./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:58:58,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:58:58,221 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:58:58,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:58:58,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:58:58,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:58:58,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:58:58,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:58:58,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:58:58,250 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:58:58,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:58:58,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:58:58,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:58:58,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:58:58,253 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:58:58,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:58:58,254 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:58:58,254 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:58:58,255 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:58:58,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:58:58,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:58:58,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:58:58,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:58:58,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:58:58,258 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:58:58,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:58:58,259 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:58:58,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:58:58,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:58:58,260 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:58:58,260 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:58:58,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:58:58,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:58:58,261 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:58:58,261 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:58:58,262 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:58:58,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:58:58,263 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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2023-11-29 06:58:58,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:58:58,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:58:58,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:58:58,480 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:58:58,481 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:58:58,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-29 06:59:01,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:59:01,476 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:59:01,477 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-29 06:59:01,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/data/2049e371a/4612d15815b14479a842e66310faab68/FLAG84ca2fb6f [2023-11-29 06:59:01,828 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/data/2049e371a/4612d15815b14479a842e66310faab68 [2023-11-29 06:59:01,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:59:01,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:59:01,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:59:01,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:59:01,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:59:01,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:59:01" (1/1) ... [2023-11-29 06:59:01,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15752842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:01, skipping insertion in model container [2023-11-29 06:59:01,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:59:01" (1/1) ... [2023-11-29 06:59:01,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:59:02,037 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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-29 06:59:02,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:59:02,058 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:59:02,083 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_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-29 06:59:02,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:59:02,094 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:59:02,095 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:59:02,101 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:59:02,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02 WrapperNode [2023-11-29 06:59:02,102 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:59:02,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:59:02,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:59:02,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:59:02,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,149 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 330 [2023-11-29 06:59:02,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:59:02,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:59:02,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:59:02,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:59:02,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,188 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 2, 10, 2]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 3, 1]. [2023-11-29 06:59:02,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,199 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,204 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:59:02,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:59:02,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:59:02,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:59:02,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (1/1) ... [2023-11-29 06:59:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:59:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:02,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:59:02,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:59:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:59:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:59:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:59:02,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:59:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:59:02,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:59:02,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:59:02,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:59:02,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:59:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:59:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:59:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:59:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:59:02,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:59:02,284 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 06:59:02,410 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:59:02,413 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:59:02,843 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:59:03,227 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:59:03,228 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 06:59:03,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:59:03 BoogieIcfgContainer [2023-11-29 06:59:03,228 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:59:03,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:59:03,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:59:03,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:59:03,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:59:01" (1/3) ... [2023-11-29 06:59:03,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c276aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:59:03, skipping insertion in model container [2023-11-29 06:59:03,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:59:02" (2/3) ... [2023-11-29 06:59:03,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c276aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:59:03, skipping insertion in model container [2023-11-29 06:59:03,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:59:03" (3/3) ... [2023-11-29 06:59:03,237 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-11-29 06:59:03,246 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:59:03,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:59:03,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:59:03,257 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:59:03,320 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:59:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 121 flow [2023-11-29 06:59:03,430 INFO L124 PetriNetUnfolderBase]: 8/47 cut-off events. [2023-11-29 06:59:03,430 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:59:03,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 8/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 06:59:03,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 121 flow [2023-11-29 06:59:03,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 110 flow [2023-11-29 06:59:03,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:59:03,458 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;@7f2e0f5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:59:03,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 06:59:03,482 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:59:03,482 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2023-11-29 06:59:03,482 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:59:03,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:03,483 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] [2023-11-29 06:59:03,484 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 06:59:03,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 688973113, now seen corresponding path program 1 times [2023-11-29 06:59:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782690625] [2023-11-29 06:59:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:03,789 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 06:59:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:03,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782690625] [2023-11-29 06:59:03,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782690625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:03,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:03,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:59:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37054001] [2023-11-29 06:59:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:03,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:59:03,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:59:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:59:03,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:03,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 06:59:03,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:03,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:03,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:04,199 INFO L124 PetriNetUnfolderBase]: 1093/1873 cut-off events. [2023-11-29 06:59:04,199 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-29 06:59:04,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 1873 events. 