./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1 --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 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 13:03:35,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 13:03:35,810 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 13:03:35,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 13:03:35,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 13:03:35,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 13:03:35,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 13:03:35,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 13:03:35,839 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 13:03:35,839 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 13:03:35,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 13:03:35,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 13:03:35,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 13:03:35,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 13:03:35,839 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 13:03:35,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 13:03:35,840 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 13:03:35,841 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:03:35,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 13:03:35,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:03:35,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 13:03:35,842 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1 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 -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2024-12-02 13:03:36,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 13:03:36,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 13:03:36,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 13:03:36,090 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 13:03:36,090 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 13:03:36,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-12-02 13:03:38,752 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/data/6de595d68/d8a2369bf4df440ba2f2dfccd528b319/FLAGeb1ff9de5 [2024-12-02 13:03:38,945 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 13:03:38,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-12-02 13:03:38,951 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/data/6de595d68/d8a2369bf4df440ba2f2dfccd528b319/FLAGeb1ff9de5 [2024-12-02 13:03:38,963 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/data/6de595d68/d8a2369bf4df440ba2f2dfccd528b319 [2024-12-02 13:03:38,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 13:03:38,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 13:03:38,968 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 13:03:38,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 13:03:38,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 13:03:38,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:03:38" (1/1) ... [2024-12-02 13:03:38,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a23c5a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:38, skipping insertion in model container [2024-12-02 13:03:38,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:03:38" (1/1) ... [2024-12-02 13:03:38,986 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 13:03:39,115 WARN L250 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_3db78b20-be13-430c-9d88-e03dc9484cf6/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2024-12-02 13:03:39,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:03:39,130 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 13:03:39,147 WARN L250 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_3db78b20-be13-430c-9d88-e03dc9484cf6/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2592,2605] [2024-12-02 13:03:39,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 13:03:39,161 INFO L204 MainTranslator]: Completed translation [2024-12-02 13:03:39,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39 WrapperNode [2024-12-02 13:03:39,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 13:03:39,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 13:03:39,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 13:03:39,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 13:03:39,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,188 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2024-12-02 13:03:39,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 13:03:39,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 13:03:39,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 13:03:39,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 13:03:39,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,213 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-12-02 13:03:39,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,218 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,224 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 13:03:39,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 13:03:39,228 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 13:03:39,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 13:03:39,229 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (1/1) ... [2024-12-02 13:03:39,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 13:03:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:39,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 13:03:39,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 13:03:39,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 13:03:39,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 13:03:39,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 13:03:39,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 13:03:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 13:03:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 13:03:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 13:03:39,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 13:03:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 13:03:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 13:03:39,279 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 13:03:39,361 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 13:03:39,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 13:03:39,576 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 13:03:39,576 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 13:03:39,726 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 13:03:39,726 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 13:03:39,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:03:39 BoogieIcfgContainer [2024-12-02 13:03:39,726 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 13:03:39,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 13:03:39,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 13:03:39,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 13:03:39,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:03:38" (1/3) ... [2024-12-02 13:03:39,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f38cd25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:03:39, skipping insertion in model container [2024-12-02 13:03:39,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:03:39" (2/3) ... [2024-12-02 13:03:39,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f38cd25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:03:39, skipping insertion in model container [2024-12-02 13:03:39,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:03:39" (3/3) ... [2024-12-02 13:03:39,735 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2024-12-02 13:03:39,746 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 13:03:39,747 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-array.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-12-02 13:03:39,747 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 13:03:39,798 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 13:03:39,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-12-02 13:03:39,860 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-12-02 13:03:39,862 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:03:39,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-12-02 13:03:39,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-12-02 13:03:39,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-12-02 13:03:39,885 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 13:03:39,894 INFO L333 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, 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;@3f449ca4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 13:03:39,894 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-12-02 13:03:39,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 13:03:39,905 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-12-02 13:03:39,905 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 13:03:39,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:39,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:03:39,907 INFO L396 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)] === [2024-12-02 13:03:39,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2007485954, now seen corresponding path program 1 times [2024-12-02 13:03:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:39,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550656671] [2024-12-02 13:03:39,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:39,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:40,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550656671] [2024-12-02 13:03:40,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550656671] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:03:40,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:03:40,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:03:40,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581379504] [2024-12-02 13:03:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:03:40,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:03:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:40,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:03:40,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:03:40,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-12-02 13:03:40,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:40,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:40,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-12-02 13:03:40,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:40,406 INFO L124 PetriNetUnfolderBase]: 617/953 cut-off events. [2024-12-02 13:03:40,407 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-12-02 13:03:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 953 events. 617/953 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3830 event pairs, 126 based on Foata normal form. 1/949 useless extension candidates. Maximal degree in co-relation 1714. Up to 677 conditions per place. [2024-12-02 13:03:40,414 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-12-02 13:03:40,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-12-02 13:03:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:03:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:03:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-12-02 13:03:40,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-12-02 13:03:40,426 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-12-02 13:03:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-12-02 13:03:40,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 13:03:40,434 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-12-02 13:03:40,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-12-02 13:03:40,439 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-12-02 13:03:40,439 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-12-02 13:03:40,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:40,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:40,439 INFO L206 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] [2024-12-02 13:03:40,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 13:03:40,439 INFO L396 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)] === [2024-12-02 13:03:40,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash -123763169, now seen corresponding path program 1 times [2024-12-02 13:03:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:40,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937780344] [2024-12-02 13:03:40,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:40,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937780344] [2024-12-02 13:03:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937780344] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:03:40,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:03:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 13:03:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854068026] [2024-12-02 13:03:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:03:40,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 13:03:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:40,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 13:03:40,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 13:03:40,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-12-02 13:03:40,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:40,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:40,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-12-02 13:03:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:40,756 INFO L124 PetriNetUnfolderBase]: 617/959 cut-off events. [2024-12-02 13:03:40,756 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2024-12-02 13:03:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2164 conditions, 959 events. 617/959 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3998 event pairs, 407 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 811. Up to 895 conditions per place. [2024-12-02 13:03:40,763 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-12-02 13:03:40,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2024-12-02 13:03:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 13:03:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 13:03:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-12-02 13:03:40,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-12-02 13:03:40,765 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2024-12-02 13:03:40,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2024-12-02 13:03:40,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 13:03:40,767 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2024-12-02 13:03:40,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-12-02 13:03:40,768 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-12-02 13:03:40,768 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2024-12-02 13:03:40,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:40,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:40,768 INFO L206 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] [2024-12-02 13:03:40,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 13:03:40,768 INFO L396 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)] === [2024-12-02 13:03:40,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1798765659, now seen corresponding path program 1 times [2024-12-02 13:03:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239682513] [2024-12-02 13:03:40,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239682513] [2024-12-02 13:03:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239682513] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:03:40,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:03:40,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 13:03:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230123333] [2024-12-02 13:03:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:03:40,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 13:03:40,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:40,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 13:03:40,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 13:03:40,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:03:40,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:40,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:40,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:03:40,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:41,060 INFO L124 PetriNetUnfolderBase]: 790/1155 cut-off events. [2024-12-02 13:03:41,060 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-12-02 13:03:41,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1155 events. 790/1155 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4489 event pairs, 246 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 2556. Up to 576 conditions per place. [2024-12-02 13:03:41,066 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-12-02 13:03:41,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2024-12-02 13:03:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 13:03:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 13:03:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-12-02 13:03:41,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-12-02 13:03:41,068 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2024-12-02 13:03:41,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2024-12-02 13:03:41,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-12-02 13:03:41,069 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2024-12-02 13:03:41,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-12-02 13:03:41,070 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-12-02 13:03:41,070 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2024-12-02 13:03:41,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:41,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:41,070 INFO L206 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] [2024-12-02 13:03:41,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 13:03:41,071 INFO L396 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)] === [2024-12-02 13:03:41,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1453837311, now seen corresponding path program 1 times [2024-12-02 13:03:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:41,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143496341] [2024-12-02 13:03:41,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:41,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:41,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143496341] [2024-12-02 13:03:41,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143496341] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:41,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644604067] [2024-12-02 13:03:41,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:41,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:03:41,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 13:03:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:41,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 13:03:41,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:03:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:41,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:03:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:41,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644604067] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:41,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:03:41,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-12-02 13:03:41,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420640281] [2024-12-02 13:03:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:03:41,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 13:03:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:41,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 13:03:41,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:03:41,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:03:41,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:41,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:41,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:03:41,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:41,579 INFO L124 PetriNetUnfolderBase]: 850/1293 cut-off events. [2024-12-02 13:03:41,579 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2024-12-02 13:03:41,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 1293 events. 850/1293 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5487 event pairs, 256 based on Foata normal form. 0/1239 useless extension candidates. Maximal degree in co-relation 3205. Up to 670 conditions per place. [2024-12-02 13:03:41,586 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-12-02 13:03:41,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2024-12-02 13:03:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 13:03:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 13:03:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-12-02 13:03:41,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-12-02 13:03:41,588 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2024-12-02 13:03:41,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2024-12-02 13:03:41,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:03:41,591 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2024-12-02 13:03:41,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-12-02 13:03:41,592 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-12-02 13:03:41,592 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2024-12-02 13:03:41,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:41,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:41,592 INFO L206 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] [2024-12-02 13:03:41,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 13:03:41,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:41,793 INFO L396 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)] === [2024-12-02 13:03:41,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1520605430, now seen corresponding path program 1 times [2024-12-02 13:03:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231939219] [2024-12-02 13:03:41,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231939219] [2024-12-02 13:03:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231939219] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654507280] [2024-12-02 13:03:42,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:03:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:42,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:42,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:03:42,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 13:03:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:03:42,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 13:03:42,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:03:42,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:03:42,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-12-02 13:03:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:43,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:03:44,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-12-02 13:03:44,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:03:44,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-12-02 13:03:44,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2024-12-02 13:03:44,927 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-12-02 13:03:44,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 103 [2024-12-02 13:03:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654507280] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:03:45,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:03:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-12-02 13:03:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689343748] [2024-12-02 13:03:45,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:03:45,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 13:03:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:45,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 13:03:45,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-12-02 13:03:45,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:03:45,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 24 states, 24 states have (on average 8.708333333333334) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:45,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:45,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:03:45,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:47,270 INFO L124 PetriNetUnfolderBase]: 1841/2761 cut-off events. [2024-12-02 13:03:47,270 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-12-02 13:03:47,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 2761 events. 1841/2761 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12611 event pairs, 106 based on Foata normal form. 1/2760 useless extension candidates. Maximal degree in co-relation 5614. Up to 1375 conditions per place. [2024-12-02 13:03:47,288 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2024-12-02 13:03:47,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2024-12-02 13:03:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 13:03:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 13:03:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2024-12-02 13:03:47,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-12-02 13:03:47,292 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2024-12-02 13:03:47,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2024-12-02 13:03:47,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 13:03:47,299 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2024-12-02 13:03:47,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2024-12-02 13:03:47,300 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2024-12-02 13:03:47,300 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2024-12-02 13:03:47,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.708333333333334) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:47,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:47,300 INFO L206 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] [2024-12-02 13:03:47,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 13:03:47,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:47,501 INFO L396 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)] === [2024-12-02 13:03:47,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1166693480, now seen corresponding path program 2 times [2024-12-02 13:03:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071151776] [2024-12-02 13:03:47,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:03:47,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:47,534 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:03:47,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:48,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071151776] [2024-12-02 13:03:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071151776] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75435224] [2024-12-02 13:03:48,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:03:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:48,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:03:48,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 13:03:48,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:03:48,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:48,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 13:03:48,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:03:48,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:03:48,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-12-02 13:03:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:48,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:03:49,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2024-12-02 13:03:49,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:03:49,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 111 [2024-12-02 13:03:49,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-12-02 13:03:49,337 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-12-02 13:03:49,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2024-12-02 13:03:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75435224] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:03:49,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:03:49,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-12-02 13:03:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948427197] [2024-12-02 13:03:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:03:49,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 13:03:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:49,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 13:03:49,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-12-02 13:03:49,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-12-02 13:03:49,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:49,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:49,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-12-02 13:03:49,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:50,978 INFO L124 PetriNetUnfolderBase]: 2050/3325 cut-off events. [2024-12-02 13:03:50,979 INFO L125 PetriNetUnfolderBase]: For 4824/4824 co-relation queries the response was YES. [2024-12-02 13:03:50,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10778 conditions, 3325 events. 2050/3325 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18014 event pairs, 118 based on Foata normal form. 3/3328 useless extension candidates. Maximal degree in co-relation 10228. Up to 1815 conditions per place. [2024-12-02 13:03:51,001 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 193 selfloop transitions, 121 changer transitions 2/322 dead transitions. [2024-12-02 13:03:51,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 322 transitions, 2167 flow [2024-12-02 13:03:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 13:03:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 13:03:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 474 transitions. [2024-12-02 13:03:51,004 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633431085043988 [2024-12-02 13:03:51,004 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 31 states and 474 transitions. [2024-12-02 13:03:51,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 322 transitions, 2167 flow [2024-12-02 13:03:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 322 transitions, 1959 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-12-02 13:03:51,019 INFO L231 Difference]: Finished difference. Result has 105 places, 182 transitions, 1307 flow [2024-12-02 13:03:51,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1307, PETRI_PLACES=105, PETRI_TRANSITIONS=182} [2024-12-02 13:03:51,020 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-12-02 13:03:51,020 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 182 transitions, 1307 flow [2024-12-02 13:03:51,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:51,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:51,020 INFO L206 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] [2024-12-02 13:03:51,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 13:03:51,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:51,221 INFO L396 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)] === [2024-12-02 13:03:51,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1312961448, now seen corresponding path program 3 times [2024-12-02 13:03:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:51,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943271054] [2024-12-02 13:03:51,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:03:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:51,239 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:03:51,239 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:51,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:51,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943271054] [2024-12-02 13:03:51,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943271054] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:51,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268780040] [2024-12-02 13:03:51,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:03:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:51,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:03:51,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 13:03:51,681 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:03:51,682 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:51,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 13:03:51,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:03:51,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:03:51,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-12-02 13:03:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:51,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:03:52,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2024-12-02 13:03:52,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:03:52,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2024-12-02 13:03:52,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-12-02 13:03:52,698 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:03:52,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 1 [2024-12-02 13:03:52,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-12-02 13:03:52,708 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:03:52,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 1 [2024-12-02 13:03:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:52,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268780040] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:03:52,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:03:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-12-02 13:03:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316832878] [2024-12-02 13:03:52,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:03:52,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 13:03:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:52,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 13:03:52,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-12-02 13:03:52,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-12-02 13:03:52,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 182 transitions, 1307 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:52,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:52,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-12-02 13:03:52,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:54,836 INFO L124 PetriNetUnfolderBase]: 3977/6435 cut-off events. [2024-12-02 13:03:54,836 INFO L125 PetriNetUnfolderBase]: For 17242/17284 co-relation queries the response was YES. [2024-12-02 13:03:54,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24733 conditions, 6435 events. 3977/6435 cut-off events. For 17242/17284 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39321 event pairs, 261 based on Foata normal form. 33/6468 useless extension candidates. Maximal degree in co-relation 23595. Up to 2818 conditions per place. [2024-12-02 13:03:54,872 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 242 selfloop transitions, 255 changer transitions 2/505 dead transitions. [2024-12-02 13:03:54,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 505 transitions, 4211 flow [2024-12-02 13:03:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 13:03:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-12-02 13:03:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 542 transitions. [2024-12-02 13:03:54,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4692640692640693 [2024-12-02 13:03:54,875 INFO L175 Difference]: Start difference. First operand has 105 places, 182 transitions, 1307 flow. Second operand 35 states and 542 transitions. [2024-12-02 13:03:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 505 transitions, 4211 flow [2024-12-02 13:03:54,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 505 transitions, 4018 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-12-02 13:03:54,956 INFO L231 Difference]: Finished difference. Result has 149 places, 342 transitions, 3150 flow [2024-12-02 13:03:54,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3150, PETRI_PLACES=149, PETRI_TRANSITIONS=342} [2024-12-02 13:03:54,957 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 114 predicate places. [2024-12-02 13:03:54,957 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 342 transitions, 3150 flow [2024-12-02 13:03:54,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:54,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:54,958 INFO L206 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] [2024-12-02 13:03:54,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 13:03:55,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 13:03:55,159 INFO L396 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)] === [2024-12-02 13:03:55,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1638273708, now seen corresponding path program 4 times [2024-12-02 13:03:55,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:55,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91673573] [2024-12-02 13:03:55,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:03:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:55,178 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:03:55,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:03:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:03:55,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91673573] [2024-12-02 13:03:55,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91673573] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:03:55,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448195042] [2024-12-02 13:03:55,537 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:03:55,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:03:55,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:03:55,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 13:03:55,609 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:03:55,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:03:55,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 13:03:55,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:03:55,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:03:55,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-12-02 13:03:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:55,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:03:56,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2024-12-02 13:03:56,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 13:03:56,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2024-12-02 13:03:56,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-12-02 13:03:56,814 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:03:56,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 1 [2024-12-02 13:03:56,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-12-02 13:03:56,826 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:03:56,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 1 [2024-12-02 13:03:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:03:56,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448195042] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:03:56,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:03:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-12-02 13:03:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989145757] [2024-12-02 13:03:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:03:56,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 13:03:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:03:56,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 13:03:56,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-12-02 13:03:56,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:03:56,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 342 transitions, 3150 flow. Second operand has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:56,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:03:56,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:03:56,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:03:59,308 INFO L124 PetriNetUnfolderBase]: 5904/9409 cut-off events. [2024-12-02 13:03:59,308 INFO L125 PetriNetUnfolderBase]: For 32695/32719 co-relation queries the response was YES. [2024-12-02 13:03:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39767 conditions, 9409 events. 5904/9409 cut-off events. For 32695/32719 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 60840 event pairs, 1200 based on Foata normal form. 11/9419 useless extension candidates. Maximal degree in co-relation 38621. Up to 6934 conditions per place. [2024-12-02 13:03:59,362 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 369 selfloop transitions, 156 changer transitions 2/532 dead transitions. [2024-12-02 13:03:59,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 532 transitions, 5387 flow [2024-12-02 13:03:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 13:03:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-12-02 13:03:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 435 transitions. [2024-12-02 13:03:59,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2024-12-02 13:03:59,365 INFO L175 Difference]: Start difference. First operand has 149 places, 342 transitions, 3150 flow. Second operand 33 states and 435 transitions. [2024-12-02 13:03:59,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 532 transitions, 5387 flow [2024-12-02 13:03:59,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 532 transitions, 5160 flow, removed 60 selfloop flow, removed 12 redundant places. [2024-12-02 13:03:59,477 INFO L231 Difference]: Finished difference. Result has 178 places, 417 transitions, 4103 flow [2024-12-02 13:03:59,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4103, PETRI_PLACES=178, PETRI_TRANSITIONS=417} [2024-12-02 13:03:59,478 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 143 predicate places. [2024-12-02 13:03:59,478 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 417 transitions, 4103 flow [2024-12-02 13:03:59,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:03:59,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:03:59,478 INFO L206 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] [2024-12-02 13:03:59,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 13:03:59,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:03:59,679 INFO L396 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)] === [2024-12-02 13:03:59,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:03:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1192556332, now seen corresponding path program 5 times [2024-12-02 13:03:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:03:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493305215] [2024-12-02 13:03:59,679 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:03:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:03:59,697 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:03:59,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:00,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:00,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493305215] [2024-12-02 13:04:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493305215] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94098453] [2024-12-02 13:04:00,160 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:04:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:00,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:00,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 13:04:00,234 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:00,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:00,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 13:04:00,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:00,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 13:04:00,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2024-12-02 13:04:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:00,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:01,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-12-02 13:04:01,233 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 13:04:01,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-12-02 13:04:01,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2024-12-02 13:04:01,302 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 13:04:01,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2024-12-02 13:04:01,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-12-02 13:04:01,440 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 13:04:01,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 1 [2024-12-02 13:04:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94098453] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:01,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:01,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2024-12-02 13:04:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919865482] [2024-12-02 13:04:01,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:01,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 13:04:01,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:01,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 13:04:01,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-12-02 13:04:01,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-12-02 13:04:01,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 417 transitions, 4103 flow. Second operand has 26 states, 26 states have (on average 9.461538461538462) internal successors, (246), 26 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:01,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:01,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-12-02 13:04:01,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:04,932 INFO L124 PetriNetUnfolderBase]: 5247/8534 cut-off events. [2024-12-02 13:04:04,932 INFO L125 PetriNetUnfolderBase]: For 36591/36615 co-relation queries the response was YES. [2024-12-02 13:04:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38709 conditions, 8534 events. 5247/8534 cut-off events. For 36591/36615 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 55652 event pairs, 251 based on Foata normal form. 17/8551 useless extension candidates. Maximal degree in co-relation 38413. Up to 2445 conditions per place. [2024-12-02 13:04:05,012 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 260 selfloop transitions, 464 changer transitions 2/732 dead transitions. [2024-12-02 13:04:05,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 732 transitions, 7762 flow [2024-12-02 13:04:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 13:04:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-12-02 13:04:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 708 transitions. [2024-12-02 13:04:05,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-12-02 13:04:05,015 INFO L175 Difference]: Start difference. First operand has 178 places, 417 transitions, 4103 flow. Second operand 48 states and 708 transitions. [2024-12-02 13:04:05,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 732 transitions, 7762 flow [2024-12-02 13:04:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 732 transitions, 7441 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-12-02 13:04:05,152 INFO L231 Difference]: Finished difference. Result has 222 places, 531 transitions, 6181 flow [2024-12-02 13:04:05,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6181, PETRI_PLACES=222, PETRI_TRANSITIONS=531} [2024-12-02 13:04:05,153 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-12-02 13:04:05,153 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 531 transitions, 6181 flow [2024-12-02 13:04:05,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.461538461538462) internal successors, (246), 26 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:05,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:05,153 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:05,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 13:04:05,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:05,354 INFO L396 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)] === [2024-12-02 13:04:05,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2045159708, now seen corresponding path program 6 times [2024-12-02 13:04:05,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049381720] [2024-12-02 13:04:05,355 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:04:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:05,370 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:04:05,370 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:05,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049381720] [2024-12-02 13:04:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049381720] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179907722] [2024-12-02 13:04:05,465 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:04:05,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:05,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:05,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 13:04:05,539 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:04:05,540 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:05,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:04:05,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:05,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:05,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179907722] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:05,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-12-02 13:04:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328344440] [2024-12-02 13:04:05,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:05,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 13:04:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:05,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 13:04:05,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:04:05,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:05,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 531 transitions, 6181 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:05,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:05,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:05,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:08,995 INFO L124 PetriNetUnfolderBase]: 13902/20479 cut-off events. [2024-12-02 13:04:08,996 INFO L125 PetriNetUnfolderBase]: For 127475/127475 co-relation queries the response was YES. [2024-12-02 13:04:09,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101328 conditions, 20479 events. 13902/20479 cut-off events. For 127475/127475 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 131945 event pairs, 1950 based on Foata normal form. 12/20488 useless extension candidates. Maximal degree in co-relation 100976. Up to 5609 conditions per place. [2024-12-02 13:04:09,180 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 1360 selfloop transitions, 155 changer transitions 0/1518 dead transitions. [2024-12-02 13:04:09,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1518 transitions, 20064 flow [2024-12-02 13:04:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 13:04:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-12-02 13:04:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 314 transitions. [2024-12-02 13:04:09,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2024-12-02 13:04:09,182 INFO L175 Difference]: Start difference. First operand has 222 places, 531 transitions, 6181 flow. Second operand 20 states and 314 transitions. [2024-12-02 13:04:09,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1518 transitions, 20064 flow [2024-12-02 13:04:09,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1518 transitions, 18081 flow, removed 707 selfloop flow, removed 32 redundant places. [2024-12-02 13:04:09,857 INFO L231 Difference]: Finished difference. Result has 216 places, 631 transitions, 7042 flow [2024-12-02 13:04:09,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7042, PETRI_PLACES=216, PETRI_TRANSITIONS=631} [2024-12-02 13:04:09,858 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-12-02 13:04:09,858 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 631 transitions, 7042 flow [2024-12-02 13:04:09,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:09,858 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:09,858 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:09,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 13:04:10,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:10,059 INFO L396 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)] === [2024-12-02 13:04:10,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1489966542, now seen corresponding path program 7 times [2024-12-02 13:04:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214445442] [2024-12-02 13:04:10,060 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:04:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:10,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214445442] [2024-12-02 13:04:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214445442] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037314210] [2024-12-02 13:04:10,145 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:04:10,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:10,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:10,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:10,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 13:04:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:10,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:04:10,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:10,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037314210] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:04:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-12-02 13:04:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885121512] [2024-12-02 13:04:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:04:10,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 13:04:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:10,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 13:04:10,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:04:10,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:04:10,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 631 transitions, 7042 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:10,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:10,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:04:10,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:13,115 INFO L124 PetriNetUnfolderBase]: 13609/20258 cut-off events. [2024-12-02 13:04:13,116 INFO L125 PetriNetUnfolderBase]: For 140491/140965 co-relation queries the response was YES. [2024-12-02 13:04:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101984 conditions, 20258 events. 13609/20258 cut-off events. For 140491/140965 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 133544 event pairs, 2396 based on Foata normal form. 393/20486 useless extension candidates. Maximal degree in co-relation 101820. Up to 7076 conditions per place. [2024-12-02 13:04:13,270 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 814 selfloop transitions, 77 changer transitions 0/911 dead transitions. [2024-12-02 13:04:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 911 transitions, 11679 flow [2024-12-02 13:04:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 13:04:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 13:04:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-12-02 13:04:13,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-12-02 13:04:13,271 INFO L175 Difference]: Start difference. First operand has 216 places, 631 transitions, 7042 flow. Second operand 8 states and 144 transitions. [2024-12-02 13:04:13,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 911 transitions, 11679 flow [2024-12-02 13:04:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 911 transitions, 11471 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-12-02 13:04:14,117 INFO L231 Difference]: Finished difference. Result has 222 places, 640 transitions, 7276 flow [2024-12-02 13:04:14,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7276, PETRI_PLACES=222, PETRI_TRANSITIONS=640} [2024-12-02 13:04:14,118 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-12-02 13:04:14,118 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 640 transitions, 7276 flow [2024-12-02 13:04:14,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:14,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:14,118 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:14,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 13:04:14,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:14,318 INFO L396 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)] === [2024-12-02 13:04:14,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1954868333, now seen corresponding path program 8 times [2024-12-02 13:04:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:14,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577976207] [2024-12-02 13:04:14,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:04:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:14,330 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:14,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:14,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577976207] [2024-12-02 13:04:14,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577976207] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386406957] [2024-12-02 13:04:14,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:04:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:14,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 13:04:14,610 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:14,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:14,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:04:14,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:14,702 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:04:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386406957] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:04:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:04:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2024-12-02 13:04:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997040280] [2024-12-02 13:04:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:04:14,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:04:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:14,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:04:14,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-12-02 13:04:14,718 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:14,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 640 transitions, 7276 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:14,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:14,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:14,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:18,829 INFO L124 PetriNetUnfolderBase]: 19847/29484 cut-off events. [2024-12-02 13:04:18,830 INFO L125 PetriNetUnfolderBase]: For 154274/154543 co-relation queries the response was YES. [2024-12-02 13:04:19,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143946 conditions, 29484 events. 19847/29484 cut-off events. For 154274/154543 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 200463 event pairs, 5216 based on Foata normal form. 108/29520 useless extension candidates. Maximal degree in co-relation 141457. Up to 13801 conditions per place. [2024-12-02 13:04:19,136 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 1205 selfloop transitions, 113 changer transitions 0/1330 dead transitions. [2024-12-02 13:04:19,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1330 transitions, 17982 flow [2024-12-02 13:04:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 13:04:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 13:04:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-12-02 13:04:19,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-12-02 13:04:19,137 INFO L175 Difference]: Start difference. First operand has 222 places, 640 transitions, 7276 flow. Second operand 12 states and 187 transitions. [2024-12-02 13:04:19,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1330 transitions, 17982 flow [2024-12-02 13:04:20,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1330 transitions, 17977 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 13:04:20,618 INFO L231 Difference]: Finished difference. Result has 241 places, 708 transitions, 8655 flow [2024-12-02 13:04:20,618 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8655, PETRI_PLACES=241, PETRI_TRANSITIONS=708} [2024-12-02 13:04:20,619 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 206 predicate places. [2024-12-02 13:04:20,619 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 708 transitions, 8655 flow [2024-12-02 13:04:20,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:20,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:20,619 INFO L206 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] [2024-12-02 13:04:20,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 13:04:20,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:20,820 INFO L396 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)] === [2024-12-02 13:04:20,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2032025704, now seen corresponding path program 1 times [2024-12-02 13:04:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:20,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578511956] [2024-12-02 13:04:20,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:04:20,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:20,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:20,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578511956] [2024-12-02 13:04:20,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578511956] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944941913] [2024-12-02 13:04:20,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 13:04:20,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:20,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:20,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:20,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 13:04:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:20,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:04:20,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:21,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944941913] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:21,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-12-02 13:04:21,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432746982] [2024-12-02 13:04:21,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:21,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 13:04:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:21,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 13:04:21,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-12-02 13:04:21,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:04:21,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 708 transitions, 8655 flow. Second operand has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 13 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:21,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:21,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:04:21,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:22,953 INFO L124 PetriNetUnfolderBase]: 7680/12280 cut-off events. [2024-12-02 13:04:22,954 INFO L125 PetriNetUnfolderBase]: For 91285/91479 co-relation queries the response was YES. [2024-12-02 13:04:23,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65228 conditions, 12280 events. 7680/12280 cut-off events. For 91285/91479 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 83724 event pairs, 3485 based on Foata normal form. 484/12682 useless extension candidates. Maximal degree in co-relation 65157. Up to 7374 conditions per place. [2024-12-02 13:04:23,056 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 528 selfloop transitions, 16 changer transitions 0/561 dead transitions. [2024-12-02 13:04:23,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 561 transitions, 8068 flow [2024-12-02 13:04:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 13:04:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 13:04:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-12-02 13:04:23,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-12-02 13:04:23,057 INFO L175 Difference]: Start difference. First operand has 241 places, 708 transitions, 8655 flow. Second operand 6 states and 98 transitions. [2024-12-02 13:04:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 561 transitions, 8068 flow [2024-12-02 13:04:23,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 561 transitions, 7647 flow, removed 137 selfloop flow, removed 10 redundant places. [2024-12-02 13:04:23,489 INFO L231 Difference]: Finished difference. Result has 220 places, 428 transitions, 5090 flow [2024-12-02 13:04:23,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5090, PETRI_PLACES=220, PETRI_TRANSITIONS=428} [2024-12-02 13:04:23,490 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-12-02 13:04:23,490 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 428 transitions, 5090 flow [2024-12-02 13:04:23,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.615384615384615) internal successors, (125), 13 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:23,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:23,490 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:23,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 13:04:23,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 13:04:23,690 INFO L396 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)] === [2024-12-02 13:04:23,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1117684093, now seen corresponding path program 9 times [2024-12-02 13:04:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005176094] [2024-12-02 13:04:23,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:04:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:23,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:04:23,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005176094] [2024-12-02 13:04:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005176094] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680840880] [2024-12-02 13:04:23,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:04:23,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:23,768 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:23,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 13:04:23,841 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:04:23,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:23,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:04:23,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:23,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680840880] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:23,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 13:04:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505105138] [2024-12-02 13:04:23,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:23,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:04:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:23,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:04:23,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:04:23,956 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:04:23,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 428 transitions, 5090 flow. Second operand has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:23,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:23,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:04:23,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:25,479 INFO L124 PetriNetUnfolderBase]: 8373/13120 cut-off events. [2024-12-02 13:04:25,480 INFO L125 PetriNetUnfolderBase]: For 101720/101905 co-relation queries the response was YES. [2024-12-02 13:04:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68601 conditions, 13120 events. 8373/13120 cut-off events. For 101720/101905 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 86919 event pairs, 3726 based on Foata normal form. 313/13312 useless extension candidates. Maximal degree in co-relation 68536. Up to 8691 conditions per place. [2024-12-02 13:04:25,587 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 380 selfloop transitions, 60 changer transitions 0/456 dead transitions. [2024-12-02 13:04:25,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 456 transitions, 6115 flow [2024-12-02 13:04:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:04:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 13:04:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-12-02 13:04:25,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-12-02 13:04:25,588 INFO L175 Difference]: Start difference. First operand has 220 places, 428 transitions, 5090 flow. Second operand 7 states and 115 transitions. [2024-12-02 13:04:25,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 456 transitions, 6115 flow [2024-12-02 13:04:26,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 456 transitions, 5973 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-12-02 13:04:26,196 INFO L231 Difference]: Finished difference. Result has 221 places, 399 transitions, 4802 flow [2024-12-02 13:04:26,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=221, PETRI_TRANSITIONS=399} [2024-12-02 13:04:26,196 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 186 predicate places. [2024-12-02 13:04:26,196 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 399 transitions, 4802 flow [2024-12-02 13:04:26,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:26,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:26,197 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:26,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 13:04:26,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 13:04:26,397 INFO L396 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)] === [2024-12-02 13:04:26,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1133572491, now seen corresponding path program 10 times [2024-12-02 13:04:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:26,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270252549] [2024-12-02 13:04:26,398 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:04:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:26,403 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:04:26,403 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:26,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270252549] [2024-12-02 13:04:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270252549] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:04:26,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:04:26,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 13:04:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010743433] [2024-12-02 13:04:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:04:26,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 13:04:26,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:26,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 13:04:26,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 13:04:26,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:26,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 399 transitions, 4802 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:26,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:26,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:26,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:28,978 INFO L124 PetriNetUnfolderBase]: 15753/23258 cut-off events. [2024-12-02 13:04:28,978 INFO L125 PetriNetUnfolderBase]: For 132885/132969 co-relation queries the response was YES. [2024-12-02 13:04:29,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113899 conditions, 23258 events. 15753/23258 cut-off events. For 132885/132969 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 147494 event pairs, 2948 based on Foata normal form. 40/23259 useless extension candidates. Maximal degree in co-relation 113836. Up to 7543 conditions per place. [2024-12-02 13:04:29,176 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 576 selfloop transitions, 133 changer transitions 12/728 dead transitions. [2024-12-02 13:04:29,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 728 transitions, 9256 flow [2024-12-02 13:04:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 13:04:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 13:04:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-12-02 13:04:29,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4983164983164983 [2024-12-02 13:04:29,177 INFO L175 Difference]: Start difference. First operand has 221 places, 399 transitions, 4802 flow. Second operand 9 states and 148 transitions. [2024-12-02 13:04:29,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 728 transitions, 9256 flow [2024-12-02 13:04:30,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 728 transitions, 9141 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-12-02 13:04:30,180 INFO L231 Difference]: Finished difference. Result has 227 places, 430 transitions, 5504 flow [2024-12-02 13:04:30,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5504, PETRI_PLACES=227, PETRI_TRANSITIONS=430} [2024-12-02 13:04:30,180 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 192 predicate places. [2024-12-02 13:04:30,180 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 430 transitions, 5504 flow [2024-12-02 13:04:30,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:30,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:30,180 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 13:04:30,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 13:04:30,181 INFO L396 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)] === [2024-12-02 13:04:30,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1863629265, now seen corresponding path program 11 times [2024-12-02 13:04:30,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905441251] [2024-12-02 13:04:30,181 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:04:30,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:30,188 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:30,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905441251] [2024-12-02 13:04:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905441251] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599536776] [2024-12-02 13:04:30,243 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:04:30,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:30,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:30,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 13:04:30,313 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:30,313 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:30,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 13:04:30,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:30,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 13:04:30,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599536776] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:30,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:30,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 13:04:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909926288] [2024-12-02 13:04:30,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:30,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:04:30,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:30,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:04:30,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:04:30,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-12-02 13:04:30,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 430 transitions, 5504 flow. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 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) [2024-12-02 13:04:30,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:30,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-12-02 13:04:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:32,877 INFO L124 PetriNetUnfolderBase]: 10146/15656 cut-off events. [2024-12-02 13:04:32,877 INFO L125 PetriNetUnfolderBase]: For 104975/105029 co-relation queries the response was YES. [2024-12-02 13:04:32,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80227 conditions, 15656 events. 10146/15656 cut-off events. For 104975/105029 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 104915 event pairs, 4467 based on Foata normal form. 318/15922 useless extension candidates. Maximal degree in co-relation 80162. Up to 12025 conditions per place. [2024-12-02 13:04:33,036 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 268 selfloop transitions, 3 changer transitions 169/451 dead transitions. [2024-12-02 13:04:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 451 transitions, 6622 flow [2024-12-02 13:04:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 13:04:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 13:04:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-12-02 13:04:33,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-12-02 13:04:33,037 INFO L175 Difference]: Start difference. First operand has 227 places, 430 transitions, 5504 flow. Second operand 7 states and 110 transitions. [2024-12-02 13:04:33,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 451 transitions, 6622 flow [2024-12-02 13:04:34,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 451 transitions, 6523 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-12-02 13:04:34,194 INFO L231 Difference]: Finished difference. Result has 230 places, 282 transitions, 3231 flow [2024-12-02 13:04:34,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3231, PETRI_PLACES=230, PETRI_TRANSITIONS=282} [2024-12-02 13:04:34,194 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 195 predicate places. [2024-12-02 13:04:34,195 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 282 transitions, 3231 flow [2024-12-02 13:04:34,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 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) [2024-12-02 13:04:34,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:34,195 INFO L206 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] [2024-12-02 13:04:34,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 13:04:34,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 13:04:34,395 INFO L396 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)] === [2024-12-02 13:04:34,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:34,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1463506721, now seen corresponding path program 12 times [2024-12-02 13:04:34,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:34,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634458666] [2024-12-02 13:04:34,396 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:04:34,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:34,412 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:04:34,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:04:34,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634458666] [2024-12-02 13:04:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634458666] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710837491] [2024-12-02 13:04:34,509 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:04:34,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:34,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 13:04:34,578 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:04:34,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:34,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:04:34,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:34,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710837491] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:34,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:04:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2024-12-02 13:04:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570661145] [2024-12-02 13:04:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:04:34,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:04:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:34,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:04:34,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:04:34,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:34,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 282 transitions, 3231 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:34,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:34,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:36,824 INFO L124 PetriNetUnfolderBase]: 10959/16030 cut-off events. [2024-12-02 13:04:36,824 INFO L125 PetriNetUnfolderBase]: For 84666/84670 co-relation queries the response was YES. [2024-12-02 13:04:36,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77385 conditions, 16030 events. 10959/16030 cut-off events. For 84666/84670 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 97993 event pairs, 1108 based on Foata normal form. 42/16070 useless extension candidates. Maximal degree in co-relation 77320. Up to 6622 conditions per place. [2024-12-02 13:04:36,974 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 499 selfloop transitions, 91 changer transitions 0/595 dead transitions. [2024-12-02 13:04:36,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 595 transitions, 7644 flow [2024-12-02 13:04:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 13:04:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 13:04:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-12-02 13:04:36,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-12-02 13:04:36,975 INFO L175 Difference]: Start difference. First operand has 230 places, 282 transitions, 3231 flow. Second operand 12 states and 185 transitions. [2024-12-02 13:04:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 595 transitions, 7644 flow [2024-12-02 13:04:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 595 transitions, 7039 flow, removed 170 selfloop flow, removed 18 redundant places. [2024-12-02 13:04:37,672 INFO L231 Difference]: Finished difference. Result has 189 places, 308 transitions, 3493 flow [2024-12-02 13:04:37,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3493, PETRI_PLACES=189, PETRI_TRANSITIONS=308} [2024-12-02 13:04:37,673 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-12-02 13:04:37,673 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 308 transitions, 3493 flow [2024-12-02 13:04:37,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:37,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:37,673 INFO L206 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] [2024-12-02 13:04:37,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 13:04:37,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 13:04:37,873 INFO L396 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)] === [2024-12-02 13:04:37,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash 263555363, now seen corresponding path program 13 times [2024-12-02 13:04:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695827518] [2024-12-02 13:04:37,874 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:04:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:37,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:37,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695827518] [2024-12-02 13:04:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695827518] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:37,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365627125] [2024-12-02 13:04:37,965 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:04:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:37,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:37,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 13:04:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:04:38,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:04:38,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:38,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:38,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365627125] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:38,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:38,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-12-02 13:04:38,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672134031] [2024-12-02 13:04:38,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:38,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 13:04:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:38,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 13:04:38,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-12-02 13:04:38,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 308 transitions, 3493 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:40,094 INFO L124 PetriNetUnfolderBase]: 11137/16303 cut-off events. [2024-12-02 13:04:40,094 INFO L125 PetriNetUnfolderBase]: For 98264/98264 co-relation queries the response was YES. [2024-12-02 13:04:40,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83264 conditions, 16303 events. 11137/16303 cut-off events. For 98264/98264 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 100437 event pairs, 1692 based on Foata normal form. 92/16385 useless extension candidates. Maximal degree in co-relation 83207. Up to 6870 conditions per place. [2024-12-02 13:04:40,237 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 395 selfloop transitions, 112 changer transitions 0/512 dead transitions. [2024-12-02 13:04:40,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 512 transitions, 6559 flow [2024-12-02 13:04:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 13:04:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 13:04:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 177 transitions. [2024-12-02 13:04:40,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4125874125874126 [2024-12-02 13:04:40,238 INFO L175 Difference]: Start difference. First operand has 189 places, 308 transitions, 3493 flow. Second operand 13 states and 177 transitions. [2024-12-02 13:04:40,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 512 transitions, 6559 flow [2024-12-02 13:04:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 512 transitions, 6249 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-12-02 13:04:40,936 INFO L231 Difference]: Finished difference. Result has 197 places, 329 transitions, 3813 flow [2024-12-02 13:04:40,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3813, PETRI_PLACES=197, PETRI_TRANSITIONS=329} [2024-12-02 13:04:40,936 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-12-02 13:04:40,936 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 329 transitions, 3813 flow [2024-12-02 13:04:40,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:40,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:40,936 INFO L206 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] [2024-12-02 13:04:40,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 13:04:41,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 13:04:41,137 INFO L396 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)] === [2024-12-02 13:04:41,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1697522005, now seen corresponding path program 14 times [2024-12-02 13:04:41,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:41,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772087860] [2024-12-02 13:04:41,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:04:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:41,147 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:41,147 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:04:41,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:41,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772087860] [2024-12-02 13:04:41,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772087860] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:41,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511513820] [2024-12-02 13:04:41,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:04:41,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:41,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:41,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 13:04:41,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:04:41,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:41,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:04:41,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:41,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:41,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511513820] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:41,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:04:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 21 [2024-12-02 13:04:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198215461] [2024-12-02 13:04:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:04:41,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:04:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:41,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:04:41,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-12-02 13:04:41,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:41,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 329 transitions, 3813 flow. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:41,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:41,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:41,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:43,507 INFO L124 PetriNetUnfolderBase]: 12317/18077 cut-off events. [2024-12-02 13:04:43,507 INFO L125 PetriNetUnfolderBase]: For 113029/113029 co-relation queries the response was YES. [2024-12-02 13:04:43,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93824 conditions, 18077 events. 12317/18077 cut-off events. For 113029/113029 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 113721 event pairs, 1731 based on Foata normal form. 17/18092 useless extension candidates. Maximal degree in co-relation 93766. Up to 7658 conditions per place. [2024-12-02 13:04:43,675 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 495 selfloop transitions, 124 changer transitions 0/624 dead transitions. [2024-12-02 13:04:43,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 624 transitions, 8096 flow [2024-12-02 13:04:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 13:04:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 13:04:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-12-02 13:04:43,676 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45179063360881544 [2024-12-02 13:04:43,676 INFO L175 Difference]: Start difference. First operand has 197 places, 329 transitions, 3813 flow. Second operand 11 states and 164 transitions. [2024-12-02 13:04:43,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 624 transitions, 8096 flow [2024-12-02 13:04:44,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 624 transitions, 7987 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-12-02 13:04:44,979 INFO L231 Difference]: Finished difference. Result has 207 places, 355 transitions, 4546 flow [2024-12-02 13:04:44,979 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4546, PETRI_PLACES=207, PETRI_TRANSITIONS=355} [2024-12-02 13:04:44,980 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 172 predicate places. [2024-12-02 13:04:44,980 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 355 transitions, 4546 flow [2024-12-02 13:04:44,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:44,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:44,980 INFO L206 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] [2024-12-02 13:04:44,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 13:04:45,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:45,180 INFO L396 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)] === [2024-12-02 13:04:45,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -675582659, now seen corresponding path program 15 times [2024-12-02 13:04:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:45,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666902927] [2024-12-02 13:04:45,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:04:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:45,190 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:04:45,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:45,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:45,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666902927] [2024-12-02 13:04:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666902927] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:45,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46569704] [2024-12-02 13:04:45,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:04:45,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:45,272 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:45,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 13:04:45,336 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:04:45,336 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:45,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:04:45,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:45,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:04:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46569704] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:45,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:45,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-12-02 13:04:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940651399] [2024-12-02 13:04:45,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:45,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 13:04:45,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:45,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 13:04:45,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:04:45,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:04:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 355 transitions, 4546 flow. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:45,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:04:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:48,628 INFO L124 PetriNetUnfolderBase]: 15800/22898 cut-off events. [2024-12-02 13:04:48,629 INFO L125 PetriNetUnfolderBase]: For 162317/162317 co-relation queries the response was YES. [2024-12-02 13:04:48,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126174 conditions, 22898 events. 15800/22898 cut-off events. For 162317/162317 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 145702 event pairs, 1527 based on Foata normal form. 42/22932 useless extension candidates. Maximal degree in co-relation 126112. Up to 10060 conditions per place. [2024-12-02 13:04:48,874 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 747 selfloop transitions, 233 changer transitions 0/985 dead transitions. [2024-12-02 13:04:48,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 985 transitions, 12825 flow [2024-12-02 13:04:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 13:04:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-12-02 13:04:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 409 transitions. [2024-12-02 13:04:48,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4590347923681257 [2024-12-02 13:04:48,875 INFO L175 Difference]: Start difference. First operand has 207 places, 355 transitions, 4546 flow. Second operand 27 states and 409 transitions. [2024-12-02 13:04:48,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 985 transitions, 12825 flow [2024-12-02 13:04:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 985 transitions, 12731 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-12-02 13:04:50,382 INFO L231 Difference]: Finished difference. Result has 236 places, 455 transitions, 6789 flow [2024-12-02 13:04:50,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6789, PETRI_PLACES=236, PETRI_TRANSITIONS=455} [2024-12-02 13:04:50,383 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 201 predicate places. [2024-12-02 13:04:50,383 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 455 transitions, 6789 flow [2024-12-02 13:04:50,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:50,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:04:50,383 INFO L206 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] [2024-12-02 13:04:50,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 13:04:50,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:50,584 INFO L396 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)] === [2024-12-02 13:04:50,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:04:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash 269667871, now seen corresponding path program 16 times [2024-12-02 13:04:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:04:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199966172] [2024-12-02 13:04:50,584 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:04:50,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:04:50,592 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:04:50,593 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:04:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:04:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199966172] [2024-12-02 13:04:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199966172] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:04:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068934458] [2024-12-02 13:04:50,643 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:04:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:04:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:04:50,645 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:04:50,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 13:04:50,702 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:04:50,702 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:04:50,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:04:50,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:04:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:04:50,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:04:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:04:50,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068934458] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:04:50,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:04:50,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-02 13:04:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163691903] [2024-12-02 13:04:50,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:04:50,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 13:04:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:04:50,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 13:04:50,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-12-02 13:04:50,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-12-02 13:04:50,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 455 transitions, 6789 flow. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:04:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:04:50,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-12-02 13:04:50,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:04:58,160 INFO L124 PetriNetUnfolderBase]: 29911/42357 cut-off events. [2024-12-02 13:04:58,160 INFO L125 PetriNetUnfolderBase]: For 384064/384064 co-relation queries the response was YES. [2024-12-02 13:04:58,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247466 conditions, 42357 events. 29911/42357 cut-off events. For 384064/384064 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 261826 event pairs, 762 based on Foata normal form. 14/42371 useless extension candidates. Maximal degree in co-relation 247398. Up to 16873 conditions per place. [2024-12-02 13:04:58,575 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 981 selfloop transitions, 1219 changer transitions 0/2201 dead transitions. [2024-12-02 13:04:58,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 2201 transitions, 32693 flow [2024-12-02 13:04:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-12-02 13:04:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2024-12-02 13:04:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1012 transitions. [2024-12-02 13:04:58,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3786008230452675 [2024-12-02 13:04:58,578 INFO L175 Difference]: Start difference. First operand has 236 places, 455 transitions, 6789 flow. Second operand 81 states and 1012 transitions. [2024-12-02 13:04:58,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 2201 transitions, 32693 flow [2024-12-02 13:05:06,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 2201 transitions, 30256 flow, removed 844 selfloop flow, removed 6 redundant places. [2024-12-02 13:05:06,862 INFO L231 Difference]: Finished difference. Result has 336 places, 1474 transitions, 23656 flow [2024-12-02 13:05:06,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=23656, PETRI_PLACES=336, PETRI_TRANSITIONS=1474} [2024-12-02 13:05:06,863 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 301 predicate places. [2024-12-02 13:05:06,863 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 1474 transitions, 23656 flow [2024-12-02 13:05:06,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:05:06,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:06,863 INFO L206 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] [2024-12-02 13:05:06,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 13:05:07,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 13:05:07,064 INFO L396 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)] === [2024-12-02 13:05:07,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1196180189, now seen corresponding path program 17 times [2024-12-02 13:05:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809412987] [2024-12-02 13:05:07,064 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:05:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:07,071 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:05:07,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:05:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:05:07,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:07,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809412987] [2024-12-02 13:05:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809412987] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:05:07,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596882245] [2024-12-02 13:05:07,135 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:05:07,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:05:07,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:05:07,137 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:05:07,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 13:05:07,203 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:05:07,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:05:07,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:05:07,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:05:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:05:07,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 13:05:07,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596882245] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:07,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 13:05:07,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2024-12-02 13:05:07,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328795738] [2024-12-02 13:05:07,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:07,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:05:07,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:07,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:05:07,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-12-02 13:05:07,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:05:07,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1474 transitions, 23656 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:05:07,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:07,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:05:07,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:17,499 INFO L124 PetriNetUnfolderBase]: 33395/47509 cut-off events. [2024-12-02 13:05:17,499 INFO L125 PetriNetUnfolderBase]: For 541823/543216 co-relation queries the response was YES. [2024-12-02 13:05:17,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298280 conditions, 47509 events. 33395/47509 cut-off events. For 541823/543216 co-relation queries the response was YES. Maximal size of possible extension queue 1728. Compared 307123 event pairs, 9898 based on Foata normal form. 150/47285 useless extension candidates. Maximal degree in co-relation 298186. Up to 26367 conditions per place. [2024-12-02 13:05:18,129 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 1426 selfloop transitions, 386 changer transitions 3/1971 dead transitions. [2024-12-02 13:05:18,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1971 transitions, 33947 flow [2024-12-02 13:05:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 13:05:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 13:05:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-12-02 13:05:18,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2024-12-02 13:05:18,130 INFO L175 Difference]: Start difference. First operand has 336 places, 1474 transitions, 23656 flow. Second operand 10 states and 152 transitions. [2024-12-02 13:05:18,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1971 transitions, 33947 flow [2024-12-02 13:05:30,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1971 transitions, 33074 flow, removed 316 selfloop flow, removed 1 redundant places. [2024-12-02 13:05:30,975 INFO L231 Difference]: Finished difference. Result has 351 places, 1660 transitions, 27523 flow [2024-12-02 13:05:30,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=23050, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27523, PETRI_PLACES=351, PETRI_TRANSITIONS=1660} [2024-12-02 13:05:30,976 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 316 predicate places. [2024-12-02 13:05:30,976 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 1660 transitions, 27523 flow [2024-12-02 13:05:30,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:05:30,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:05:30,977 INFO L206 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] [2024-12-02 13:05:30,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 13:05:31,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 13:05:31,177 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:05:31,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:05:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2114372463, now seen corresponding path program 18 times [2024-12-02 13:05:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:05:31,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832370445] [2024-12-02 13:05:31,178 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:05:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:05:31,187 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:05:31,187 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:05:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:05:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:05:31,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832370445] [2024-12-02 13:05:31,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832370445] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:05:31,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:05:31,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 13:05:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115197168] [2024-12-02 13:05:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:05:31,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:05:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:05:31,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:05:31,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:05:31,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:05:31,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1660 transitions, 27523 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:05:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:05:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:05:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:05:43,100 INFO L124 PetriNetUnfolderBase]: 35437/50354 cut-off events. [2024-12-02 13:05:43,101 INFO L125 PetriNetUnfolderBase]: For 588375/590350 co-relation queries the response was YES. [2024-12-02 13:05:43,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320800 conditions, 50354 events. 35437/50354 cut-off events. For 588375/590350 co-relation queries the response was YES. Maximal size of possible extension queue 1847. Compared 327204 event pairs, 12164 based on Foata normal form. 154/49964 useless extension candidates. Maximal degree in co-relation 320698. Up to 34341 conditions per place. [2024-12-02 13:05:44,015 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 1471 selfloop transitions, 249 changer transitions 6/1882 dead transitions. [2024-12-02 13:05:44,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1882 transitions, 34097 flow [2024-12-02 13:05:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 13:05:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 13:05:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-12-02 13:05:44,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4511784511784512 [2024-12-02 13:05:44,016 INFO L175 Difference]: Start difference. First operand has 351 places, 1660 transitions, 27523 flow. Second operand 9 states and 134 transitions. [2024-12-02 13:05:44,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1882 transitions, 34097 flow [2024-12-02 13:06:02,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1882 transitions, 33857 flow, removed 120 selfloop flow, removed 0 redundant places. [2024-12-02 13:06:02,364 INFO L231 Difference]: Finished difference. Result has 365 places, 1765 transitions, 30087 flow [2024-12-02 13:06:02,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=27337, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=30087, PETRI_PLACES=365, PETRI_TRANSITIONS=1765} [2024-12-02 13:06:02,365 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 330 predicate places. [2024-12-02 13:06:02,365 INFO L471 AbstractCegarLoop]: Abstraction has has 365 places, 1765 transitions, 30087 flow [2024-12-02 13:06:02,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:06:02,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:02,365 INFO L206 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] [2024-12-02 13:06:02,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-12-02 13:06:02,366 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:06:02,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1509777567, now seen corresponding path program 19 times [2024-12-02 13:06:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:02,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389744520] [2024-12-02 13:06:02,366 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:06:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:06:02,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:02,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389744520] [2024-12-02 13:06:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389744520] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:06:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006282203] [2024-12-02 13:06:02,454 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 13:06:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:06:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:06:02,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:06:02,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 13:06:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 13:06:02,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:06:02,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:06:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:06:02,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:06:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:06:02,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006282203] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:06:02,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:06:02,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-12-02 13:06:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115519123] [2024-12-02 13:06:02,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:06:02,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 13:06:02,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:02,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 13:06:02,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-12-02 13:06:02,736 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:06:02,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1765 transitions, 30087 flow. Second operand has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:06:02,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:02,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:06:02,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:15,613 INFO L124 PetriNetUnfolderBase]: 31508/45038 cut-off events. [2024-12-02 13:06:15,613 INFO L125 PetriNetUnfolderBase]: For 546768/546776 co-relation queries the response was YES. [2024-12-02 13:06:16,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294413 conditions, 45038 events. 31508/45038 cut-off events. For 546768/546776 co-relation queries the response was YES. Maximal size of possible extension queue 1830. Compared 299379 event pairs, 2938 based on Foata normal form. 29/45064 useless extension candidates. Maximal degree in co-relation 294304. Up to 20213 conditions per place. [2024-12-02 13:06:16,253 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 1352 selfloop transitions, 1079 changer transitions 0/2444 dead transitions. [2024-12-02 13:06:16,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 2444 transitions, 44282 flow [2024-12-02 13:06:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 13:06:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-12-02 13:06:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 282 transitions. [2024-12-02 13:06:16,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44976076555023925 [2024-12-02 13:06:16,255 INFO L175 Difference]: Start difference. First operand has 365 places, 1765 transitions, 30087 flow. Second operand 19 states and 282 transitions. [2024-12-02 13:06:16,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 2444 transitions, 44282 flow [2024-12-02 13:06:30,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 2444 transitions, 43804 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-12-02 13:06:30,832 INFO L231 Difference]: Finished difference. Result has 383 places, 1873 transitions, 34889 flow [2024-12-02 13:06:30,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=29814, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34889, PETRI_PLACES=383, PETRI_TRANSITIONS=1873} [2024-12-02 13:06:30,833 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 348 predicate places. [2024-12-02 13:06:30,833 INFO L471 AbstractCegarLoop]: Abstraction has has 383 places, 1873 transitions, 34889 flow [2024-12-02 13:06:30,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:06:30,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:06:30,833 INFO L206 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] [2024-12-02 13:06:30,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 13:06:31,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 13:06:31,034 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:06:31,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:06:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -484491013, now seen corresponding path program 20 times [2024-12-02 13:06:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:06:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092348757] [2024-12-02 13:06:31,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 13:06:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:06:31,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:06:31,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:06:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:06:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:06:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092348757] [2024-12-02 13:06:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092348757] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 13:06:31,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 13:06:31,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 13:06:31,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812716984] [2024-12-02 13:06:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:06:31,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:06:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:06:31,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:06:31,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-12-02 13:06:31,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:06:31,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1873 transitions, 34889 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:06:31,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:06:31,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:06:31,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:06:46,511 INFO L124 PetriNetUnfolderBase]: 37977/53890 cut-off events. [2024-12-02 13:06:46,511 INFO L125 PetriNetUnfolderBase]: For 776552/778541 co-relation queries the response was YES. [2024-12-02 13:06:47,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368320 conditions, 53890 events. 37977/53890 cut-off events. For 776552/778541 co-relation queries the response was YES. Maximal size of possible extension queue 1962. Compared 351883 event pairs, 13222 based on Foata normal form. 118/53454 useless extension candidates. Maximal degree in co-relation 368208. Up to 36515 conditions per place. [2024-12-02 13:06:47,254 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 1583 selfloop transitions, 266 changer transitions 6/2037 dead transitions. [2024-12-02 13:06:47,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 2037 transitions, 40795 flow [2024-12-02 13:06:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 13:06:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 13:06:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-12-02 13:06:47,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-12-02 13:06:47,255 INFO L175 Difference]: Start difference. First operand has 383 places, 1873 transitions, 34889 flow. Second operand 10 states and 147 transitions. [2024-12-02 13:06:47,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 2037 transitions, 40795 flow [2024-12-02 13:07:11,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2037 transitions, 40027 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-12-02 13:07:11,985 INFO L231 Difference]: Finished difference. Result has 389 places, 1914 transitions, 35555 flow [2024-12-02 13:07:11,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=34179, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=35555, PETRI_PLACES=389, PETRI_TRANSITIONS=1914} [2024-12-02 13:07:11,987 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 354 predicate places. [2024-12-02 13:07:11,987 INFO L471 AbstractCegarLoop]: Abstraction has has 389 places, 1914 transitions, 35555 flow [2024-12-02 13:07:11,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:07:11,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:07:11,988 INFO L206 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] [2024-12-02 13:07:11,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 13:07:11,988 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:07:11,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:07:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 885605431, now seen corresponding path program 21 times [2024-12-02 13:07:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:07:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730259373] [2024-12-02 13:07:11,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:07:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:07:12,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:07:12,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:07:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:07:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:07:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730259373] [2024-12-02 13:07:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730259373] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:07:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334825515] [2024-12-02 13:07:12,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 13:07:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:07:12,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:07:12,083 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:07:12,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 13:07:12,152 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 13:07:12,152 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:07:12,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:07:12,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:07:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:07:12,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:07:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 13:07:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334825515] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:07:12,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:07:12,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-12-02 13:07:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825201682] [2024-12-02 13:07:12,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:07:12,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 13:07:12,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:07:12,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 13:07:12,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-12-02 13:07:12,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:07:12,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1914 transitions, 35555 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:07:12,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:07:12,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:07:12,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:07:28,205 INFO L124 PetriNetUnfolderBase]: 36039/51502 cut-off events. [2024-12-02 13:07:28,206 INFO L125 PetriNetUnfolderBase]: For 721294/721294 co-relation queries the response was YES. [2024-12-02 13:07:28,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350626 conditions, 51502 events. 36039/51502 cut-off events. For 721294/721294 co-relation queries the response was YES. Maximal size of possible extension queue 1934. Compared 343825 event pairs, 3069 based on Foata normal form. 21/51520 useless extension candidates. Maximal degree in co-relation 350512. Up to 23972 conditions per place. [2024-12-02 13:07:28,907 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 1121 selfloop transitions, 1323 changer transitions 0/2457 dead transitions. [2024-12-02 13:07:28,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 2457 transitions, 48669 flow [2024-12-02 13:07:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 13:07:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 13:07:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 220 transitions. [2024-12-02 13:07:28,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-12-02 13:07:28,908 INFO L175 Difference]: Start difference. First operand has 389 places, 1914 transitions, 35555 flow. Second operand 16 states and 220 transitions. [2024-12-02 13:07:28,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 2457 transitions, 48669 flow [2024-12-02 13:07:49,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 2457 transitions, 48262 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-12-02 13:07:49,987 INFO L231 Difference]: Finished difference. Result has 402 places, 2122 transitions, 41936 flow [2024-12-02 13:07:49,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=35279, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41936, PETRI_PLACES=402, PETRI_TRANSITIONS=2122} [2024-12-02 13:07:49,988 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 367 predicate places. [2024-12-02 13:07:49,988 INFO L471 AbstractCegarLoop]: Abstraction has has 402 places, 2122 transitions, 41936 flow [2024-12-02 13:07:49,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:07:49,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:07:49,988 INFO L206 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] [2024-12-02 13:07:49,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-12-02 13:07:50,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 13:07:50,189 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:07:50,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:07:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1750910003, now seen corresponding path program 22 times [2024-12-02 13:07:50,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:07:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868821848] [2024-12-02 13:07:50,190 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:07:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:07:50,196 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:07:50,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:07:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:07:50,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:07:50,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868821848] [2024-12-02 13:07:50,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868821848] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:07:50,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073923201] [2024-12-02 13:07:50,246 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 13:07:50,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:07:50,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:07:50,248 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:07:50,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 13:07:50,306 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 13:07:50,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:07:50,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:07:50,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:07:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:07:50,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:07:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:07:50,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073923201] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:07:50,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:07:50,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-12-02 13:07:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627325408] [2024-12-02 13:07:50,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:07:50,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 13:07:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:07:50,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 13:07:50,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-12-02 13:07:50,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-12-02 13:07:50,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 2122 transitions, 41936 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:07:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:07:50,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-12-02 13:07:50,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:08:14,497 INFO L124 PetriNetUnfolderBase]: 52301/73266 cut-off events. [2024-12-02 13:08:14,497 INFO L125 PetriNetUnfolderBase]: For 1125775/1125775 co-relation queries the response was YES. [2024-12-02 13:08:15,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511872 conditions, 73266 events. 52301/73266 cut-off events. For 1125775/1125775 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 470788 event pairs, 2047 based on Foata normal form. 14/73280 useless extension candidates. Maximal degree in co-relation 511757. Up to 31417 conditions per place. [2024-12-02 13:08:15,650 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 1189 selfloop transitions, 1846 changer transitions 0/3036 dead transitions. [2024-12-02 13:08:15,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 3036 transitions, 61170 flow [2024-12-02 13:08:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-12-02 13:08:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-12-02 13:08:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 590 transitions. [2024-12-02 13:08:15,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40633608815426997 [2024-12-02 13:08:15,651 INFO L175 Difference]: Start difference. First operand has 402 places, 2122 transitions, 41936 flow. Second operand 44 states and 590 transitions. [2024-12-02 13:08:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 3036 transitions, 61170 flow [2024-12-02 13:09:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 3036 transitions, 58969 flow, removed 151 selfloop flow, removed 9 redundant places. [2024-12-02 13:09:05,769 INFO L231 Difference]: Finished difference. Result has 450 places, 2452 transitions, 51988 flow [2024-12-02 13:09:05,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=40218, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=51988, PETRI_PLACES=450, PETRI_TRANSITIONS=2452} [2024-12-02 13:09:05,771 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 415 predicate places. [2024-12-02 13:09:05,771 INFO L471 AbstractCegarLoop]: Abstraction has has 450 places, 2452 transitions, 51988 flow [2024-12-02 13:09:05,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:09:05,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:09:05,772 INFO L206 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] [2024-12-02 13:09:05,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-12-02 13:09:05,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 13:09:05,972 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:09:05,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:09:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1384888673, now seen corresponding path program 23 times [2024-12-02 13:09:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:09:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457833687] [2024-12-02 13:09:05,973 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:09:05,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:09:05,981 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:09:05,982 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:09:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:09:06,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:09:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457833687] [2024-12-02 13:09:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457833687] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:09:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891978338] [2024-12-02 13:09:06,047 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 13:09:06,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:09:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:09:06,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:09:06,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 13:09:06,116 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 13:09:06,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:09:06,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 13:09:06,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:09:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:09:06,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:09:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:09:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891978338] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 13:09:06,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 13:09:06,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2024-12-02 13:09:06,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553441380] [2024-12-02 13:09:06,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 13:09:06,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 13:09:06,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:09:06,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 13:09:06,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-12-02 13:09:06,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-12-02 13:09:06,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 2452 transitions, 51988 flow. Second operand has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:09:06,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:09:06,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-12-02 13:09:06,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 13:10:06,045 INFO L124 PetriNetUnfolderBase]: 107936/150285 cut-off events. [2024-12-02 13:10:06,045 INFO L125 PetriNetUnfolderBase]: For 2532415/2532415 co-relation queries the response was YES. [2024-12-02 13:10:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084264 conditions, 150285 events. 107936/150285 cut-off events. For 2532415/2532415 co-relation queries the response was YES. Maximal size of possible extension queue 4014. Compared 1030474 event pairs, 8496 based on Foata normal form. 72/150357 useless extension candidates. Maximal degree in co-relation 1084137. Up to 65828 conditions per place. [2024-12-02 13:10:08,752 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 2532 selfloop transitions, 4458 changer transitions 0/6991 dead transitions. [2024-12-02 13:10:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 6991 transitions, 146107 flow [2024-12-02 13:10:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-12-02 13:10:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-12-02 13:10:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1156 transitions. [2024-12-02 13:10:08,755 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2024-12-02 13:10:08,755 INFO L175 Difference]: Start difference. First operand has 450 places, 2452 transitions, 51988 flow. Second operand 85 states and 1156 transitions. [2024-12-02 13:10:08,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 6991 transitions, 146107 flow [2024-12-02 13:14:33,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 6991 transitions, 143398 flow, removed 329 selfloop flow, removed 7 redundant places. [2024-12-02 13:14:33,580 INFO L231 Difference]: Finished difference. Result has 568 places, 5493 transitions, 126679 flow [2024-12-02 13:14:33,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=50845, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1758, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=126679, PETRI_PLACES=568, PETRI_TRANSITIONS=5493} [2024-12-02 13:14:33,583 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 533 predicate places. [2024-12-02 13:14:33,583 INFO L471 AbstractCegarLoop]: Abstraction has has 568 places, 5493 transitions, 126679 flow [2024-12-02 13:14:33,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:33,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 13:14:33,583 INFO L206 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] [2024-12-02 13:14:33,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 13:14:33,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 13:14:33,784 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-12-02 13:14:33,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 13:14:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash -10293479, now seen corresponding path program 24 times [2024-12-02 13:14:33,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 13:14:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428592142] [2024-12-02 13:14:33,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:14:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 13:14:33,863 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:14:33,864 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 13:14:34,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 13:14:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428592142] [2024-12-02 13:14:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428592142] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492494584] [2024-12-02 13:14:34,136 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 13:14:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 13:14:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 13:14:34,138 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 13:14:34,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3db78b20-be13-430c-9d88-e03dc9484cf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 13:14:34,235 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 13:14:34,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 13:14:34,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 13:14:34,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 13:14:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:34,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 13:14:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 13:14:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492494584] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 13:14:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 13:14:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2024-12-02 13:14:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711101982] [2024-12-02 13:14:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 13:14:34,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 13:14:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 13:14:34,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 13:14:34,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-12-02 13:14:34,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-12-02 13:14:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 5493 transitions, 126679 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 13:14:34,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 13:14:34,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-12-02 13:14:34,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand