656 cut-off events. For 2060598/2064231 co-relation queries the response was YES. Maximal size of possible extension queue 2987. Compared 710493 event pairs, 3581 based on Foata normal form. 633/97786 useless extension candidates. Maximal degree in co-relation 827900. Up to 67195 conditions per place. [2023-11-29 00:26:25,674 INFO L140 encePairwiseOnDemand]: 17/35 looper letters, 4875 selfloop transitions, 2119 changer transitions 2/7316 dead transitions. [2023-11-29 00:26:25,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 7316 transitions, 168186 flow [2023-11-29 00:26:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-11-29 00:26:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2023-11-29 00:26:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 1972 transitions. [2023-11-29 00:26:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806949806949807 [2023-11-29 00:26:25,677 INFO L72 ComplementDD]: Start complementDD. Operand 148 states and 1972 transitions. [2023-11-29 00:26:25,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 148 states and 1972 transitions. [2023-11-29 00:26:25,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:26:25,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 148 states and 1972 transitions. [2023-11-29 00:26:25,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 149 states, 148 states have (on average 13.324324324324325) internal successors, (1972), 148 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:25,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 149 states, 149 states have (on average 35.0) internal successors, (5215), 149 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:25,689 INFO L81 ComplementDD]: Finished complementDD. Result has 149 states, 149 states have (on average 35.0) internal successors, (5215), 149 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:25,689 INFO L175 Difference]: Start difference. First operand has 599 places, 3267 transitions, 80591 flow. Second operand 148 states and 1972 transitions. [2023-11-29 00:26:25,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 7316 transitions, 168186 flow