1093/1873 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9978 event pairs, 902 based on Foata normal form. 176/1864 useless extension candidates. Maximal degree in co-relation 3107. Up to 1468 conditions per place. [2023-11-29 06:59:04,218 INFO L140 encePairwiseOnDemand]: 48/50 looper letters, 34 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-11-29 06:59:04,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 174 flow [2023-11-29 06:59:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:59:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 06:59:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2023-11-29 06:59:04,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-29 06:59:04,229 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 62 transitions. [2023-11-29 06:59:04,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 62 transitions. [2023-11-29 06:59:04,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:04,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 62 transitions. [2023-11-29 06:59:04,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 06:59:04,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 06:59:04,236 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 06:59:04,238 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 110 flow. Second operand 2 states and 62 transitions. [2023-11-29 06:59:04,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 174 flow [2023-11-29 06:59:04,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:59:04,247 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 94 flow [2023-11-29 06:59:04,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-29 06:59:04,252 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-11-29 06:59:04,252 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 94 flow [2023-11-29 06:59:04,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 06:59:04,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:04,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:59:04,253 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 06:59:04,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash -108023975, now seen corresponding path program 1 times [2023-11-29 06:59:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591480400] [2023-11-29 06:59:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:04,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:04,422 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 06:59:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591480400] [2023-11-29 06:59:04,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591480400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:04,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:04,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:59:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026186114] [2023-11-29 06:59:04,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:04,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:59:04,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:59:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:59:04,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:04,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:04,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:04,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:04,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:04,666 INFO L124 PetriNetUnfolderBase]: 1084/1806 cut-off events. [2023-11-29 06:59:04,666 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 06:59:04,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 1806 events. 1084/1806 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9161 event pairs, 281 based on Foata normal form. 33/1736 useless extension candidates. Maximal degree in co-relation 3368. Up to 1325 conditions per place. [2023-11-29 06:59:04,678 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 44 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-11-29 06:59:04,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 216 flow [2023-11-29 06:59:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:59:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:59:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-29 06:59:04,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2023-11-29 06:59:04,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-29 06:59:04,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-29 06:59:04,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:04,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-29 06:59:04,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 06:59:04,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:04,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:04,684 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 94 flow. Second operand 3 states and 87 transitions. [2023-11-29 06:59:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 216 flow [2023-11-29 06:59:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:59:04,686 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 113 flow [2023-11-29 06:59:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-11-29 06:59:04,687 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2023-11-29 06:59:04,687 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 113 flow [2023-11-29 06:59:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:04,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:59:04,688 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 06:59:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 163294151, now seen corresponding path program 2 times [2023-11-29 06:59:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184979861] [2023-11-29 06:59:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:04,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:04,801 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 06:59:04,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184979861] [2023-11-29 06:59:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184979861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:04,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:59:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601659716] [2023-11-29 06:59:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:59:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:59:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:59:04,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:04,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:04,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:04,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:05,055 INFO L124 PetriNetUnfolderBase]: 914/1637 cut-off events. [2023-11-29 06:59:05,055 INFO L125 PetriNetUnfolderBase]: For 246/248 co-relation queries the response was YES. [2023-11-29 06:59:05,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1637 events. 914/1637 cut-off events. For 246/248 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8533 event pairs, 331 based on Foata normal form. 35/1556 useless extension candidates. Maximal degree in co-relation 3288. Up to 847 conditions per place. [2023-11-29 06:59:05,066 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-29 06:59:05,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 249 flow [2023-11-29 06:59:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:59:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:59:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 06:59:05,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2023-11-29 06:59:05,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 06:59:05,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 06:59:05,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:05,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 06:59:05,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 06:59:05,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,071 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 113 flow. Second operand 3 states and 88 transitions. [2023-11-29 06:59:05,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 249 flow [2023-11-29 06:59:05,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:59:05,073 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 122 flow [2023-11-29 06:59:05,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-29 06:59:05,074 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-11-29 06:59:05,075 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 122 flow [2023-11-29 06:59:05,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:05,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:05,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:59:05,076 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 06:59:05,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1752692839, now seen corresponding path program 3 times [2023-11-29 06:59:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511045866] [2023-11-29 06:59:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,157 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 06:59:05,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:05,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511045866] [2023-11-29 06:59:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511045866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:05,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:05,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:59:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364516720] [2023-11-29 06:59:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:59:05,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:59:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:59:05,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:05,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:05,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:05,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:05,556 INFO L124 PetriNetUnfolderBase]: 1402/2350 cut-off events. [2023-11-29 06:59:05,556 INFO L125 PetriNetUnfolderBase]: For 507/535 co-relation queries the response was YES. [2023-11-29 06:59:05,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5223 conditions, 2350 events. 1402/2350 cut-off events. For 507/535 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13329 event pairs, 461 based on Foata normal form. 1/2245 useless extension candidates. Maximal degree in co-relation 5217. Up to 1241 conditions per place. [2023-11-29 06:59:05,575 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 50 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2023-11-29 06:59:05,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 302 flow [2023-11-29 06:59:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:59:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:59:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-29 06:59:05,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2023-11-29 06:59:05,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-29 06:59:05,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-29 06:59:05,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:05,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-29 06:59:05,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 06:59:05,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,580 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 122 flow. Second operand 3 states and 98 transitions. [2023-11-29 06:59:05,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 302 flow [2023-11-29 06:59:05,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:59:05,583 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 128 flow [2023-11-29 06:59:05,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-29 06:59:05,584 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-11-29 06:59:05,584 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 128 flow [2023-11-29 06:59:05,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 06:59:05,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:05,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:05,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:59:05,586 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 06:59:05,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:05,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1591027075, now seen corresponding path program 1 times [2023-11-29 06:59:05,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:05,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941312186] [2023-11-29 06:59:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941312186] [2023-11-29 06:59:05,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941312186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:05,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:05,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:59:05,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519629046] [2023-11-29 06:59:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:05,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:59:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:59:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:59:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:05,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 06:59:05,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:05,910 INFO L124 PetriNetUnfolderBase]: 517/859 cut-off events. [2023-11-29 06:59:05,910 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-29 06:59:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 859 events. 517/859 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4025 event pairs, 198 based on Foata normal form. 44/858 useless extension candidates. Maximal degree in co-relation 1959. Up to 579 conditions per place. [2023-11-29 06:59:05,917 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 41 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2023-11-29 06:59:05,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 236 flow [2023-11-29 06:59:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:59:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:59:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-29 06:59:05,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2023-11-29 06:59:05,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-29 06:59:05,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-29 06:59:05,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:05,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-29 06:59:05,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 06:59:05,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:59:05,920 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 128 flow. Second operand 3 states and 82 transitions. [2023-11-29 06:59:05,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 236 flow [2023-11-29 06:59:05,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 232 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:59:05,923 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 136 flow [2023-11-29 06:59:05,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-29 06:59:05,924 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-11-29 06:59:05,924 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 136 flow [2023-11-29 06:59:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 06:59:05,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:05,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:05,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:59:05,925 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 06:59:05,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:05,925 INFO L85 PathProgramCache]: Analyzing trace with hash 309332853, now seen corresponding path program 2 times [2023-11-29 06:59:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:05,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677799653] [2023-11-29 06:59:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:06,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:06,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677799653] [2023-11-29 06:59:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677799653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:06,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:59:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083168588] [2023-11-29 06:59:06,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:06,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:59:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:59:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:59:06,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:06,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:59:06,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:06,290 INFO L124 PetriNetUnfolderBase]: 566/965 cut-off events. [2023-11-29 06:59:06,290 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2023-11-29 06:59:06,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 965 events. 566/965 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4573 event pairs, 425 based on Foata normal form. 13/925 useless extension candidates. Maximal degree in co-relation 2256. Up to 778 conditions per place. [2023-11-29 06:59:06,296 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 37 selfloop transitions, 2 changer transitions 15/64 dead transitions. [2023-11-29 06:59:06,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 279 flow [2023-11-29 06:59:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:59:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:59:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2023-11-29 06:59:06,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464 [2023-11-29 06:59:06,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 116 transitions. [2023-11-29 06:59:06,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 116 transitions. [2023-11-29 06:59:06,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:06,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 116 transitions. [2023-11-29 06:59:06,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 06:59:06,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 06:59:06,300 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 50.0) internal successors, (300), 6 states have internal predecessors, (300), 0 states have call successors, (0), 0 states 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 06:59:06,300 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 136 flow. Second operand 5 states and 116 transitions. [2023-11-29 06:59:06,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 279 flow [2023-11-29 06:59:06,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:59:06,303 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 150 flow [2023-11-29 06:59:06,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-11-29 06:59:06,304 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2023-11-29 06:59:06,304 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 150 flow [2023-11-29 06:59:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:59:06,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:06,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:59:06,305 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 06:59:06,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 629336987, now seen corresponding path program 1 times [2023-11-29 06:59:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342179069] [2023-11-29 06:59:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:06,484 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 06:59:06,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342179069] [2023-11-29 06:59:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342179069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:06,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:59:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6620041] [2023-11-29 06:59:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:59:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:59:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:59:06,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:06,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 06:59:06,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:06,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:06,680 INFO L124 PetriNetUnfolderBase]: 591/1014 cut-off events. [2023-11-29 06:59:06,680 INFO L125 PetriNetUnfolderBase]: For 336/336 co-relation queries the response was YES. [2023-11-29 06:59:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 1014 events. 591/1014 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4912 event pairs, 451 based on Foata normal form. 6/968 useless extension candidates. Maximal degree in co-relation 2403. Up to 779 conditions per place. [2023-11-29 06:59:06,687 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 38 selfloop transitions, 2 changer transitions 15/65 dead transitions. [2023-11-29 06:59:06,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 303 flow [2023-11-29 06:59:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:59:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:59:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2023-11-29 06:59:06,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-29 06:59:06,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 103 transitions. [2023-11-29 06:59:06,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 103 transitions. [2023-11-29 06:59:06,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:06,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 103 transitions. [2023-11-29 06:59:06,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 06:59:06,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 06:59:06,691 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 06:59:06,691 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 150 flow. Second operand 4 states and 103 transitions. [2023-11-29 06:59:06,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 303 flow [2023-11-29 06:59:06,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 291 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 06:59:06,694 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 156 flow [2023-11-29 06:59:06,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-29 06:59:06,695 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2023-11-29 06:59:06,695 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 156 flow [2023-11-29 06:59:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 06:59:06,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:06,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:59:06,696 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 06:59:06,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 633039931, now seen corresponding path program 1 times [2023-11-29 06:59:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:06,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343873120] [2023-11-29 06:59:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:06,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343873120] [2023-11-29 06:59:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343873120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:06,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:06,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:59:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366682307] [2023-11-29 06:59:06,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:06,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:59:06,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:59:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:59:06,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:59:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:07,084 INFO L124 PetriNetUnfolderBase]: 623/1102 cut-off events. [2023-11-29 06:59:07,084 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2023-11-29 06:59:07,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 1102 events. 623/1102 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5491 event pairs, 476 based on Foata normal form. 6/1047 useless extension candidates. Maximal degree in co-relation 2563. Up to 780 conditions per place. [2023-11-29 06:59:07,092 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 39 selfloop transitions, 2 changer transitions 17/68 dead transitions. [2023-11-29 06:59:07,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 323 flow [2023-11-29 06:59:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:59:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:59:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2023-11-29 06:59:07,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-11-29 06:59:07,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2023-11-29 06:59:07,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2023-11-29 06:59:07,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:07,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2023-11-29 06:59:07,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 06:59:07,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 06:59:07,096 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 06:59:07,096 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 156 flow. Second operand 4 states and 104 transitions. [2023-11-29 06:59:07,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 323 flow [2023-11-29 06:59:07,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 315 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:59:07,099 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 164 flow [2023-11-29 06:59:07,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-11-29 06:59:07,100 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2023-11-29 06:59:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 164 flow [2023-11-29 06:59:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:59:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:07,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:59:07,101 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 06:59:07,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1758412683, now seen corresponding path program 1 times [2023-11-29 06:59:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084992256] [2023-11-29 06:59:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084992256] [2023-11-29 06:59:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084992256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:07,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812140635] [2023-11-29 06:59:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:07,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:07,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:59:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:07,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:59:07,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:07,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:07,891 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 12 treesize of output 4 [2023-11-29 06:59:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812140635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:08,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-29 06:59:08,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461736519] [2023-11-29 06:59:08,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:59:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:59:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:59:08,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:08,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 164 flow. Second operand has 18 states, 18 states have (on average 17.555555555555557) internal successors, (316), 18 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 06:59:08,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:08,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:08,717 INFO L124 PetriNetUnfolderBase]: 793/1381 cut-off events. [2023-11-29 06:59:08,717 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2023-11-29 06:59:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3252 conditions, 1381 events. 793/1381 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7187 event pairs, 394 based on Foata normal form. 36/1340 useless extension candidates. Maximal degree in co-relation 3240. Up to 682 conditions per place. [2023-11-29 06:59:08,723 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 45 selfloop transitions, 4 changer transitions 42/101 dead transitions. [2023-11-29 06:59:08,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 496 flow [2023-11-29 06:59:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:59:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:59:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2023-11-29 06:59:08,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2023-11-29 06:59:08,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 201 transitions. [2023-11-29 06:59:08,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 201 transitions. [2023-11-29 06:59:08,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:08,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 201 transitions. [2023-11-29 06:59:08,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 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 06:59:08,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 06:59:08,727 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 06:59:08,727 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 164 flow. Second operand 9 states and 201 transitions. [2023-11-29 06:59:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 496 flow [2023-11-29 06:59:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 484 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 06:59:08,730 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 184 flow [2023-11-29 06:59:08,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2023-11-29 06:59:08,731 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2023-11-29 06:59:08,731 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 184 flow [2023-11-29 06:59:08,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.555555555555557) internal successors, (316), 18 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 06:59:08,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:08,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:08,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:59:08,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:08,938 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 06:59:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1014308281, now seen corresponding path program 2 times [2023-11-29 06:59:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:08,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98049654] [2023-11-29 06:59:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:09,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98049654] [2023-11-29 06:59:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98049654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430933312] [2023-11-29 06:59:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:59:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:09,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:09,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:09,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:59:09,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:59:09,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:09,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:59:09,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:10,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:10,778 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-29 06:59:10,778 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 36 treesize of output 15 [2023-11-29 06:59:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:11,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430933312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:11,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:11,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-29 06:59:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671417487] [2023-11-29 06:59:11,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:59:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:59:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:59:11,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2023-11-29 06:59:11,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 184 flow. Second operand has 25 states, 25 states have (on average 14.64) internal successors, (366), 25 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 06:59:11,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:11,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2023-11-29 06:59:11,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:14,478 INFO L124 PetriNetUnfolderBase]: 5685/8937 cut-off events. [2023-11-29 06:59:14,478 INFO L125 PetriNetUnfolderBase]: For 5118/5142 co-relation queries the response was YES. [2023-11-29 06:59:14,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21955 conditions, 8937 events. 5685/8937 cut-off events. For 5118/5142 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 59532 event pairs, 318 based on Foata normal form. 264/8624 useless extension candidates. Maximal degree in co-relation 21940. Up to 1267 conditions per place. [2023-11-29 06:59:14,547 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 299 selfloop transitions, 42 changer transitions 39/388 dead transitions. [2023-11-29 06:59:14,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 388 transitions, 1993 flow [2023-11-29 06:59:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:59:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:59:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 680 transitions. [2023-11-29 06:59:14,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-29 06:59:14,551 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 680 transitions. [2023-11-29 06:59:14,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 680 transitions. [2023-11-29 06:59:14,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:14,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 680 transitions. [2023-11-29 06:59:14,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 24.285714285714285) internal successors, (680), 28 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 06:59:14,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 50.0) internal successors, (1450), 29 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states 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 06:59:14,560 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 50.0) internal successors, (1450), 29 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states 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 06:59:14,560 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 184 flow. Second operand 28 states and 680 transitions. [2023-11-29 06:59:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 388 transitions, 1993 flow [2023-11-29 06:59:14,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 388 transitions, 1911 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-11-29 06:59:14,577 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 451 flow [2023-11-29 06:59:14,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=451, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2023-11-29 06:59:14,578 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 42 predicate places. [2023-11-29 06:59:14,578 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 451 flow [2023-11-29 06:59:14,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 14.64) internal successors, (366), 25 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 06:59:14,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:14,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:14,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 06:59:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:59:14,780 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 06:59:14,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash -447881999, now seen corresponding path program 3 times [2023-11-29 06:59:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:14,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301350766] [2023-11-29 06:59:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301350766] [2023-11-29 06:59:15,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301350766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867421249] [2023-11-29 06:59:15,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:59:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:15,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:15,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:59:15,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:59:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:15,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:59:15,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:59:16,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:16,699 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-29 06:59:16,699 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 37 treesize of output 15 [2023-11-29 06:59:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:59:16,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867421249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:16,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:16,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 21 [2023-11-29 06:59:16,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874484499] [2023-11-29 06:59:16,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:59:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:59:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:59:16,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2023-11-29 06:59:16,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 451 flow. Second operand has 21 states, 21 states have (on average 15.476190476190476) internal successors, (325), 21 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 06:59:16,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:16,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2023-11-29 06:59:16,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:18,525 INFO L124 PetriNetUnfolderBase]: 1795/2938 cut-off events. [2023-11-29 06:59:18,525 INFO L125 PetriNetUnfolderBase]: For 2607/2607 co-relation queries the response was YES. [2023-11-29 06:59:18,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7824 conditions, 2938 events. 1795/2938 cut-off events. For 2607/2607 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16269 event pairs, 182 based on Foata normal form. 68/2915 useless extension candidates. Maximal degree in co-relation 7809. Up to 895 conditions per place. [2023-11-29 06:59:18,550 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 27 changer transitions 3/217 dead transitions. [2023-11-29 06:59:18,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 217 transitions, 1174 flow [2023-11-29 06:59:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:59:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:59:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 440 transitions. [2023-11-29 06:59:18,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 06:59:18,554 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 440 transitions. [2023-11-29 06:59:18,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 440 transitions. [2023-11-29 06:59:18,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:18,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 440 transitions. [2023-11-29 06:59:18,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 06:59:18,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 06:59:18,561 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 50.0) internal successors, (1150), 23 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 06:59:18,562 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 451 flow. Second operand 22 states and 440 transitions. [2023-11-29 06:59:18,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 217 transitions, 1174 flow [2023-11-29 06:59:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 217 transitions, 1092 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-11-29 06:59:18,573 INFO L231 Difference]: Finished difference. Result has 97 places, 75 transitions, 356 flow [2023-11-29 06:59:18,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=356, PETRI_PLACES=97, PETRI_TRANSITIONS=75} [2023-11-29 06:59:18,574 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 49 predicate places. [2023-11-29 06:59:18,574 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 75 transitions, 356 flow [2023-11-29 06:59:18,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 15.476190476190476) internal successors, (325), 21 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 06:59:18,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:18,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:18,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:59:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:59:18,775 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 06:59:18,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash -3245767, now seen corresponding path program 1 times [2023-11-29 06:59:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529435698] [2023-11-29 06:59:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:19,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529435698] [2023-11-29 06:59:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529435698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435917748] [2023-11-29 06:59:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:19,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:19,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:59:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:19,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:59:19,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:19,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:59:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435917748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 06:59:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614631822] [2023-11-29 06:59:19,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:59:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:59:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:59:19,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:19,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 75 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 06:59:19,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:19,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:20,770 INFO L124 PetriNetUnfolderBase]: 2197/3893 cut-off events. [2023-11-29 06:59:20,770 INFO L125 PetriNetUnfolderBase]: For 3411/3601 co-relation queries the response was YES. [2023-11-29 06:59:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9916 conditions, 3893 events. 2197/3893 cut-off events. For 3411/3601 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25131 event pairs, 1038 based on Foata normal form. 100/3835 useless extension candidates. Maximal degree in co-relation 9900. Up to 1637 conditions per place. [2023-11-29 06:59:20,797 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 96 selfloop transitions, 10 changer transitions 13/136 dead transitions. [2023-11-29 06:59:20,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 829 flow [2023-11-29 06:59:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:59:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:59:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2023-11-29 06:59:20,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-11-29 06:59:20,801 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 204 transitions. [2023-11-29 06:59:20,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 204 transitions. [2023-11-29 06:59:20,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:20,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 204 transitions. [2023-11-29 06:59:20,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 22.666666666666668) internal successors, (204), 9 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 06:59:20,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 06:59:20,804 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 50.0) internal successors, (500), 10 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 06:59:20,805 INFO L175 Difference]: Start difference. First operand has 97 places, 75 transitions, 356 flow. Second operand 9 states and 204 transitions. [2023-11-29 06:59:20,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 829 flow [2023-11-29 06:59:20,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 771 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-29 06:59:20,812 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 381 flow [2023-11-29 06:59:20,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=381, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-11-29 06:59:20,813 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 48 predicate places. [2023-11-29 06:59:20,813 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 381 flow [2023-11-29 06:59:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 06:59:20,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:20,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:20,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:59:21,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:59:21,015 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 06:59:21,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1549484321, now seen corresponding path program 4 times [2023-11-29 06:59:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:21,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669489813] [2023-11-29 06:59:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:59:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669489813] [2023-11-29 06:59:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669489813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487690542] [2023-11-29 06:59:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:59:21,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:21,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:21,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:21,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:59:21,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:59:21,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:21,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:59:21,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:59:21,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:59:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487690542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:21,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:59:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791565724] [2023-11-29 06:59:21,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:59:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:59:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:59:21,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 06:59:21,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 381 flow. Second operand has 12 states, 12 states have (on average 17.25) internal successors, (207), 12 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 06:59:21,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:21,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 06:59:21,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:22,582 INFO L124 PetriNetUnfolderBase]: 3327/6128 cut-off events. [2023-11-29 06:59:22,582 INFO L125 PetriNetUnfolderBase]: For 6584/6748 co-relation queries the response was YES. [2023-11-29 06:59:22,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16093 conditions, 6128 events. 3327/6128 cut-off events. For 6584/6748 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 45032 event pairs, 1564 based on Foata normal form. 258/6105 useless extension candidates. Maximal degree in co-relation 16072. Up to 2463 conditions per place. [2023-11-29 06:59:22,627 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 110 selfloop transitions, 10 changer transitions 10/147 dead transitions. [2023-11-29 06:59:22,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 147 transitions, 937 flow [2023-11-29 06:59:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:59:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:59:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2023-11-29 06:59:22,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-29 06:59:22,629 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 192 transitions. [2023-11-29 06:59:22,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 192 transitions. [2023-11-29 06:59:22,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:22,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 192 transitions. [2023-11-29 06:59:22,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 06:59:22,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 06:59:22,633 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 06:59:22,633 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 381 flow. Second operand 8 states and 192 transitions. [2023-11-29 06:59:22,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 147 transitions, 937 flow [2023-11-29 06:59:22,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 147 transitions, 916 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 06:59:22,651 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 434 flow [2023-11-29 06:59:22,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=434, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2023-11-29 06:59:22,652 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 55 predicate places. [2023-11-29 06:59:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 434 flow [2023-11-29 06:59:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.25) internal successors, (207), 12 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 06:59:22,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:22,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:22,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:59:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:59:22,854 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 06:59:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash 650215101, now seen corresponding path program 2 times [2023-11-29 06:59:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096228217] [2023-11-29 06:59:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:59:25,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:25,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096228217] [2023-11-29 06:59:25,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096228217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:25,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354622090] [2023-11-29 06:59:25,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:59:25,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:25,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:25,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:59:25,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:59:25,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:25,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 06:59:25,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:59:25,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:26,730 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-11-29 06:59:26,731 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 45 treesize of output 101 [2023-11-29 06:59:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:59:27,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354622090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:27,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:27,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 34 [2023-11-29 06:59:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067322631] [2023-11-29 06:59:27,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:59:27,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:59:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:59:27,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-29 06:59:27,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 434 flow. Second operand has 34 states, 34 states have (on average 12.117647058823529) internal successors, (412), 34 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 06:59:27,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:27,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-29 06:59:27,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:33,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 06:59:37,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:59:42,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:00:01,510 INFO L124 PetriNetUnfolderBase]: 23122/38641 cut-off events. [2023-11-29 07:00:01,510 INFO L125 PetriNetUnfolderBase]: For 47739/47739 co-relation queries the response was YES. [2023-11-29 07:00:01,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105825 conditions, 38641 events. 23122/38641 cut-off events. For 47739/47739 co-relation queries the response was YES. Maximal size of possible extension queue 1402. Compared 310211 event pairs, 1801 based on Foata normal form. 484/36645 useless extension candidates. Maximal degree in co-relation 105801. Up to 7206 conditions per place. [2023-11-29 07:00:01,742 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 738 selfloop transitions, 199 changer transitions 187/1130 dead transitions. [2023-11-29 07:00:01,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1130 transitions, 6600 flow [2023-11-29 07:00:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 07:00:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-11-29 07:00:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 1967 transitions. [2023-11-29 07:00:01,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3642592592592593 [2023-11-29 07:00:01,750 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 1967 transitions. [2023-11-29 07:00:01,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 1967 transitions. [2023-11-29 07:00:01,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:01,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 1967 transitions. [2023-11-29 07:00:01,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 18.212962962962962) internal successors, (1967), 108 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 07:00:01,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 50.0) internal successors, (5450), 109 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states 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 07:00:01,777 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 50.0) internal successors, (5450), 109 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states 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 07:00:01,777 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 434 flow. Second operand 108 states and 1967 transitions. [2023-11-29 07:00:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1130 transitions, 6600 flow [2023-11-29 07:00:01,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1130 transitions, 6561 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-29 07:00:02,000 INFO L231 Difference]: Finished difference. Result has 245 places, 286 transitions, 2178 flow [2023-11-29 07:00:02,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=2178, PETRI_PLACES=245, PETRI_TRANSITIONS=286} [2023-11-29 07:00:02,001 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 197 predicate places. [2023-11-29 07:00:02,001 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 286 transitions, 2178 flow [2023-11-29 07:00:02,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.117647058823529) internal successors, (412), 34 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 07:00:02,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:02,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:02,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 07:00:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 07:00:02,205 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 07:00:02,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2143260707, now seen corresponding path program 3 times [2023-11-29 07:00:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:02,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196121681] [2023-11-29 07:00:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:02,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:04,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196121681] [2023-11-29 07:00:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196121681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039901588] [2023-11-29 07:00:04,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 07:00:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:04,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:04,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 07:00:04,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 07:00:04,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:00:04,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 07:00:04,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:05,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:00:06,646 INFO L349 Elim1Store]: treesize reduction 20, result has 86.4 percent of original size [2023-11-29 07:00:06,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 143 [2023-11-29 07:00:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 07:00:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039901588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:00:07,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:00:07,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 9] total 36 [2023-11-29 07:00:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835345498] [2023-11-29 07:00:07,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:00:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 07:00:07,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 07:00:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 07:00:07,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-29 07:00:07,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 286 transitions, 2178 flow. Second operand has 36 states, 36 states have (on average 12.916666666666666) internal successors, (465), 36 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 07:00:07,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:07,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-29 07:00:07,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:00:26,204 INFO L124 PetriNetUnfolderBase]: 22605/39852 cut-off events. [2023-11-29 07:00:26,204 INFO L125 PetriNetUnfolderBase]: For 531483/532634 co-relation queries the response was YES. [2023-11-29 07:00:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164523 conditions, 39852 events. 22605/39852 cut-off events. For 531483/532634 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 338683 event pairs, 3505 based on Foata normal form. 889/39797 useless extension candidates. Maximal degree in co-relation 164461. Up to 13424 conditions per place. [2023-11-29 07:00:26,640 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 672 selfloop transitions, 213 changer transitions 19/916 dead transitions. [2023-11-29 07:00:26,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 916 transitions, 8210 flow [2023-11-29 07:00:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 07:00:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-29 07:00:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1137 transitions. [2023-11-29 07:00:26,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39206896551724135 [2023-11-29 07:00:26,646 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 1137 transitions. [2023-11-29 07:00:26,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 1137 transitions. [2023-11-29 07:00:26,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:26,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 1137 transitions. [2023-11-29 07:00:26,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 19.603448275862068) internal successors, (1137), 58 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 07:00:26,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 50.0) internal successors, (2950), 59 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states 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 07:00:26,660 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 50.0) internal successors, (2950), 59 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states 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 07:00:26,660 INFO L175 Difference]: Start difference. First operand has 245 places, 286 transitions, 2178 flow. Second operand 58 states and 1137 transitions. [2023-11-29 07:00:26,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 916 transitions, 8210 flow [2023-11-29 07:00:27,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 916 transitions, 7405 flow, removed 396 selfloop flow, removed 7 redundant places. [2023-11-29 07:00:27,684 INFO L231 Difference]: Finished difference. Result has 305 places, 401 transitions, 3840 flow [2023-11-29 07:00:27,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=3840, PETRI_PLACES=305, PETRI_TRANSITIONS=401} [2023-11-29 07:00:27,685 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 257 predicate places. [2023-11-29 07:00:27,685 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 401 transitions, 3840 flow [2023-11-29 07:00:27,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 12.916666666666666) internal successors, (465), 36 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 07:00:27,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:27,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:27,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 07:00:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 07:00:27,887 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 07:00:27,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -867292117, now seen corresponding path program 4 times [2023-11-29 07:00:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574324322] [2023-11-29 07:00:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:27,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574324322] [2023-11-29 07:00:29,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574324322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132972726] [2023-11-29 07:00:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 07:00:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:29,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:29,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 07:00:30,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 07:00:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:00:30,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 07:00:30,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:31,121 INFO L349 Elim1Store]: treesize reduction 107, result has 29.6 percent of original size [2023-11-29 07:00:31,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 59 [2023-11-29 07:00:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:31,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:00:31,915 INFO L349 Elim1Store]: treesize reduction 14, result has 90.2 percent of original size [2023-11-29 07:00:31,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 145 [2023-11-29 07:00:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132972726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:00:32,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:00:32,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2023-11-29 07:00:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27800610] [2023-11-29 07:00:32,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:00:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 07:00:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 07:00:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 07:00:33,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2023-11-29 07:00:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 401 transitions, 3840 flow. Second operand has 41 states, 41 states have (on average 12.536585365853659) internal successors, (514), 41 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 07:00:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2023-11-29 07:00:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:24,739 INFO L124 PetriNetUnfolderBase]: 26295/47098 cut-off events. [2023-11-29 07:01:24,739 INFO L125 PetriNetUnfolderBase]: For 933936/935227 co-relation queries the response was YES. [2023-11-29 07:01:25,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209688 conditions, 47098 events. 26295/47098 cut-off events. For 933936/935227 co-relation queries the response was YES. Maximal size of possible extension queue 1378. Compared 414386 event pairs, 9984 based on Foata normal form. 906/47830 useless extension candidates. Maximal degree in co-relation 209605. Up to 13904 conditions per place. [2023-11-29 07:01:25,320 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 599 selfloop transitions, 285 changer transitions 162/1058 dead transitions. [2023-11-29 07:01:25,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1058 transitions, 11265 flow [2023-11-29 07:01:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 07:01:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-29 07:01:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 1153 transitions. [2023-11-29 07:01:25,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37193548387096775 [2023-11-29 07:01:25,323 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 1153 transitions. [2023-11-29 07:01:25,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 1153 transitions. [2023-11-29 07:01:25,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:25,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 1153 transitions. [2023-11-29 07:01:25,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 18.596774193548388) internal successors, (1153), 62 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states 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 07:01:25,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 50.0) internal successors, (3150), 63 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 07:01:25,332 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 50.0) internal successors, (3150), 63 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 07:01:25,333 INFO L175 Difference]: Start difference. First operand has 305 places, 401 transitions, 3840 flow. Second operand 62 states and 1153 transitions. [2023-11-29 07:01:25,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1058 transitions, 11265 flow [2023-11-29 07:01:32,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1058 transitions, 9980 flow, removed 588 selfloop flow, removed 25 redundant places. [2023-11-29 07:01:32,299 INFO L231 Difference]: Finished difference. Result has 357 places, 483 transitions, 5710 flow [2023-11-29 07:01:32,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=5710, PETRI_PLACES=357, PETRI_TRANSITIONS=483} [2023-11-29 07:01:32,300 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 309 predicate places. [2023-11-29 07:01:32,300 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 483 transitions, 5710 flow [2023-11-29 07:01:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 12.536585365853659) internal successors, (514), 41 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 07:01:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:01:32,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:32,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 07:01:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 07:01:32,501 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 07:01:32,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2104379507, now seen corresponding path program 5 times [2023-11-29 07:01:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408599884] [2023-11-29 07:01:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:01:34,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:34,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408599884] [2023-11-29 07:01:34,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408599884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:34,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234174549] [2023-11-29 07:01:34,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 07:01:34,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:34,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:34,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:34,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 07:01:34,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 07:01:34,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:01:34,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 07:01:34,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:35,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:01:35,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-29 07:01:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 07:01:35,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:36,420 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-11-29 07:01:36,420 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 45 treesize of output 101 [2023-11-29 07:01:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 07:01:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234174549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:36,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:36,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 9] total 37 [2023-11-29 07:01:36,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410282358] [2023-11-29 07:01:36,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:36,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 07:01:36,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 07:01:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 07:01:37,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2023-11-29 07:01:37,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 483 transitions, 5710 flow. Second operand has 37 states, 37 states have (on average 11.702702702702704) internal successors, (433), 37 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 07:01:37,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:01:37,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2023-11-29 07:01:37,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:45,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:01:49,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:01:54,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:01:58,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:02:06,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:03:02,626 INFO L124 PetriNetUnfolderBase]: 95053/158151 cut-off events. [2023-11-29 07:03:02,626 INFO L125 PetriNetUnfolderBase]: For 1973083/1973083 co-relation queries the response was YES. [2023-11-29 07:03:04,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668827 conditions, 158151 events. 95053/158151 cut-off events. For 1973083/1973083 co-relation queries the response was YES. Maximal size of possible extension queue 5541. Compared 1517606 event pairs, 9312 based on Foata normal form. 2956/161104 useless extension candidates. Maximal degree in co-relation 668728. Up to 19364 conditions per place. [2023-11-29 07:03:05,482 INFO L140 encePairwiseOnDemand]: 32/50 looper letters, 1567 selfloop transitions, 1117 changer transitions 54/2744 dead transitions. [2023-11-29 07:03:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 2744 transitions, 31838 flow [2023-11-29 07:03:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-11-29 07:03:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2023-11-29 07:03:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 2759 transitions. [2023-11-29 07:03:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148872180451128 [2023-11-29 07:03:05,488 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 2759 transitions. [2023-11-29 07:03:05,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 2759 transitions. [2023-11-29 07:03:05,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:03:05,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 2759 transitions. [2023-11-29 07:03:05,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 20.74436090225564) internal successors, (2759), 133 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states 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 07:03:05,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 50.0) internal successors, (6700), 134 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states 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 07:03:05,502 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 50.0) internal successors, (6700), 134 states have internal predecessors, (6700), 0 states have call successors, (0), 0 states 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 07:03:05,502 INFO L175 Difference]: Start difference. First operand has 357 places, 483 transitions, 5710 flow. Second operand 133 states and 2759 transitions. [2023-11-29 07:03:05,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 2744 transitions, 31838 flow [2023-11-29 07:03:52,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2744 transitions, 28003 flow, removed 1866 selfloop flow, removed 26 redundant places. [2023-11-29 07:03:52,716 INFO L231 Difference]: Finished difference. Result has 499 places, 1480 transitions, 21433 flow [2023-11-29 07:03:52,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4697, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=21433, PETRI_PLACES=499, PETRI_TRANSITIONS=1480} [2023-11-29 07:03:52,717 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 451 predicate places. [2023-11-29 07:03:52,717 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1480 transitions, 21433 flow [2023-11-29 07:03:52,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.702702702702704) internal successors, (433), 37 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 07:03:52,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:03:52,718 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:03:52,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 07:03:52,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 07:03:52,919 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 07:03:52,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 661662801, now seen corresponding path program 6 times [2023-11-29 07:03:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:52,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609771182] [2023-11-29 07:03:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:52,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 07:03:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609771182] [2023-11-29 07:03:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609771182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:53,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061998559] [2023-11-29 07:03:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:53,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 07:03:53,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1480 transitions, 21433 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 07:03:53,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:03:53,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 07:03:53,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:04:38,328 INFO L124 PetriNetUnfolderBase]: 53370/99292 cut-off events. [2023-11-29 07:04:38,328 INFO L125 PetriNetUnfolderBase]: For 1247180/1251960 co-relation queries the response was YES. [2023-11-29 07:04:39,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454514 conditions, 99292 events. 53370/99292 cut-off events. For 1247180/1251960 co-relation queries the response was YES. Maximal size of possible extension queue 3629. Compared 1043648 event pairs, 14150 based on Foata normal form. 3437/100432 useless extension candidates. Maximal degree in co-relation 454377. Up to 32947 conditions per place. [2023-11-29 07:04:40,494 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 774 selfloop transitions, 438 changer transitions 2/1540 dead transitions. [2023-11-29 07:04:40,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1540 transitions, 25619 flow [2023-11-29 07:04:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:04:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:04:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2023-11-29 07:04:40,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2023-11-29 07:04:40,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2023-11-29 07:04:40,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2023-11-29 07:04:40,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:04:40,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2023-11-29 07:04:40,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 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 07:04:40,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 07:04:40,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 50.0) internal successors, (250), 5 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 07:04:40,497 INFO L175 Difference]: Start difference. First operand has 499 places, 1480 transitions, 21433 flow. Second operand 4 states and 130 transitions. [2023-11-29 07:04:40,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1540 transitions, 25619 flow [2023-11-29 07:05:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1540 transitions, 17634 flow, removed 3731 selfloop flow, removed 40 redundant places. [2023-11-29 07:05:24,979 INFO L231 Difference]: Finished difference. Result has 416 places, 1355 transitions, 15729 flow [2023-11-29 07:05:24,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=10368, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=15729, PETRI_PLACES=416, PETRI_TRANSITIONS=1355} [2023-11-29 07:05:24,981 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 368 predicate places. [2023-11-29 07:05:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1355 transitions, 15729 flow [2023-11-29 07:05:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 07:05:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:05:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-29 07:05:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 07:05:24,982 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 07:05:24,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:05:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1843317730, now seen corresponding path program 1 times [2023-11-29 07:05:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:05:24,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758825529] [2023-11-29 07:05:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:05:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:05:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:05:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 07:05:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:05:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758825529] [2023-11-29 07:05:25,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758825529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:05:25,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117877655] [2023-11-29 07:05:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:05:25,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:05:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:05:25,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:05:25,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f836020-34c0-43e2-bdc3-b7dd5b1ca0be/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 07:05:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:05:25,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:05:25,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:05:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 07:05:25,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:05:25,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117877655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:05:25,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:05:25,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-29 07:05:25,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477719987] [2023-11-29 07:05:25,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:05:25,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:05:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:05:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:05:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:05:25,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-29 07:05:25,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1355 transitions, 15729 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 07:05:25,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:05:25,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-29 07:05:25,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand