./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/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_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/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_0281f124-f807-47f8-b2ed-0e5c06855618/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 e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:10:58,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:10:58,799 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:10:58,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:10:58,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:10:58,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:10:58,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:10:58,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:10:58,832 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:10:58,832 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:10:58,833 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:10:58,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:10:58,834 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:10:58,835 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:10:58,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:10:58,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:10:58,836 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:10:58,837 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:10:58,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:10:58,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:10:58,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:10:58,839 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:10:58,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:10:58,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:10:58,841 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:10:58,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:10:58,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:10:58,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:10:58,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:10:58,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:10:58,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:10:58,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:10:58,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:10:58,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:10:58,844 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:10:58,845 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:10:58,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:10:58,845 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:10:58,845 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:10:58,845 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:10:58,846 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:10:58,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:10:58,846 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_0281f124-f807-47f8-b2ed-0e5c06855618/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e53c8de1752bcaae88365f4089aa38090949baac13984623f5e7e3707a7b4c63 [2023-11-29 04:10:59,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:10:59,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:10:59,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:10:59,102 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:10:59,103 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:10:59,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 04:11:01,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:11:01,993 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:11:01,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2023-11-29 04:11:02,000 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/data/899846870/04d7255aab8f4166880700b865648134/FLAG628e08e0f [2023-11-29 04:11:02,011 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/data/899846870/04d7255aab8f4166880700b865648134 [2023-11-29 04:11:02,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:11:02,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:11:02,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:11:02,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:11:02,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:11:02,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60931aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02, skipping insertion in model container [2023-11-29 04:11:02,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:11:02,196 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_0281f124-f807-47f8-b2ed-0e5c06855618/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-29 04:11:02,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:11:02,216 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:11:02,238 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_0281f124-f807-47f8-b2ed-0e5c06855618/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2729,2742] [2023-11-29 04:11:02,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:11:02,249 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:02,250 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:11:02,262 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:11:02,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02 WrapperNode [2023-11-29 04:11:02,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:11:02,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:11:02,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:11:02,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:11:02,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,294 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,330 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 125 [2023-11-29 04:11:02,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:11:02,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:11:02,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:11:02,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:11:02,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,346 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,363 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 6, 2, 2, 2]. 43 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, 3, 1, 1, 1]. [2023-11-29 04:11:02,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:11:02,386 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:11:02,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:11:02,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:11:02,387 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (1/1) ... [2023-11-29 04:11:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:11:02,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:02,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:11:02,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:11:02,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 04:11:02,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:11:02,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:11:02,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:11:02,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 04:11:02,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:11:02,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 04:11:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 04:11:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 04:11:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:11:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:11:02,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:11:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:11:02,450 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 04:11:02,568 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:11:02,570 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:11:02,833 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:11:03,072 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:11:03,072 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 04:11:03,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:03 BoogieIcfgContainer [2023-11-29 04:11:03,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:11:03,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:11:03,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:11:03,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:11:03,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:11:02" (1/3) ... [2023-11-29 04:11:03,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4ca664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:03, skipping insertion in model container [2023-11-29 04:11:03,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:11:02" (2/3) ... [2023-11-29 04:11:03,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4ca664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:11:03, skipping insertion in model container [2023-11-29 04:11:03,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:03" (3/3) ... [2023-11-29 04:11:03,082 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-11-29 04:11:03,091 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:11:03,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:11:03,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:11:03,103 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:11:03,152 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 04:11:03,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 101 flow [2023-11-29 04:11:03,221 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2023-11-29 04:11:03,222 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:11:03,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 6/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-29 04:11:03,225 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 101 flow [2023-11-29 04:11:03,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 36 transitions, 90 flow [2023-11-29 04:11:03,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:11:03,247 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;@5a374437, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:11:03,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 04:11:03,261 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:11:03,262 INFO L124 PetriNetUnfolderBase]: 6/35 cut-off events. [2023-11-29 04:11:03,262 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 04:11:03,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:03,263 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] [2023-11-29 04:11:03,263 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 04:11:03,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash 841008197, now seen corresponding path program 1 times [2023-11-29 04:11:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:03,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108965112] [2023-11-29 04:11:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:04,126 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 04:11:04,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:04,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108965112] [2023-11-29 04:11:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108965112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:04,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:04,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:11:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472797617] [2023-11-29 04:11:04,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:11:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:11:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:11:04,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:04,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 04:11:04,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:04,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:04,440 INFO L124 PetriNetUnfolderBase]: 725/1163 cut-off events. [2023-11-29 04:11:04,440 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-29 04:11:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 1163 events. 725/1163 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5051 event pairs, 382 based on Foata normal form. 1/1004 useless extension candidates. Maximal degree in co-relation 996. Up to 651 conditions per place. [2023-11-29 04:11:04,455 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 47 selfloop transitions, 5 changer transitions 1/61 dead transitions. [2023-11-29 04:11:04,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 264 flow [2023-11-29 04:11:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:11:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:11:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2023-11-29 04:11:04,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2023-11-29 04:11:04,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 98 transitions. [2023-11-29 04:11:04,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 98 transitions. [2023-11-29 04:11:04,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:04,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 98 transitions. [2023-11-29 04:11:04,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.5) internal successors, (98), 4 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 04:11:04,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 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 04:11:04,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 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 04:11:04,477 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 90 flow. Second operand 4 states and 98 transitions. [2023-11-29 04:11:04,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 264 flow [2023-11-29 04:11:04,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 04:11:04,486 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 112 flow [2023-11-29 04:11:04,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-11-29 04:11:04,491 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-11-29 04:11:04,491 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 112 flow [2023-11-29 04:11:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 04:11:04,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:04,491 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] [2023-11-29 04:11:04,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:11:04,492 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 04:11:04,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 634747928, now seen corresponding path program 1 times [2023-11-29 04:11:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:04,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321044326] [2023-11-29 04:11:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321044326] [2023-11-29 04:11:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321044326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075188343] [2023-11-29 04:11:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:04,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:04,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:11:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:04,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:04,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:04,854 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 04:11:04,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075188343] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:04,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:11:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:11:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294087573] [2023-11-29 04:11:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:04,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:11:04,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:04,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:11:04,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:04,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:04,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:05,212 INFO L124 PetriNetUnfolderBase]: 1400/2265 cut-off events. [2023-11-29 04:11:05,212 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-11-29 04:11:05,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 2265 events. 1400/2265 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11669 event pairs, 942 based on Foata normal form. 0/2111 useless extension candidates. Maximal degree in co-relation 4424. Up to 1007 conditions per place. [2023-11-29 04:11:05,227 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 54 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-11-29 04:11:05,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 306 flow [2023-11-29 04:11:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:11:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2023-11-29 04:11:05,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-29 04:11:05,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 112 transitions. [2023-11-29 04:11:05,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 112 transitions. [2023-11-29 04:11:05,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:05,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 112 transitions. [2023-11-29 04:11:05,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 04:11:05,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:05,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:05,235 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 112 flow. Second operand 5 states and 112 transitions. [2023-11-29 04:11:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 306 flow [2023-11-29 04:11:05,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 298 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 04:11:05,238 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 136 flow [2023-11-29 04:11:05,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-11-29 04:11:05,239 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-11-29 04:11:05,239 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 136 flow [2023-11-29 04:11:05,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:11:05,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:05,240 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] [2023-11-29 04:11:05,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 04:11:05,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:05,441 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 04:11:05,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 130403727, now seen corresponding path program 1 times [2023-11-29 04:11:05,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:05,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896438242] [2023-11-29 04:11:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:05,552 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 04:11:05,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896438242] [2023-11-29 04:11:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896438242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:05,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:11:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032187961] [2023-11-29 04:11:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:11:05,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:05,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:11:05,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:05,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:05,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:05,897 INFO L124 PetriNetUnfolderBase]: 1416/2410 cut-off events. [2023-11-29 04:11:05,897 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-11-29 04:11:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4698 conditions, 2410 events. 1416/2410 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13393 event pairs, 808 based on Foata normal form. 116/2378 useless extension candidates. Maximal degree in co-relation 3323. Up to 1016 conditions per place. [2023-11-29 04:11:05,912 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2023-11-29 04:11:05,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 374 flow [2023-11-29 04:11:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:11:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2023-11-29 04:11:05,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2023-11-29 04:11:05,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2023-11-29 04:11:05,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2023-11-29 04:11:05,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:05,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2023-11-29 04:11:05,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 04:11:05,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:05,918 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:05,918 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 136 flow. Second operand 6 states and 137 transitions. [2023-11-29 04:11:05,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 374 flow [2023-11-29 04:11:05,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 04:11:05,921 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 162 flow [2023-11-29 04:11:05,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-29 04:11:05,922 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2023-11-29 04:11:05,922 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 162 flow [2023-11-29 04:11:05,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:11:05,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:05,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:05,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:11:05,923 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 04:11:05,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash 954911720, now seen corresponding path program 1 times [2023-11-29 04:11:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:05,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081863614] [2023-11-29 04:11:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:05,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:11:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081863614] [2023-11-29 04:11:06,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081863614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771569831] [2023-11-29 04:11:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:06,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:06,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:06,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:06,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:11:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:06,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:11:06,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:11:06,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:06,252 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 04:11:06,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771569831] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:06,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:11:06,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:11:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31385750] [2023-11-29 04:11:06,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:06,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:11:06,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:06,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 04:11:06,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:06,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:06,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:06,591 INFO L124 PetriNetUnfolderBase]: 1268/2156 cut-off events. [2023-11-29 04:11:06,591 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2023-11-29 04:11:06,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 2156 events. 1268/2156 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11677 event pairs, 722 based on Foata normal form. 108/2128 useless extension candidates. Maximal degree in co-relation 2855. Up to 729 conditions per place. [2023-11-29 04:11:06,606 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 64 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2023-11-29 04:11:06,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 408 flow [2023-11-29 04:11:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:11:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2023-11-29 04:11:06,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2023-11-29 04:11:06,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2023-11-29 04:11:06,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2023-11-29 04:11:06,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:06,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2023-11-29 04:11:06,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:06,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:06,611 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:06,611 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 162 flow. Second operand 5 states and 124 transitions. [2023-11-29 04:11:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 408 flow [2023-11-29 04:11:06,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 397 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 04:11:06,616 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 175 flow [2023-11-29 04:11:06,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-11-29 04:11:06,617 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2023-11-29 04:11:06,617 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 175 flow [2023-11-29 04:11:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 04:11:06,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:06,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:06,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:11:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:06,818 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 04:11:06,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2064537860, now seen corresponding path program 1 times [2023-11-29 04:11:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:06,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53970551] [2023-11-29 04:11:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:11:06,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53970551] [2023-11-29 04:11:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53970551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061138991] [2023-11-29 04:11:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:06,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:06,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:06,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:11:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:07,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:11:07,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:11:07,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:11:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061138991] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:07,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:11:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:11:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264796956] [2023-11-29 04:11:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:07,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:11:07,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:11:07,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:07,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:11:07,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:07,549 INFO L124 PetriNetUnfolderBase]: 1425/2349 cut-off events. [2023-11-29 04:11:07,549 INFO L125 PetriNetUnfolderBase]: For 2795/2795 co-relation queries the response was YES. [2023-11-29 04:11:07,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5863 conditions, 2349 events. 1425/2349 cut-off events. For 2795/2795 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12252 event pairs, 562 based on Foata normal form. 0/2130 useless extension candidates. Maximal degree in co-relation 3332. Up to 602 conditions per place. [2023-11-29 04:11:07,570 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 76 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2023-11-29 04:11:07,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 493 flow [2023-11-29 04:11:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:11:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2023-11-29 04:11:07,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 04:11:07,572 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 140 transitions. [2023-11-29 04:11:07,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 140 transitions. [2023-11-29 04:11:07,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:07,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 140 transitions. [2023-11-29 04:11:07,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,574 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 175 flow. Second operand 6 states and 140 transitions. [2023-11-29 04:11:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 493 flow [2023-11-29 04:11:07,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 454 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-29 04:11:07,579 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 187 flow [2023-11-29 04:11:07,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-29 04:11:07,580 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-11-29 04:11:07,581 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 187 flow [2023-11-29 04:11:07,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:07,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:07,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:11:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:07,782 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 04:11:07,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -43812854, now seen corresponding path program 1 times [2023-11-29 04:11:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356490701] [2023-11-29 04:11:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:07,882 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 04:11:07,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:07,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356490701] [2023-11-29 04:11:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356490701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:07,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:07,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:11:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539923933] [2023-11-29 04:11:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:11:07,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:11:07,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:07,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:07,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:11:07,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:08,158 INFO L124 PetriNetUnfolderBase]: 926/1507 cut-off events. [2023-11-29 04:11:08,158 INFO L125 PetriNetUnfolderBase]: For 1493/1493 co-relation queries the response was YES. [2023-11-29 04:11:08,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1507 events. 926/1507 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6913 event pairs, 620 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 3029. Up to 985 conditions per place. [2023-11-29 04:11:08,170 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 33/73 dead transitions. [2023-11-29 04:11:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 385 flow [2023-11-29 04:11:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:11:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:11:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2023-11-29 04:11:08,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-11-29 04:11:08,172 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 124 transitions. [2023-11-29 04:11:08,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 124 transitions. [2023-11-29 04:11:08,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:08,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 124 transitions. [2023-11-29 04:11:08,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:08,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:08,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:08,174 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 187 flow. Second operand 6 states and 124 transitions. [2023-11-29 04:11:08,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 385 flow [2023-11-29 04:11:08,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:11:08,178 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 157 flow [2023-11-29 04:11:08,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2023-11-29 04:11:08,179 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 22 predicate places. [2023-11-29 04:11:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 157 flow [2023-11-29 04:11:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:08,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 04:11:08,180 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 04:11:08,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 690897977, now seen corresponding path program 1 times [2023-11-29 04:11:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114224075] [2023-11-29 04:11:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:11:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114224075] [2023-11-29 04:11:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114224075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:08,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079863371] [2023-11-29 04:11:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:08,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:08,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:11:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:08,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:11:08,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:11:08,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:11:08,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079863371] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:08,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:11:08,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 04:11:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595885797] [2023-11-29 04:11:08,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:11:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:11:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:11:08,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:11:08,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 04:11:08,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:08,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:11:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:08,773 INFO L124 PetriNetUnfolderBase]: 815/1371 cut-off events. [2023-11-29 04:11:08,773 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2023-11-29 04:11:08,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 1371 events. 815/1371 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6585 event pairs, 323 based on Foata normal form. 52/1323 useless extension candidates. Maximal degree in co-relation 3664. Up to 577 conditions per place. [2023-11-29 04:11:08,787 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 41 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-29 04:11:08,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 307 flow [2023-11-29 04:11:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:11:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:11:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2023-11-29 04:11:08,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-29 04:11:08,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 94 transitions. [2023-11-29 04:11:08,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 94 transitions. [2023-11-29 04:11:08,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:08,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 94 transitions. [2023-11-29 04:11:08,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 04:11:08,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:08,790 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states 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 04:11:08,790 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 157 flow. Second operand 5 states and 94 transitions. [2023-11-29 04:11:08,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 307 flow [2023-11-29 04:11:08,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 267 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-11-29 04:11:08,795 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 150 flow [2023-11-29 04:11:08,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-11-29 04:11:08,796 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-11-29 04:11:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 150 flow [2023-11-29 04:11:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 04:11:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:08,796 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 04:11:08,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 04:11:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:11:09,003 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 04:11:09,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1816840522, now seen corresponding path program 1 times [2023-11-29 04:11:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924907283] [2023-11-29 04:11:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:11:09,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924907283] [2023-11-29 04:11:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924907283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:11:09,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:11:09,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 04:11:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87554467] [2023-11-29 04:11:09,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:11:09,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:11:09,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:11:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:11:09,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2023-11-29 04:11:09,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:09,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:09,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2023-11-29 04:11:09,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:09,777 INFO L124 PetriNetUnfolderBase]: 1621/2607 cut-off events. [2023-11-29 04:11:09,778 INFO L125 PetriNetUnfolderBase]: For 1543/1543 co-relation queries the response was YES. [2023-11-29 04:11:09,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6743 conditions, 2607 events. 1621/2607 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12069 event pairs, 285 based on Foata normal form. 114/2717 useless extension candidates. Maximal degree in co-relation 6717. Up to 1331 conditions per place. [2023-11-29 04:11:09,798 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 101 selfloop transitions, 17 changer transitions 9/133 dead transitions. [2023-11-29 04:11:09,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 133 transitions, 705 flow [2023-11-29 04:11:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:11:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:11:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2023-11-29 04:11:09,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-11-29 04:11:09,800 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 183 transitions. [2023-11-29 04:11:09,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 183 transitions. [2023-11-29 04:11:09,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:09,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 183 transitions. [2023-11-29 04:11:09,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 04:11:09,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 04:11:09,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 04:11:09,802 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 150 flow. Second operand 9 states and 183 transitions. [2023-11-29 04:11:09,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 133 transitions, 705 flow [2023-11-29 04:11:09,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 133 transitions, 697 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:11:09,810 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 278 flow [2023-11-29 04:11:09,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-29 04:11:09,810 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-11-29 04:11:09,811 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 278 flow [2023-11-29 04:11:09,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:09,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:09,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:11:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 04:11:09,811 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 04:11:09,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1365133991, now seen corresponding path program 2 times [2023-11-29 04:11:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:09,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804375706] [2023-11-29 04:11:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:11:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:09,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804375706] [2023-11-29 04:11:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804375706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684554915] [2023-11-29 04:11:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:11:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:09,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:09,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:11:10,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:11:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:10,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:10,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:11:10,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:11:10,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684554915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:10,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:10,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 04:11:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502943844] [2023-11-29 04:11:10,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:10,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:11:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:10,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:11:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:11:10,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:11:10,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 04:11:10,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:10,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:11:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:10,770 INFO L124 PetriNetUnfolderBase]: 1687/2999 cut-off events. [2023-11-29 04:11:10,770 INFO L125 PetriNetUnfolderBase]: For 4290/4351 co-relation queries the response was YES. [2023-11-29 04:11:10,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8947 conditions, 2999 events. 1687/2999 cut-off events. For 4290/4351 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 15784 event pairs, 978 based on Foata normal form. 36/2986 useless extension candidates. Maximal degree in co-relation 6757. Up to 1709 conditions per place. [2023-11-29 04:11:10,789 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 37 selfloop transitions, 6 changer transitions 51/110 dead transitions. [2023-11-29 04:11:10,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 110 transitions, 692 flow [2023-11-29 04:11:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:11:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:11:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2023-11-29 04:11:10,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2023-11-29 04:11:10,791 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 178 transitions. [2023-11-29 04:11:10,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 178 transitions. [2023-11-29 04:11:10,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:10,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 178 transitions. [2023-11-29 04:11:10,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 04:11:10,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 40.0) internal successors, (440), 11 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 04:11:10,793 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 40.0) internal successors, (440), 11 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 04:11:10,794 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 278 flow. Second operand 10 states and 178 transitions. [2023-11-29 04:11:10,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 110 transitions, 692 flow [2023-11-29 04:11:10,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 692 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:11:10,811 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 330 flow [2023-11-29 04:11:10,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2023-11-29 04:11:10,812 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2023-11-29 04:11:10,812 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 330 flow [2023-11-29 04:11:10,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states 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 04:11:10,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:10,813 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] [2023-11-29 04:11:10,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:11:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:11:11,014 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 04:11:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1487758162, now seen corresponding path program 3 times [2023-11-29 04:11:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30536146] [2023-11-29 04:11:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:11:11,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30536146] [2023-11-29 04:11:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30536146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927898034] [2023-11-29 04:11:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:11:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:11,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:11,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:11:11,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:11:11,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:11,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:11,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:11:11,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:11:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927898034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:11,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 04:11:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324153557] [2023-11-29 04:11:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:11:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:11:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:11:11,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:11,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 04:11:11,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:11,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:11,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:11,969 INFO L124 PetriNetUnfolderBase]: 1255/2200 cut-off events. [2023-11-29 04:11:11,969 INFO L125 PetriNetUnfolderBase]: For 3452/3562 co-relation queries the response was YES. [2023-11-29 04:11:11,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6964 conditions, 2200 events. 1255/2200 cut-off events. For 3452/3562 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11538 event pairs, 435 based on Foata normal form. 102/2235 useless extension candidates. Maximal degree in co-relation 6917. Up to 1105 conditions per place. [2023-11-29 04:11:11,986 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 75 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-11-29 04:11:11,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 768 flow [2023-11-29 04:11:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:11:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:11:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2023-11-29 04:11:11,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-11-29 04:11:11,987 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 159 transitions. [2023-11-29 04:11:11,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 159 transitions. [2023-11-29 04:11:11,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:11,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 159 transitions. [2023-11-29 04:11:11,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 04:11:11,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 04:11:11,989 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 04:11:11,990 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 330 flow. Second operand 9 states and 159 transitions. [2023-11-29 04:11:11,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 768 flow [2023-11-29 04:11:11,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 710 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-11-29 04:11:11,996 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 330 flow [2023-11-29 04:11:11,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-29 04:11:11,997 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2023-11-29 04:11:11,997 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 330 flow [2023-11-29 04:11:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.071428571428571) internal successors, (197), 14 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 04:11:11,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:11,998 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-11-29 04:11:12,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:11:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:11:12,199 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 04:11:12,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1382639054, now seen corresponding path program 4 times [2023-11-29 04:11:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:12,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495718029] [2023-11-29 04:11:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:12,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:11:12,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495718029] [2023-11-29 04:11:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495718029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542789037] [2023-11-29 04:11:12,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:11:12,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:12,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:12,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:12,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:11:12,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:11:12,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:12,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:11:12,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:12,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:12,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542789037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:12,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-29 04:11:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121103810] [2023-11-29 04:11:12,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:12,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:11:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:11:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:11:12,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2023-11-29 04:11:12,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 330 flow. Second operand has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:12,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:12,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2023-11-29 04:11:12,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:13,594 INFO L124 PetriNetUnfolderBase]: 2833/4886 cut-off events. [2023-11-29 04:11:13,595 INFO L125 PetriNetUnfolderBase]: For 8887/8947 co-relation queries the response was YES. [2023-11-29 04:11:13,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15802 conditions, 4886 events. 2833/4886 cut-off events. For 8887/8947 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26388 event pairs, 218 based on Foata normal form. 98/4925 useless extension candidates. Maximal degree in co-relation 15757. Up to 770 conditions per place. [2023-11-29 04:11:13,641 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 136 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2023-11-29 04:11:13,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 179 transitions, 1238 flow [2023-11-29 04:11:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:11:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 04:11:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 283 transitions. [2023-11-29 04:11:13,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421875 [2023-11-29 04:11:13,643 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 283 transitions. [2023-11-29 04:11:13,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 283 transitions. [2023-11-29 04:11:13,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:13,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 283 transitions. [2023-11-29 04:11:13,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 17.6875) internal successors, (283), 16 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 04:11:13,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:11:13,647 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:11:13,647 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 330 flow. Second operand 16 states and 283 transitions. [2023-11-29 04:11:13,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 179 transitions, 1238 flow [2023-11-29 04:11:13,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 179 transitions, 1146 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-29 04:11:13,664 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 460 flow [2023-11-29 04:11:13,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=460, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2023-11-29 04:11:13,665 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-11-29 04:11:13,665 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 460 flow [2023-11-29 04:11:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:11:13,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:13,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-29 04:11:13,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:11:13,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:13,871 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 04:11:13,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1665473225, now seen corresponding path program 5 times [2023-11-29 04:11:13,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:13,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836104911] [2023-11-29 04:11:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:13,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836104911] [2023-11-29 04:11:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836104911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316871621] [2023-11-29 04:11:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:11:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:14,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:14,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:11:14,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:11:14,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:14,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:14,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:14,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316871621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:14,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:14,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 04:11:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038099315] [2023-11-29 04:11:14,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:14,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:11:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:11:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:11:14,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-29 04:11:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 460 flow. Second operand has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:11:14,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:14,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-29 04:11:14,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:17,457 INFO L124 PetriNetUnfolderBase]: 11137/16627 cut-off events. [2023-11-29 04:11:17,458 INFO L125 PetriNetUnfolderBase]: For 29318/29378 co-relation queries the response was YES. [2023-11-29 04:11:17,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56144 conditions, 16627 events. 11137/16627 cut-off events. For 29318/29378 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 90598 event pairs, 2019 based on Foata normal form. 360/16982 useless extension candidates. Maximal degree in co-relation 56095. Up to 4505 conditions per place. [2023-11-29 04:11:17,583 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 468 selfloop transitions, 109 changer transitions 57/641 dead transitions. [2023-11-29 04:11:17,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 641 transitions, 4365 flow [2023-11-29 04:11:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 04:11:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-29 04:11:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 764 transitions. [2023-11-29 04:11:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2023-11-29 04:11:17,589 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 764 transitions. [2023-11-29 04:11:17,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 764 transitions. [2023-11-29 04:11:17,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:17,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 764 transitions. [2023-11-29 04:11:17,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 17.767441860465116) internal successors, (764), 43 states have internal predecessors, (764), 0 states have call successors, (0), 0 states 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 04:11:17,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 40.0) internal successors, (1760), 44 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 04:11:17,599 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 40.0) internal successors, (1760), 44 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 04:11:17,599 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 460 flow. Second operand 43 states and 764 transitions. [2023-11-29 04:11:17,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 641 transitions, 4365 flow [2023-11-29 04:11:17,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 641 transitions, 4337 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-29 04:11:17,671 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 1653 flow [2023-11-29 04:11:17,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1653, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2023-11-29 04:11:17,672 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2023-11-29 04:11:17,672 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 1653 flow [2023-11-29 04:11:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 04:11:17,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:17,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-29 04:11:17,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:11:17,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:11:17,874 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 04:11:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 48774543, now seen corresponding path program 6 times [2023-11-29 04:11:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557076622] [2023-11-29 04:11:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:18,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557076622] [2023-11-29 04:11:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557076622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002269168] [2023-11-29 04:11:18,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:11:18,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:18,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:18,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:18,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:11:18,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:11:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:18,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:18,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:18,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002269168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:18,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:18,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 04:11:18,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254840031] [2023-11-29 04:11:18,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:11:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:11:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:11:18,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-29 04:11:18,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 1653 flow. Second operand has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 04:11:18,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:18,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-29 04:11:18,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:23,414 INFO L124 PetriNetUnfolderBase]: 18122/27049 cut-off events. [2023-11-29 04:11:23,414 INFO L125 PetriNetUnfolderBase]: For 166749/166889 co-relation queries the response was YES. [2023-11-29 04:11:23,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119532 conditions, 27049 events. 18122/27049 cut-off events. For 166749/166889 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 157032 event pairs, 2993 based on Foata normal form. 318/27355 useless extension candidates. Maximal degree in co-relation 119461. Up to 7751 conditions per place. [2023-11-29 04:11:23,639 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 560 selfloop transitions, 197 changer transitions 22/786 dead transitions. [2023-11-29 04:11:23,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 786 transitions, 6981 flow [2023-11-29 04:11:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 04:11:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 04:11:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 756 transitions. [2023-11-29 04:11:23,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-29 04:11:23,643 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 756 transitions. [2023-11-29 04:11:23,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 756 transitions. [2023-11-29 04:11:23,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:23,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 756 transitions. [2023-11-29 04:11:23,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 18.0) internal successors, (756), 42 states have internal predecessors, (756), 0 states have call successors, (0), 0 states 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 04:11:23,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 40.0) internal successors, (1720), 43 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states 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 04:11:23,651 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 40.0) internal successors, (1720), 43 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states 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 04:11:23,651 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 1653 flow. Second operand 42 states and 756 transitions. [2023-11-29 04:11:23,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 786 transitions, 6981 flow [2023-11-29 04:11:24,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 786 transitions, 6609 flow, removed 186 selfloop flow, removed 1 redundant places. [2023-11-29 04:11:24,592 INFO L231 Difference]: Finished difference. Result has 210 places, 306 transitions, 3198 flow [2023-11-29 04:11:24,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3198, PETRI_PLACES=210, PETRI_TRANSITIONS=306} [2023-11-29 04:11:24,594 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 170 predicate places. [2023-11-29 04:11:24,594 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 306 transitions, 3198 flow [2023-11-29 04:11:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.0625) internal successors, (161), 16 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 04:11:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2023-11-29 04:11:24,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:11:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:11:24,795 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 04:11:24,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1366796505, now seen corresponding path program 7 times [2023-11-29 04:11:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191390235] [2023-11-29 04:11:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191390235] [2023-11-29 04:11:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191390235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713053245] [2023-11-29 04:11:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:11:25,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:25,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:25,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:11:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:25,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:25,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:25,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:11:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713053245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:25,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-29 04:11:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768475085] [2023-11-29 04:11:25,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:11:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:11:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:11:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-29 04:11:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 306 transitions, 3198 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 04:11:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:25,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-29 04:11:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:31,582 INFO L124 PetriNetUnfolderBase]: 19519/29177 cut-off events. [2023-11-29 04:11:31,582 INFO L125 PetriNetUnfolderBase]: For 287188/287512 co-relation queries the response was YES. [2023-11-29 04:11:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145934 conditions, 29177 events. 19519/29177 cut-off events. For 287188/287512 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 172755 event pairs, 1305 based on Foata normal form. 220/29376 useless extension candidates. Maximal degree in co-relation 145839. Up to 11587 conditions per place. [2023-11-29 04:11:31,889 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 202 changer transitions 15/633 dead transitions. [2023-11-29 04:11:31,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 633 transitions, 6708 flow [2023-11-29 04:11:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:11:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 04:11:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 447 transitions. [2023-11-29 04:11:31,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447 [2023-11-29 04:11:31,891 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 447 transitions. [2023-11-29 04:11:31,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 447 transitions. [2023-11-29 04:11:31,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:31,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 447 transitions. [2023-11-29 04:11:31,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 17.88) internal successors, (447), 25 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 04:11:31,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 40.0) internal successors, (1040), 26 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 04:11:31,894 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 40.0) internal successors, (1040), 26 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 04:11:31,894 INFO L175 Difference]: Start difference. First operand has 210 places, 306 transitions, 3198 flow. Second operand 25 states and 447 transitions. [2023-11-29 04:11:31,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 633 transitions, 6708 flow [2023-11-29 04:11:33,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 633 transitions, 6406 flow, removed 110 selfloop flow, removed 16 redundant places. [2023-11-29 04:11:33,556 INFO L231 Difference]: Finished difference. Result has 230 places, 354 transitions, 4200 flow [2023-11-29 04:11:33,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4200, PETRI_PLACES=230, PETRI_TRANSITIONS=354} [2023-11-29 04:11:33,557 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 190 predicate places. [2023-11-29 04:11:33,557 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 354 transitions, 4200 flow [2023-11-29 04:11:33,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 04:11:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:33,557 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2023-11-29 04:11:33,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:11:33,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:11:33,758 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 04:11:33,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash 42861950, now seen corresponding path program 8 times [2023-11-29 04:11:33,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:33,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823855058] [2023-11-29 04:11:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:33,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:33,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823855058] [2023-11-29 04:11:33,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823855058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914327620] [2023-11-29 04:11:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:11:33,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:33,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:11:34,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:11:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:34,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:11:34,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:34,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:11:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914327620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:34,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 04:11:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336719671] [2023-11-29 04:11:34,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:11:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:11:34,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:11:34,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:11:34,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 354 transitions, 4200 flow. Second operand has 19 states, 19 states have (on average 13.157894736842104) internal successors, (250), 19 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 04:11:34,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:34,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:11:34,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:40,065 INFO L124 PetriNetUnfolderBase]: 15217/27046 cut-off events. [2023-11-29 04:11:40,065 INFO L125 PetriNetUnfolderBase]: For 252249/253135 co-relation queries the response was YES. [2023-11-29 04:11:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140086 conditions, 27046 events. 15217/27046 cut-off events. For 252249/253135 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 205416 event pairs, 7805 based on Foata normal form. 496/27226 useless extension candidates. Maximal degree in co-relation 139418. Up to 14126 conditions per place. [2023-11-29 04:11:40,559 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 133 selfloop transitions, 8 changer transitions 122/478 dead transitions. [2023-11-29 04:11:40,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 478 transitions, 5995 flow [2023-11-29 04:11:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:11:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 04:11:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 228 transitions. [2023-11-29 04:11:40,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2023-11-29 04:11:40,561 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 228 transitions. [2023-11-29 04:11:40,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 228 transitions. [2023-11-29 04:11:40,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:40,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 228 transitions. [2023-11-29 04:11:40,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 17.53846153846154) internal successors, (228), 13 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 04:11:40,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 40.0) internal successors, (560), 14 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 04:11:40,563 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 40.0) internal successors, (560), 14 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 04:11:40,563 INFO L175 Difference]: Start difference. First operand has 230 places, 354 transitions, 4200 flow. Second operand 13 states and 228 transitions. [2023-11-29 04:11:40,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 478 transitions, 5995 flow [2023-11-29 04:11:43,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 478 transitions, 5832 flow, removed 64 selfloop flow, removed 5 redundant places. [2023-11-29 04:11:43,189 INFO L231 Difference]: Finished difference. Result has 244 places, 356 transitions, 4206 flow [2023-11-29 04:11:43,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4206, PETRI_PLACES=244, PETRI_TRANSITIONS=356} [2023-11-29 04:11:43,190 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 204 predicate places. [2023-11-29 04:11:43,190 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 356 transitions, 4206 flow [2023-11-29 04:11:43,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.157894736842104) internal successors, (250), 19 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 04:11:43,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:43,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-29 04:11:43,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:11:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:11:43,391 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 04:11:43,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1077308823, now seen corresponding path program 9 times [2023-11-29 04:11:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789659544] [2023-11-29 04:11:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:11:43,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:43,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789659544] [2023-11-29 04:11:43,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789659544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:43,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541837766] [2023-11-29 04:11:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:11:43,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:43,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:43,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:43,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:11:43,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:11:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:43,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:11:43,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:11:43,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:11:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541837766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:43,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 04:11:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628672505] [2023-11-29 04:11:43,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:11:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:11:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:11:43,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:11:44,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 356 transitions, 4206 flow. Second operand has 19 states, 19 states have (on average 13.631578947368421) internal successors, (259), 19 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 04:11:44,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:44,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:11:44,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:11:48,261 INFO L124 PetriNetUnfolderBase]: 11752/20364 cut-off events. [2023-11-29 04:11:48,261 INFO L125 PetriNetUnfolderBase]: For 177179/179116 co-relation queries the response was YES. [2023-11-29 04:11:48,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104126 conditions, 20364 events. 11752/20364 cut-off events. For 177179/179116 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 154165 event pairs, 2772 based on Foata normal form. 1041/20979 useless extension candidates. Maximal degree in co-relation 104006. Up to 7900 conditions per place. [2023-11-29 04:11:48,611 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 476 selfloop transitions, 12 changer transitions 0/705 dead transitions. [2023-11-29 04:11:48,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 705 transitions, 10158 flow [2023-11-29 04:11:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:11:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:11:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2023-11-29 04:11:48,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-29 04:11:48,613 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 208 transitions. [2023-11-29 04:11:48,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 208 transitions. [2023-11-29 04:11:48,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:11:48,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 208 transitions. [2023-11-29 04:11:48,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 04:11:48,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 04:11:48,615 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 40.0) internal successors, (520), 13 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 04:11:48,616 INFO L175 Difference]: Start difference. First operand has 244 places, 356 transitions, 4206 flow. Second operand 12 states and 208 transitions. [2023-11-29 04:11:48,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 705 transitions, 10158 flow [2023-11-29 04:11:49,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 705 transitions, 9726 flow, removed 210 selfloop flow, removed 9 redundant places. [2023-11-29 04:11:49,856 INFO L231 Difference]: Finished difference. Result has 239 places, 357 transitions, 4112 flow [2023-11-29 04:11:49,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4112, PETRI_PLACES=239, PETRI_TRANSITIONS=357} [2023-11-29 04:11:49,857 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 199 predicate places. [2023-11-29 04:11:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 357 transitions, 4112 flow [2023-11-29 04:11:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.631578947368421) internal successors, (259), 19 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 04:11:49,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:11:49,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-29 04:11:49,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:11:50,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:11:50,058 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 04:11:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:11:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 146154589, now seen corresponding path program 10 times [2023-11-29 04:11:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:11:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325476465] [2023-11-29 04:11:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:11:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:11:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:11:50,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:50,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325476465] [2023-11-29 04:11:50,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325476465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:50,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349773521] [2023-11-29 04:11:50,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:11:50,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:50,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:50,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:50,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:11:50,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:11:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:50,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:11:50,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:11:50,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:11:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349773521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:50,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:50,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2023-11-29 04:11:50,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445414159] [2023-11-29 04:11:50,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:50,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:11:50,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:11:50,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:11:50,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2023-11-29 04:11:50,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 357 transitions, 4112 flow. Second operand has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 04:11:50,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:11:50,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2023-11-29 04:11:50,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:02,289 INFO L124 PetriNetUnfolderBase]: 31481/51512 cut-off events. [2023-11-29 04:12:02,289 INFO L125 PetriNetUnfolderBase]: For 447793/448871 co-relation queries the response was YES. [2023-11-29 04:12:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263902 conditions, 51512 events. 31481/51512 cut-off events. For 447793/448871 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 378000 event pairs, 1321 based on Foata normal form. 1186/52240 useless extension candidates. Maximal degree in co-relation 263788. Up to 10487 conditions per place. [2023-11-29 04:12:03,210 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 475 selfloop transitions, 198 changer transitions 11/895 dead transitions. [2023-11-29 04:12:03,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 895 transitions, 9174 flow [2023-11-29 04:12:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 04:12:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 04:12:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 787 transitions. [2023-11-29 04:12:03,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491875 [2023-11-29 04:12:03,213 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 787 transitions. [2023-11-29 04:12:03,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 787 transitions. [2023-11-29 04:12:03,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:03,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 787 transitions. [2023-11-29 04:12:03,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 19.675) internal successors, (787), 40 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 04:12:03,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 40.0) internal successors, (1640), 41 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 04:12:03,220 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 40.0) internal successors, (1640), 41 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 04:12:03,220 INFO L175 Difference]: Start difference. First operand has 239 places, 357 transitions, 4112 flow. Second operand 40 states and 787 transitions. [2023-11-29 04:12:03,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 895 transitions, 9174 flow [2023-11-29 04:12:07,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 895 transitions, 8770 flow, removed 98 selfloop flow, removed 9 redundant places. [2023-11-29 04:12:07,490 INFO L231 Difference]: Finished difference. Result has 292 places, 467 transitions, 6032 flow [2023-11-29 04:12:07,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6032, PETRI_PLACES=292, PETRI_TRANSITIONS=467} [2023-11-29 04:12:07,491 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 252 predicate places. [2023-11-29 04:12:07,492 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 467 transitions, 6032 flow [2023-11-29 04:12:07,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 04:12:07,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:07,492 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:12:07,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:12:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:12:07,693 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 04:12:07,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash -274921216, now seen corresponding path program 11 times [2023-11-29 04:12:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787338148] [2023-11-29 04:12:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:12:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787338148] [2023-11-29 04:12:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787338148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964241700] [2023-11-29 04:12:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:12:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:07,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:07,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:12:08,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 04:12:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:08,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:12:08,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:12:08,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:12:08,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964241700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:08,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-11-29 04:12:08,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576837361] [2023-11-29 04:12:08,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:08,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:12:08,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:08,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:12:08,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:12:08,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2023-11-29 04:12:08,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 467 transitions, 6032 flow. Second operand has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:08,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:08,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2023-11-29 04:12:08,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:12:29,059 INFO L124 PetriNetUnfolderBase]: 51807/76568 cut-off events. [2023-11-29 04:12:29,059 INFO L125 PetriNetUnfolderBase]: For 861267/862233 co-relation queries the response was YES. [2023-11-29 04:12:29,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430147 conditions, 76568 events. 51807/76568 cut-off events. For 861267/862233 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 504425 event pairs, 2893 based on Foata normal form. 876/77283 useless extension candidates. Maximal degree in co-relation 430011. Up to 26083 conditions per place. [2023-11-29 04:12:30,225 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 805 selfloop transitions, 359 changer transitions 98/1278 dead transitions. [2023-11-29 04:12:30,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1278 transitions, 15240 flow [2023-11-29 04:12:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 04:12:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 04:12:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 893 transitions. [2023-11-29 04:12:30,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377450980392157 [2023-11-29 04:12:30,229 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 893 transitions. [2023-11-29 04:12:30,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 893 transitions. [2023-11-29 04:12:30,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:12:30,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 893 transitions. [2023-11-29 04:12:30,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 17.50980392156863) internal successors, (893), 51 states have internal predecessors, (893), 0 states have call successors, (0), 0 states 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 04:12:30,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 40.0) internal successors, (2080), 52 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 04:12:30,234 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 40.0) internal successors, (2080), 52 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 04:12:30,234 INFO L175 Difference]: Start difference. First operand has 292 places, 467 transitions, 6032 flow. Second operand 51 states and 893 transitions. [2023-11-29 04:12:30,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1278 transitions, 15240 flow [2023-11-29 04:12:42,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1278 transitions, 14754 flow, removed 163 selfloop flow, removed 12 redundant places. [2023-11-29 04:12:42,061 INFO L231 Difference]: Finished difference. Result has 354 places, 593 transitions, 8756 flow [2023-11-29 04:12:42,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8756, PETRI_PLACES=354, PETRI_TRANSITIONS=593} [2023-11-29 04:12:42,062 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 314 predicate places. [2023-11-29 04:12:42,062 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 593 transitions, 8756 flow [2023-11-29 04:12:42,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.294117647058824) internal successors, (175), 17 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:42,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:12:42,063 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:12:42,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:12:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:12:42,264 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 04:12:42,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 519177569, now seen corresponding path program 12 times [2023-11-29 04:12:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580936482] [2023-11-29 04:12:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:42,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 04:12:42,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:42,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580936482] [2023-11-29 04:12:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580936482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:42,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731724503] [2023-11-29 04:12:42,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:12:42,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:42,479 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:12:42,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 04:12:42,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:42,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:12:42,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 04:12:43,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 04:12:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731724503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:43,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-29 04:12:43,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610442385] [2023-11-29 04:12:43,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:12:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:12:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:12:43,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:12:43,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 593 transitions, 8756 flow. Second operand has 24 states, 24 states have (on average 12.875) internal successors, (309), 24 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 04:12:43,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:12:43,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:12:43,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:06,178 INFO L124 PetriNetUnfolderBase]: 42867/75150 cut-off events. [2023-11-29 04:13:06,179 INFO L125 PetriNetUnfolderBase]: For 1026496/1028479 co-relation queries the response was YES. [2023-11-29 04:13:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459218 conditions, 75150 events. 42867/75150 cut-off events. For 1026496/1028479 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 652220 event pairs, 20410 based on Foata normal form. 1331/75599 useless extension candidates. Maximal degree in co-relation 457499. Up to 36137 conditions per place. [2023-11-29 04:13:07,991 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 292 selfloop transitions, 10 changer transitions 226/818 dead transitions. [2023-11-29 04:13:07,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 818 transitions, 12964 flow [2023-11-29 04:13:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:13:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 04:13:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 276 transitions. [2023-11-29 04:13:07,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-11-29 04:13:07,993 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 276 transitions. [2023-11-29 04:13:07,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 276 transitions. [2023-11-29 04:13:07,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:07,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 276 transitions. [2023-11-29 04:13:07,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 17.25) internal successors, (276), 16 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 04:13:07,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:13:07,996 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:13:07,996 INFO L175 Difference]: Start difference. First operand has 354 places, 593 transitions, 8756 flow. Second operand 16 states and 276 transitions. [2023-11-29 04:13:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 818 transitions, 12964 flow [2023-11-29 04:13:31,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 818 transitions, 12457 flow, removed 119 selfloop flow, removed 18 redundant places. [2023-11-29 04:13:31,754 INFO L231 Difference]: Finished difference. Result has 356 places, 592 transitions, 8634 flow [2023-11-29 04:13:31,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8634, PETRI_PLACES=356, PETRI_TRANSITIONS=592} [2023-11-29 04:13:31,756 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 316 predicate places. [2023-11-29 04:13:31,756 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 592 transitions, 8634 flow [2023-11-29 04:13:31,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.875) internal successors, (309), 24 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 04:13:31,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:31,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 04:13:31,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:13:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:31,957 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:31,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2119535688, now seen corresponding path program 13 times [2023-11-29 04:13:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819335401] [2023-11-29 04:13:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 04:13:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819335401] [2023-11-29 04:13:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819335401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:13:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617391085] [2023-11-29 04:13:32,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:13:32,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:32,233 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:32,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:13:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:32,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:13:32,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 04:13:32,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 04:13:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617391085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:32,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:13:32,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-29 04:13:32,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92058951] [2023-11-29 04:13:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:13:32,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:13:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:13:32,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2023-11-29 04:13:32,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 592 transitions, 8634 flow. Second operand has 24 states, 24 states have (on average 13.333333333333334) internal successors, (320), 24 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 04:13:32,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:13:32,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2023-11-29 04:13:32,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:13:49,656 INFO L124 PetriNetUnfolderBase]: 29635/51301 cut-off events. [2023-11-29 04:13:49,656 INFO L125 PetriNetUnfolderBase]: For 695620/701520 co-relation queries the response was YES. [2023-11-29 04:13:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308684 conditions, 51301 events. 29635/51301 cut-off events. For 695620/701520 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 434544 event pairs, 5610 based on Foata normal form. 2273/52690 useless extension candidates. Maximal degree in co-relation 308508. Up to 16891 conditions per place. [2023-11-29 04:13:50,827 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 1352 selfloop transitions, 15 changer transitions 0/1665 dead transitions. [2023-11-29 04:13:50,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1665 transitions, 29570 flow [2023-11-29 04:13:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:13:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 04:13:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 257 transitions. [2023-11-29 04:13:50,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42833333333333334 [2023-11-29 04:13:50,828 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 257 transitions. [2023-11-29 04:13:50,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 257 transitions. [2023-11-29 04:13:50,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:13:50,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 257 transitions. [2023-11-29 04:13:50,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 17.133333333333333) internal successors, (257), 15 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:13:50,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 40.0) internal successors, (640), 16 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 04:13:50,830 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 40.0) internal successors, (640), 16 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 04:13:50,830 INFO L175 Difference]: Start difference. First operand has 356 places, 592 transitions, 8634 flow. Second operand 15 states and 257 transitions. [2023-11-29 04:13:50,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1665 transitions, 29570 flow [2023-11-29 04:13:58,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1665 transitions, 28428 flow, removed 563 selfloop flow, removed 11 redundant places. [2023-11-29 04:13:58,908 INFO L231 Difference]: Finished difference. Result has 350 places, 593 transitions, 8418 flow [2023-11-29 04:13:58,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8372, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8418, PETRI_PLACES=350, PETRI_TRANSITIONS=593} [2023-11-29 04:13:58,910 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 310 predicate places. [2023-11-29 04:13:58,910 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 593 transitions, 8418 flow [2023-11-29 04:13:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.333333333333334) internal successors, (320), 24 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 04:13:58,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:13:58,910 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 04:13:58,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:13:59,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:59,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:13:59,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:13:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 13896236, now seen corresponding path program 14 times [2023-11-29 04:13:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:13:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128937735] [2023-11-29 04:13:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:13:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:13:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:13:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 04:13:59,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:13:59,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128937735] [2023-11-29 04:13:59,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128937735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:13:59,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395639960] [2023-11-29 04:13:59,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:13:59,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:13:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:13:59,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:13:59,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:13:59,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:13:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:13:59,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:13:59,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:13:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 04:13:59,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 04:13:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395639960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:59,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:13:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-29 04:13:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861369146] [2023-11-29 04:13:59,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:13:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:13:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:14:00,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2023-11-29 04:14:00,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 593 transitions, 8418 flow. Second operand has 24 states, 24 states have (on average 13.416666666666666) internal successors, (322), 24 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 04:14:00,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:00,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2023-11-29 04:14:00,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:14:20,413 INFO L124 PetriNetUnfolderBase]: 41937/71288 cut-off events. [2023-11-29 04:14:20,413 INFO L125 PetriNetUnfolderBase]: For 1011084/1013137 co-relation queries the response was YES. [2023-11-29 04:14:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439346 conditions, 71288 events. 41937/71288 cut-off events. For 1011084/1013137 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 574997 event pairs, 5393 based on Foata normal form. 446/70459 useless extension candidates. Maximal degree in co-relation 439178. Up to 16642 conditions per place. [2023-11-29 04:14:21,830 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 324 selfloop transitions, 99 changer transitions 12/721 dead transitions. [2023-11-29 04:14:21,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 721 transitions, 10429 flow [2023-11-29 04:14:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:14:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 04:14:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 266 transitions. [2023-11-29 04:14:21,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2023-11-29 04:14:21,832 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 266 transitions. [2023-11-29 04:14:21,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 266 transitions. [2023-11-29 04:14:21,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:14:21,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 266 transitions. [2023-11-29 04:14:21,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 04:14:21,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:14:21,834 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 40.0) internal successors, (680), 17 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 04:14:21,834 INFO L175 Difference]: Start difference. First operand has 350 places, 593 transitions, 8418 flow. Second operand 16 states and 266 transitions. [2023-11-29 04:14:21,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 721 transitions, 10429 flow [2023-11-29 04:14:34,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 721 transitions, 10309 flow, removed 26 selfloop flow, removed 12 redundant places. [2023-11-29 04:14:35,006 INFO L231 Difference]: Finished difference. Result has 355 places, 598 transitions, 8708 flow [2023-11-29 04:14:35,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8378, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8708, PETRI_PLACES=355, PETRI_TRANSITIONS=598} [2023-11-29 04:14:35,007 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 315 predicate places. [2023-11-29 04:14:35,007 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 598 transitions, 8708 flow [2023-11-29 04:14:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.416666666666666) internal successors, (322), 24 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 04:14:35,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:14:35,007 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:14:35,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:14:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:35,207 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 04:14:35,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -824779889, now seen corresponding path program 15 times [2023-11-29 04:14:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:35,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457964040] [2023-11-29 04:14:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 04:14:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457964040] [2023-11-29 04:14:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457964040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:14:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663957736] [2023-11-29 04:14:35,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:14:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:14:35,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:14:35,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:14:36,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:14:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:14:36,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:14:36,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:14:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 04:14:36,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:14:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 04:14:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663957736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:14:36,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:14:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-11-29 04:14:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712087759] [2023-11-29 04:14:36,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:14:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:14:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:14:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:14:36,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 40 [2023-11-29 04:14:36,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 598 transitions, 8708 flow. Second operand has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 18 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 04:14:36,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:14:36,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 40 [2023-11-29 04:14:36,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:15:33,624 INFO L124 PetriNetUnfolderBase]: 125975/175066 cut-off events. [2023-11-29 04:15:33,624 INFO L125 PetriNetUnfolderBase]: For 2462434/2462434 co-relation queries the response was YES. [2023-11-29 04:15:36,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044731 conditions, 175066 events. 125975/175066 cut-off events. For 2462434/2462434 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 1074614 event pairs, 485 based on Foata normal form. 522/175588 useless extension candidates. Maximal degree in co-relation 1044562. Up to 34141 conditions per place. [2023-11-29 04:15:36,562 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 0 selfloop transitions, 0 changer transitions 4076/4076 dead transitions. [2023-11-29 04:15:36,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 4076 transitions, 47141 flow [2023-11-29 04:15:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-11-29 04:15:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2023-11-29 04:15:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 2994 transitions. [2023-11-29 04:15:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35306603773584905 [2023-11-29 04:15:36,574 INFO L72 ComplementDD]: Start complementDD. Operand 212 states and 2994 transitions. [2023-11-29 04:15:36,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 212 states and 2994 transitions. [2023-11-29 04:15:36,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:15:36,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 212 states and 2994 transitions. [2023-11-29 04:15:36,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 213 states, 212 states have (on average 14.122641509433961) internal successors, (2994), 212 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states 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 04:15:36,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 213 states, 213 states have (on average 40.0) internal successors, (8520), 213 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states 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 04:15:36,604 INFO L81 ComplementDD]: Finished complementDD. Result has 213 states, 213 states have (on average 40.0) internal successors, (8520), 213 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states 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 04:15:36,604 INFO L175 Difference]: Start difference. First operand has 355 places, 598 transitions, 8708 flow. Second operand 212 states and 2994 transitions. [2023-11-29 04:15:36,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 4076 transitions, 47141 flow [2023-11-29 04:16:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 4076 transitions, 46100 flow, removed 4 selfloop flow, removed 28 redundant places. [2023-11-29 04:16:33,170 INFO L231 Difference]: Finished difference. Result has 533 places, 0 transitions, 0 flow [2023-11-29 04:16:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=212, PETRI_FLOW=0, PETRI_PLACES=533, PETRI_TRANSITIONS=0} [2023-11-29 04:16:33,172 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 493 predicate places. [2023-11-29 04:16:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 0 transitions, 0 flow [2023-11-29 04:16:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 18 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 04:16:33,174 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-29 04:16:33,175 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-29 04:16:33,175 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-29 04:16:33,175 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-29 04:16:33,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:16:33,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 04:16:33,376 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:16:33,379 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 04:16:33,379 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 04:16:33,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 04:16:33 BasicIcfg [2023-11-29 04:16:33,385 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 04:16:33,385 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 04:16:33,385 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 04:16:33,385 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 04:16:33,386 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:11:03" (3/4) ... [2023-11-29 04:16:33,388 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 04:16:33,391 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 04:16:33,391 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 04:16:33,391 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-11-29 04:16:33,399 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 111 nodes and edges [2023-11-29 04:16:33,399 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2023-11-29 04:16:33,400 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-29 04:16:33,400 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 04:16:33,489 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 04:16:33,490 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 04:16:33,490 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 04:16:33,490 INFO L158 Benchmark]: Toolchain (without parser) took 331476.16ms. Allocated memory was 153.1MB in the beginning and 13.7GB in the end (delta: 13.5GB). Free memory was 116.8MB in the beginning and 8.7GB in the end (delta: -8.6GB). Peak memory consumption was 5.0GB. Max. memory is 16.1GB. [2023-11-29 04:16:33,491 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:16:33,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.83ms. Allocated memory is still 153.1MB. Free memory was 116.8MB in the beginning and 125.7MB in the end (delta: -8.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2023-11-29 04:16:33,491 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.89ms. Allocated memory is still 153.1MB. Free memory was 125.7MB in the beginning and 123.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:16:33,492 INFO L158 Benchmark]: Boogie Preprocessor took 54.05ms. Allocated memory is still 153.1MB. Free memory was 123.8MB in the beginning and 121.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:16:33,492 INFO L158 Benchmark]: RCFGBuilder took 686.53ms. Allocated memory is still 153.1MB. Free memory was 121.3MB in the beginning and 70.5MB in the end (delta: 50.8MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2023-11-29 04:16:33,492 INFO L158 Benchmark]: TraceAbstraction took 330309.27ms. Allocated memory was 153.1MB in the beginning and 13.7GB in the end (delta: 13.5GB). Free memory was 70.0MB in the beginning and 8.7GB in the end (delta: -8.6GB). Peak memory consumption was 13.7GB. Max. memory is 16.1GB. [2023-11-29 04:16:33,492 INFO L158 Benchmark]: Witness Printer took 104.56ms. Allocated memory is still 13.7GB. Free memory was 8.7GB in the beginning and 8.7GB in the end (delta: 6.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 04:16:33,494 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.83ms. Allocated memory is still 153.1MB. Free memory was 116.8MB in the beginning and 125.7MB in the end (delta: -8.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.89ms. Allocated memory is still 153.1MB. Free memory was 125.7MB in the beginning and 123.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.05ms. Allocated memory is still 153.1MB. Free memory was 123.8MB in the beginning and 121.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 686.53ms. Allocated memory is still 153.1MB. Free memory was 121.3MB in the beginning and 70.5MB in the end (delta: 50.8MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 330309.27ms. Allocated memory was 153.1MB in the beginning and 13.7GB in the end (delta: 13.5GB). Free memory was 70.0MB in the beginning and 8.7GB in the end (delta: -8.6GB). Peak memory consumption was 13.7GB. Max. memory is 16.1GB. * Witness Printer took 104.56ms. Allocated memory is still 13.7GB. Free memory was 8.7GB in the beginning and 8.7GB in the end (delta: 6.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 103]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 330.2s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 313.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4634 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4547 mSDsluCounter, 934 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 849 mSDsCounter, 216 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13967 IncrementalHoareTripleChecker+Invalid, 14183 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 216 mSolverCounterUnsat, 85 mSDtfsCounter, 13967 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2584 GetRequests, 1865 SyntacticMatches, 49 SemanticMatches, 670 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27305 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8756occurred in iteration=18, InterpolantAutomatonStates: 566, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 1834 NumberOfCodeBlocks, 1803 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2639 ConstructedInterpolants, 0 QuantifiedInterpolants, 8323 SizeOfPredicates, 55 NumberOfNonLiveVariables, 5238 ConjunctsInSsa, 153 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 1341/1816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 04:16:33,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0281f124-f807-47f8-b2ed-0e5c06855618/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE