./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum.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_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB --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 e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:14:03,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:14:03,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:14:03,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:14:03,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:14:03,231 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:14:03,232 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:14:03,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:14:03,232 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:14:03,233 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:14:03,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:14:03,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:14:03,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:14:03,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:14:03,235 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:14:03,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:14:03,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:14:03,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:14:03,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:14:03,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:14:03,238 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:14:03,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:14:03,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:14:03,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:14:03,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:14:03,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:14:03,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:14:03,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:14:03,240 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:14:03,240 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:14:03,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:14:03,242 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_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB 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 -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-28 03:14:03,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:14:03,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:14:03,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:14:03,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:14:03,633 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:14:03,635 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-28 03:14:06,873 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/data/a86331d7c/e68fd195eb644c8f82a984ddcd6f56b0/FLAG45f738e87 [2024-11-28 03:14:07,143 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:14:07,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-28 03:14:07,152 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/data/a86331d7c/e68fd195eb644c8f82a984ddcd6f56b0/FLAG45f738e87 [2024-11-28 03:14:07,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/data/a86331d7c/e68fd195eb644c8f82a984ddcd6f56b0 [2024-11-28 03:14:07,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:14:07,173 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:14:07,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:14:07,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:14:07,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:14:07,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d8f2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07, skipping insertion in model container [2024-11-28 03:14:07,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,201 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:14:07,444 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_8f49ace5-0f3f-4403-9434-837270348a6c/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2423,2436] [2024-11-28 03:14:07,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:14:07,482 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:14:07,523 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_8f49ace5-0f3f-4403-9434-837270348a6c/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2423,2436] [2024-11-28 03:14:07,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:14:07,557 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:14:07,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07 WrapperNode [2024-11-28 03:14:07,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:14:07,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:14:07,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:14:07,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:14:07,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,585 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,634 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 259 [2024-11-28 03:14:07,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:14:07,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:14:07,635 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:14:07,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:14:07,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,656 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,693 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 03:14:07,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,710 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,718 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:14:07,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:14:07,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:14:07,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:14:07,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2024-11-28 03:14:07,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:14:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:07,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:14:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:14:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:14:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:14:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:14:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:14:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:14:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:14:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:14:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:14:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:14:07,805 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:14:07,948 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:14:07,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:14:08,601 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:14:08,601 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:14:09,197 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:14:09,200 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 03:14:09,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:09 BoogieIcfgContainer [2024-11-28 03:14:09,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:14:09,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:14:09,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:14:09,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:14:09,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:14:07" (1/3) ... [2024-11-28 03:14:09,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517c7588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:09, skipping insertion in model container [2024-11-28 03:14:09,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (2/3) ... [2024-11-28 03:14:09,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517c7588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:09, skipping insertion in model container [2024-11-28 03:14:09,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:09" (3/3) ... [2024-11-28 03:14:09,216 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-28 03:14:09,234 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:14:09,236 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum.wvr.c that has 4 procedures, 29 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 03:14:09,237 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:14:09,382 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:14:09,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 33 transitions, 87 flow [2024-11-28 03:14:09,469 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2024-11-28 03:14:09,471 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:14:09,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 5/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-28 03:14:09,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 33 transitions, 87 flow [2024-11-28 03:14:09,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 29 transitions, 76 flow [2024-11-28 03:14:09,495 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:14:09,520 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;@563afffd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:14:09,520 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 03:14:09,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:14:09,540 INFO L124 PetriNetUnfolderBase]: 5/28 cut-off events. [2024-11-28 03:14:09,540 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:14:09,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:14:09,541 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] [2024-11-28 03:14:09,542 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)] === [2024-11-28 03:14:09,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash -812246027, now seen corresponding path program 1 times [2024-11-28 03:14:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:14:09,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882065101] [2024-11-28 03:14:09,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:14:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:14:10,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882065101] [2024-11-28 03:14:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882065101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:10,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:10,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:14:10,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191741609] [2024-11-28 03:14:10,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:10,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:14:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:14:10,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:14:10,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:14:10,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:14:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:10,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:14:10,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:14:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:14:10,529 INFO L124 PetriNetUnfolderBase]: 818/1181 cut-off events. [2024-11-28 03:14:10,529 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-28 03:14:10,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1181 events. 818/1181 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4448 event pairs, 226 based on Foata normal form. 1/936 useless extension candidates. Maximal degree in co-relation 2122. Up to 803 conditions per place. [2024-11-28 03:14:10,550 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 42 selfloop transitions, 4 changer transitions 1/48 dead transitions. [2024-11-28 03:14:10,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 223 flow [2024-11-28 03:14:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:14:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:14:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-28 03:14:10,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-28 03:14:10,568 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-11-28 03:14:10,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 223 flow [2024-11-28 03:14:10,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 48 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:14:10,579 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 90 flow [2024-11-28 03:14:10,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=31, PETRI_TRANSITIONS=32} [2024-11-28 03:14:10,585 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-28 03:14:10,586 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 90 flow [2024-11-28 03:14:10,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:10,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:14:10,586 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] [2024-11-28 03:14:10,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:14:10,587 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)] === [2024-11-28 03:14:10,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 687895905, now seen corresponding path program 1 times [2024-11-28 03:14:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:14:10,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541785530] [2024-11-28 03:14:10,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:14:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:14:11,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:11,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541785530] [2024-11-28 03:14:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541785530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:11,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:11,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:14:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780442559] [2024-11-28 03:14:11,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:11,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:14:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:14:11,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:14:11,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:14:11,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:14:11,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:11,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:14:11,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:14:11,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:14:11,449 INFO L124 PetriNetUnfolderBase]: 714/1072 cut-off events. [2024-11-28 03:14:11,450 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-11-28 03:14:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1072 events. 714/1072 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4047 event pairs, 478 based on Foata normal form. 1/932 useless extension candidates. Maximal degree in co-relation 776. Up to 991 conditions per place. [2024-11-28 03:14:11,465 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 4 changer transitions 1/35 dead transitions. [2024-11-28 03:14:11,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 156 flow [2024-11-28 03:14:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:14:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:14:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-28 03:14:11,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-28 03:14:11,467 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 90 flow. Second operand 4 states and 56 transitions. [2024-11-28 03:14:11,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 156 flow [2024-11-28 03:14:11,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:14:11,471 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 112 flow [2024-11-28 03:14:11,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-28 03:14:11,472 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-11-28 03:14:11,472 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 112 flow [2024-11-28 03:14:11,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:11,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:14:11,473 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] [2024-11-28 03:14:11,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:14:11,474 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)] === [2024-11-28 03:14:11,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash 325365724, now seen corresponding path program 1 times [2024-11-28 03:14:11,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:14:11,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030131580] [2024-11-28 03:14:11,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:14:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:14:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:11,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030131580] [2024-11-28 03:14:11,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030131580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:14:11,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:14:11,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:14:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424967499] [2024-11-28 03:14:11,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:11,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:14:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:14:11,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:14:11,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:14:11,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:14:11,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:11,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:14:11,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:14:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:14:12,054 INFO L124 PetriNetUnfolderBase]: 719/1084 cut-off events. [2024-11-28 03:14:12,054 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-28 03:14:12,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2327 conditions, 1084 events. 719/1084 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4061 event pairs, 254 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 2303. Up to 528 conditions per place. [2024-11-28 03:14:12,071 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-28 03:14:12,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 224 flow [2024-11-28 03:14:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:14:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:14:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-28 03:14:12,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-11-28 03:14:12,073 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 112 flow. Second operand 4 states and 62 transitions. [2024-11-28 03:14:12,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 224 flow [2024-11-28 03:14:12,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 214 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:14:12,076 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 123 flow [2024-11-28 03:14:12,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-28 03:14:12,080 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-11-28 03:14:12,080 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 123 flow [2024-11-28 03:14:12,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:12,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:14:12,080 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] [2024-11-28 03:14:12,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:14:12,081 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)] === [2024-11-28 03:14:12,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 362426954, now seen corresponding path program 1 times [2024-11-28 03:14:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:14:12,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356078065] [2024-11-28 03:14:12,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:14:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:14:12,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356078065] [2024-11-28 03:14:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356078065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:14:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082578126] [2024-11-28 03:14:12,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:12,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:12,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:14:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:12,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:14:12,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:14:12,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:14:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:14:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082578126] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:14:12,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:14:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 03:14:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080697123] [2024-11-28 03:14:12,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:14:12,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:14:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:14:12,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:14:12,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:14:12,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:14:12,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:12,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:14:12,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:14:12,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:14:13,037 INFO L124 PetriNetUnfolderBase]: 760/1123 cut-off events. [2024-11-28 03:14:13,037 INFO L125 PetriNetUnfolderBase]: For 477/490 co-relation queries the response was YES. [2024-11-28 03:14:13,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2860 conditions, 1123 events. 760/1123 cut-off events. For 477/490 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4262 event pairs, 324 based on Foata normal form. 94/1124 useless extension candidates. Maximal degree in co-relation 2830. Up to 805 conditions per place. [2024-11-28 03:14:13,046 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-11-28 03:14:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 263 flow [2024-11-28 03:14:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:14:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:14:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-28 03:14:13,048 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-28 03:14:13,048 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 123 flow. Second operand 5 states and 72 transitions. [2024-11-28 03:14:13,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 263 flow [2024-11-28 03:14:13,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:14:13,052 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 140 flow [2024-11-28 03:14:13,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-28 03:14:13,053 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2024-11-28 03:14:13,053 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 140 flow [2024-11-28 03:14:13,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:14:13,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:14:13,054 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] [2024-11-28 03:14:13,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:14:13,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:13,255 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)] === [2024-11-28 03:14:13,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:14:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1939215452, now seen corresponding path program 1 times [2024-11-28 03:14:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:14:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863219161] [2024-11-28 03:14:13,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:14:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:14:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863219161] [2024-11-28 03:14:14,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863219161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:14:14,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781957723] [2024-11-28 03:14:14,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:14:14,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:14,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:14,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:14,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:14:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:14:15,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:14:15,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:15,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-28 03:14:15,275 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 [2024-11-28 03:14:15,368 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:14:15,368 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 11 treesize of output 11 [2024-11-28 03:14:15,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-28 03:14:15,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 03:14:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:14:15,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:14:33,151 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-28 03:14:33,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1578 treesize of output 1148 [2024-11-28 03:14:33,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:14:33,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 809 treesize of output 749 [2024-11-28 03:14:41,763 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:14:46,701 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:14:59,994 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:15:00,539 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:15:01,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:01,256 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 85 treesize of output 89 [2024-11-28 03:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781957723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:05,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2024-11-28 03:15:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000232251] [2024-11-28 03:15:05,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:05,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:15:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:05,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:15:05,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=645, Unknown=4, NotChecked=0, Total=756 [2024-11-28 03:15:05,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:15:05,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 140 flow. Second operand has 28 states, 28 states have (on average 6.178571428571429) internal successors, (173), 28 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:05,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:15:05,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:15:05,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:15:08,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:15:23,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:15:27,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:15:29,571 INFO L124 PetriNetUnfolderBase]: 1967/2830 cut-off events. [2024-11-28 03:15:29,571 INFO L125 PetriNetUnfolderBase]: For 1983/1983 co-relation queries the response was YES. [2024-11-28 03:15:29,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8045 conditions, 2830 events. 1967/2830 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11657 event pairs, 233 based on Foata normal form. 2/2641 useless extension candidates. Maximal degree in co-relation 5941. Up to 1465 conditions per place. [2024-11-28 03:15:29,593 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 136 selfloop transitions, 47 changer transitions 2/186 dead transitions. [2024-11-28 03:15:29,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 186 transitions, 1009 flow [2024-11-28 03:15:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:15:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:15:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 253 transitions. [2024-11-28 03:15:29,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-28 03:15:29,600 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 140 flow. Second operand 18 states and 253 transitions. [2024-11-28 03:15:29,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 186 transitions, 1009 flow [2024-11-28 03:15:29,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 186 transitions, 989 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-28 03:15:29,618 INFO L231 Difference]: Finished difference. Result has 62 places, 77 transitions, 470 flow [2024-11-28 03:15:29,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=470, PETRI_PLACES=62, PETRI_TRANSITIONS=77} [2024-11-28 03:15:29,620 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2024-11-28 03:15:29,620 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 77 transitions, 470 flow [2024-11-28 03:15:29,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.178571428571429) internal successors, (173), 28 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:29,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:15:29,623 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] [2024-11-28 03:15:29,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:29,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:29,824 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)] === [2024-11-28 03:15:29,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1112852320, now seen corresponding path program 2 times [2024-11-28 03:15:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375264723] [2024-11-28 03:15:29,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:29,896 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:29,896 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375264723] [2024-11-28 03:15:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375264723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317208864] [2024-11-28 03:15:31,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:31,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:31,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:31,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:15:31,350 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:31,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:31,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:15:31,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:31,649 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 [2024-11-28 03:15:32,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:32,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:15:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:32,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:32,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:32,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 03:15:33,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:33,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 369 treesize of output 297 [2024-11-28 03:15:34,261 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:15:35,242 INFO L349 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2024-11-28 03:15:35,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 91 [2024-11-28 03:15:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317208864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:35,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:35,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-11-28 03:15:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711700320] [2024-11-28 03:15:35,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:35,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:15:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:35,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:15:35,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:15:35,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:15:35,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 77 transitions, 470 flow. Second operand has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:35,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:15:35,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:15:35,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:15:40,378 INFO L124 PetriNetUnfolderBase]: 2391/3453 cut-off events. [2024-11-28 03:15:40,378 INFO L125 PetriNetUnfolderBase]: For 3935/3935 co-relation queries the response was YES. [2024-11-28 03:15:40,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11339 conditions, 3453 events. 2391/3453 cut-off events. For 3935/3935 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14847 event pairs, 493 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 10428. Up to 2438 conditions per place. [2024-11-28 03:15:40,408 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 141 selfloop transitions, 88 changer transitions 1/231 dead transitions. [2024-11-28 03:15:40,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 231 transitions, 1612 flow [2024-11-28 03:15:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:15:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:15:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 292 transitions. [2024-11-28 03:15:40,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3277216610549944 [2024-11-28 03:15:40,412 INFO L175 Difference]: Start difference. First operand has 62 places, 77 transitions, 470 flow. Second operand 27 states and 292 transitions. [2024-11-28 03:15:40,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 231 transitions, 1612 flow [2024-11-28 03:15:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 231 transitions, 1554 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-28 03:15:40,430 INFO L231 Difference]: Finished difference. Result has 105 places, 143 transitions, 1167 flow [2024-11-28 03:15:40,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1167, PETRI_PLACES=105, PETRI_TRANSITIONS=143} [2024-11-28 03:15:40,434 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 71 predicate places. [2024-11-28 03:15:40,434 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 143 transitions, 1167 flow [2024-11-28 03:15:40,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:40,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:15:40,435 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] [2024-11-28 03:15:40,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:40,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 03:15:40,636 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)] === [2024-11-28 03:15:40,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1640071582, now seen corresponding path program 3 times [2024-11-28 03:15:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978613599] [2024-11-28 03:15:40,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:15:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:40,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:15:40,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978613599] [2024-11-28 03:15:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978613599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054207376] [2024-11-28 03:15:42,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:15:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:42,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:42,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:15:42,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:15:42,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:42,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:15:42,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:42,530 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 [2024-11-28 03:15:43,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:43,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:15:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:43,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:43,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:43,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 03:15:44,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:44,567 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 172 treesize of output 144 [2024-11-28 03:15:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:44,860 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 227 [2024-11-28 03:15:44,871 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-28 03:15:44,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:44,922 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 03:15:44,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 1 [2024-11-28 03:15:44,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:44,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 104 [2024-11-28 03:15:44,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:45,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 68 [2024-11-28 03:15:45,177 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:15:45,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 169 [2024-11-28 03:15:45,189 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:15:45,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 126 [2024-11-28 03:15:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,260 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2024-11-28 03:15:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,273 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2024-11-28 03:15:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,324 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 178 [2024-11-28 03:15:45,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,338 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 110 [2024-11-28 03:15:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 178 [2024-11-28 03:15:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 110 [2024-11-28 03:15:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,563 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2024-11-28 03:15:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,653 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 03:15:45,653 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 1 [2024-11-28 03:15:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,695 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 369 treesize of output 295 [2024-11-28 03:15:45,712 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-28 03:15:45,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 246 [2024-11-28 03:15:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:45,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 170 [2024-11-28 03:15:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054207376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:46,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:46,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2024-11-28 03:15:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354262819] [2024-11-28 03:15:46,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:46,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:15:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:46,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:15:46,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:15:46,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:15:46,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 143 transitions, 1167 flow. Second operand has 27 states, 27 states have (on average 6.074074074074074) internal successors, (164), 27 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:46,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:15:46,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:15:46,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:15:52,470 INFO L124 PetriNetUnfolderBase]: 3014/4344 cut-off events. [2024-11-28 03:15:52,471 INFO L125 PetriNetUnfolderBase]: For 18772/18772 co-relation queries the response was YES. [2024-11-28 03:15:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20210 conditions, 4344 events. 3014/4344 cut-off events. For 18772/18772 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19898 event pairs, 674 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 19125. Up to 3246 conditions per place. [2024-11-28 03:15:52,527 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 176 selfloop transitions, 139 changer transitions 1/317 dead transitions. [2024-11-28 03:15:52,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 317 transitions, 3063 flow [2024-11-28 03:15:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 03:15:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 03:15:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 283 transitions. [2024-11-28 03:15:52,530 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.343030303030303 [2024-11-28 03:15:52,530 INFO L175 Difference]: Start difference. First operand has 105 places, 143 transitions, 1167 flow. Second operand 25 states and 283 transitions. [2024-11-28 03:15:52,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 317 transitions, 3063 flow [2024-11-28 03:15:52,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 317 transitions, 2866 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-11-28 03:15:52,611 INFO L231 Difference]: Finished difference. Result has 137 places, 224 transitions, 2216 flow [2024-11-28 03:15:52,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2216, PETRI_PLACES=137, PETRI_TRANSITIONS=224} [2024-11-28 03:15:52,612 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 103 predicate places. [2024-11-28 03:15:52,613 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 224 transitions, 2216 flow [2024-11-28 03:15:52,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.074074074074074) internal successors, (164), 27 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:52,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:15:52,613 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] [2024-11-28 03:15:52,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:15:52,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:52,814 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)] === [2024-11-28 03:15:52,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1321920794, now seen corresponding path program 4 times [2024-11-28 03:15:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145188104] [2024-11-28 03:15:52,815 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:52,859 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:52,860 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:54,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:54,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145188104] [2024-11-28 03:15:54,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145188104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515404247] [2024-11-28 03:15:54,323 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:54,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:54,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:54,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:15:54,469 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:54,469 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:54,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:15:54,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:54,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-28 03:15:54,623 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 [2024-11-28 03:15:54,807 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:54,807 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 11 treesize of output 11 [2024-11-28 03:15:54,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-28 03:15:55,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 03:15:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:55,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515404247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:00,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:00,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2024-11-28 03:16:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558108319] [2024-11-28 03:16:00,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:00,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:16:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:00,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:16:00,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=601, Unknown=1, NotChecked=0, Total=702 [2024-11-28 03:16:00,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:16:00,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 224 transitions, 2216 flow. Second operand has 27 states, 27 states have (on average 6.185185185185185) internal successors, (167), 27 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:00,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:00,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:16:00,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:05,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:09,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:14,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:19,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:23,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:27,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:32,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:36,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:40,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:44,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:48,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:52,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:16:56,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:00,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:05,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:09,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:13,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:17,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:21,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:25,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:17:27,710 INFO L124 PetriNetUnfolderBase]: 3659/5282 cut-off events. [2024-11-28 03:17:27,710 INFO L125 PetriNetUnfolderBase]: For 26808/26808 co-relation queries the response was YES. [2024-11-28 03:17:27,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26810 conditions, 5282 events. 3659/5282 cut-off events. For 26808/26808 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25003 event pairs, 737 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 26512. Up to 3984 conditions per place. [2024-11-28 03:17:27,840 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 186 selfloop transitions, 231 changer transitions 1/419 dead transitions. [2024-11-28 03:17:27,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 419 transitions, 4855 flow [2024-11-28 03:17:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:17:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:17:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 268 transitions. [2024-11-28 03:17:27,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-28 03:17:27,844 INFO L175 Difference]: Start difference. First operand has 137 places, 224 transitions, 2216 flow. Second operand 24 states and 268 transitions. [2024-11-28 03:17:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 419 transitions, 4855 flow [2024-11-28 03:17:27,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 419 transitions, 4742 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-11-28 03:17:27,996 INFO L231 Difference]: Finished difference. Result has 164 places, 331 transitions, 4030 flow [2024-11-28 03:17:27,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4030, PETRI_PLACES=164, PETRI_TRANSITIONS=331} [2024-11-28 03:17:27,997 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 130 predicate places. [2024-11-28 03:17:27,998 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 331 transitions, 4030 flow [2024-11-28 03:17:27,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.185185185185185) internal successors, (167), 27 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:27,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:27,998 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] [2024-11-28 03:17:28,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:17:28,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:28,203 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)] === [2024-11-28 03:17:28,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2081560174, now seen corresponding path program 5 times [2024-11-28 03:17:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:28,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092902024] [2024-11-28 03:17:28,204 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:17:28,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:28,240 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:28,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092902024] [2024-11-28 03:17:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092902024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056586827] [2024-11-28 03:17:30,833 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:17:30,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:30,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:30,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:17:30,967 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:30,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:30,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:17:30,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:31,334 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 [2024-11-28 03:17:32,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:32,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:17:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:32,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:33,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:33,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 03:17:34,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:34,530 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 214 treesize of output 190 [2024-11-28 03:17:34,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:34,556 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 182 treesize of output 134 [2024-11-28 03:17:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056586827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:35,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-11-28 03:17:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94939840] [2024-11-28 03:17:35,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:35,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:17:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:35,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:17:35,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:17:35,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:17:35,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 331 transitions, 4030 flow. Second operand has 33 states, 33 states have (on average 5.909090909090909) internal successors, (195), 33 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:35,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:35,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:17:35,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:42,669 INFO L124 PetriNetUnfolderBase]: 4021/5796 cut-off events. [2024-11-28 03:17:42,669 INFO L125 PetriNetUnfolderBase]: For 35099/35099 co-relation queries the response was YES. [2024-11-28 03:17:42,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31026 conditions, 5796 events. 4021/5796 cut-off events. For 35099/35099 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27905 event pairs, 1024 based on Foata normal form. 1/5797 useless extension candidates. Maximal degree in co-relation 30563. Up to 4570 conditions per place. [2024-11-28 03:17:42,742 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 233 selfloop transitions, 245 changer transitions 1/480 dead transitions. [2024-11-28 03:17:42,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 480 transitions, 6295 flow [2024-11-28 03:17:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:17:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:17:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 304 transitions. [2024-11-28 03:17:42,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.329004329004329 [2024-11-28 03:17:42,746 INFO L175 Difference]: Start difference. First operand has 164 places, 331 transitions, 4030 flow. Second operand 28 states and 304 transitions. [2024-11-28 03:17:42,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 480 transitions, 6295 flow [2024-11-28 03:17:42,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 480 transitions, 6136 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-11-28 03:17:42,964 INFO L231 Difference]: Finished difference. Result has 197 places, 389 transitions, 5455 flow [2024-11-28 03:17:42,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5455, PETRI_PLACES=197, PETRI_TRANSITIONS=389} [2024-11-28 03:17:42,966 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 163 predicate places. [2024-11-28 03:17:42,966 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 389 transitions, 5455 flow [2024-11-28 03:17:42,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.909090909090909) internal successors, (195), 33 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:42,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:42,967 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] [2024-11-28 03:17:42,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:43,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:43,168 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)] === [2024-11-28 03:17:43,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1388810278, now seen corresponding path program 6 times [2024-11-28 03:17:43,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:43,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440193383] [2024-11-28 03:17:43,169 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:17:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:43,233 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:17:43,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:44,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440193383] [2024-11-28 03:17:44,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440193383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:44,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058091970] [2024-11-28 03:17:44,664 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:17:44,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:44,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:44,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:17:44,818 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:17:44,818 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:44,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:17:44,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:45,187 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 [2024-11-28 03:17:45,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:45,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:17:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:45,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:46,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:46,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2024-11-28 03:17:47,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:47,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 235 [2024-11-28 03:17:48,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 120 [2024-11-28 03:17:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058091970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:49,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:49,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-11-28 03:17:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528554641] [2024-11-28 03:17:49,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:49,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:17:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:49,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:17:49,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:17:49,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:17:49,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 389 transitions, 5455 flow. Second operand has 25 states, 25 states have (on average 6.16) internal successors, (154), 25 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:49,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:49,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:17:49,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:54,347 INFO L124 PetriNetUnfolderBase]: 4621/6661 cut-off events. [2024-11-28 03:17:54,347 INFO L125 PetriNetUnfolderBase]: For 46135/46135 co-relation queries the response was YES. [2024-11-28 03:17:54,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37087 conditions, 6661 events. 4621/6661 cut-off events. For 46135/46135 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33198 event pairs, 944 based on Foata normal form. 1/6662 useless extension candidates. Maximal degree in co-relation 36420. Up to 5133 conditions per place. [2024-11-28 03:17:54,428 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 225 selfloop transitions, 283 changer transitions 1/510 dead transitions. [2024-11-28 03:17:54,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 510 transitions, 7454 flow [2024-11-28 03:17:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:17:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:17:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 281 transitions. [2024-11-28 03:17:54,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3547979797979798 [2024-11-28 03:17:54,431 INFO L175 Difference]: Start difference. First operand has 197 places, 389 transitions, 5455 flow. Second operand 24 states and 281 transitions. [2024-11-28 03:17:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 510 transitions, 7454 flow [2024-11-28 03:17:54,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 510 transitions, 7084 flow, removed 101 selfloop flow, removed 11 redundant places. [2024-11-28 03:17:54,709 INFO L231 Difference]: Finished difference. Result has 214 places, 424 transitions, 6278 flow [2024-11-28 03:17:54,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6278, PETRI_PLACES=214, PETRI_TRANSITIONS=424} [2024-11-28 03:17:54,711 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 180 predicate places. [2024-11-28 03:17:54,712 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 424 transitions, 6278 flow [2024-11-28 03:17:54,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.16) internal successors, (154), 25 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:54,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:54,712 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] [2024-11-28 03:17:54,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:17:54,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:17:54,913 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)] === [2024-11-28 03:17:54,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1545207780, now seen corresponding path program 7 times [2024-11-28 03:17:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:54,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736973158] [2024-11-28 03:17:54,915 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:17:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736973158] [2024-11-28 03:17:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736973158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:56,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075641418] [2024-11-28 03:17:56,937 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:17:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:56,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:56,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:17:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:57,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:17:57,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:57,482 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 [2024-11-28 03:17:58,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:58,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 03:17:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:58,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:59,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:59,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 240 [2024-11-28 03:18:00,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:00,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 174 [2024-11-28 03:18:00,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:00,129 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 166 treesize of output 134 [2024-11-28 03:18:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:00,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075641418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:00,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:00,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-28 03:18:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475713026] [2024-11-28 03:18:00,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:00,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:18:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:00,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:18:00,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:18:00,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:18:00,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 424 transitions, 6278 flow. Second operand has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:00,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:00,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:18:00,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:06,611 INFO L124 PetriNetUnfolderBase]: 5458/7844 cut-off events. [2024-11-28 03:18:06,611 INFO L125 PetriNetUnfolderBase]: For 63173/63173 co-relation queries the response was YES. [2024-11-28 03:18:06,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45139 conditions, 7844 events. 5458/7844 cut-off events. For 63173/63173 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40080 event pairs, 1272 based on Foata normal form. 1/7845 useless extension candidates. Maximal degree in co-relation 44315. Up to 5853 conditions per place. [2024-11-28 03:18:06,710 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 323 selfloop transitions, 253 changer transitions 1/578 dead transitions. [2024-11-28 03:18:06,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 578 transitions, 8848 flow [2024-11-28 03:18:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:18:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 03:18:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 302 transitions. [2024-11-28 03:18:06,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.351981351981352 [2024-11-28 03:18:06,713 INFO L175 Difference]: Start difference. First operand has 214 places, 424 transitions, 6278 flow. Second operand 26 states and 302 transitions. [2024-11-28 03:18:06,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 578 transitions, 8848 flow [2024-11-28 03:18:06,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 578 transitions, 8547 flow, removed 131 selfloop flow, removed 8 redundant places. [2024-11-28 03:18:06,983 INFO L231 Difference]: Finished difference. Result has 235 places, 485 transitions, 7424 flow [2024-11-28 03:18:06,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7424, PETRI_PLACES=235, PETRI_TRANSITIONS=485} [2024-11-28 03:18:06,984 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 201 predicate places. [2024-11-28 03:18:06,984 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 485 transitions, 7424 flow [2024-11-28 03:18:06,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:06,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:06,985 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] [2024-11-28 03:18:06,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:18:07,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:18:07,186 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)] === [2024-11-28 03:18:07,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1456633480, now seen corresponding path program 8 times [2024-11-28 03:18:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:07,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817380653] [2024-11-28 03:18:07,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:18:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:07,240 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:18:07,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817380653] [2024-11-28 03:18:09,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817380653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474822788] [2024-11-28 03:18:09,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:18:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:09,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:09,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:18:09,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:18:09,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:09,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:18:09,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:09,724 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 [2024-11-28 03:18:10,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:10,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:18:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:18:10,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:18:11,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474822788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:11,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:11,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 22 [2024-11-28 03:18:11,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248028399] [2024-11-28 03:18:11,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:11,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:18:11,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:11,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:18:11,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:18:11,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:18:11,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 485 transitions, 7424 flow. Second operand has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:11,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:11,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:18:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:15,849 INFO L124 PetriNetUnfolderBase]: 6148/8865 cut-off events. [2024-11-28 03:18:15,850 INFO L125 PetriNetUnfolderBase]: For 70395/70395 co-relation queries the response was YES. [2024-11-28 03:18:15,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51352 conditions, 8865 events. 6148/8865 cut-off events. For 70395/70395 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47507 event pairs, 933 based on Foata normal form. 1/8866 useless extension candidates. Maximal degree in co-relation 50505. Up to 6765 conditions per place. [2024-11-28 03:18:15,981 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 330 selfloop transitions, 426 changer transitions 1/758 dead transitions. [2024-11-28 03:18:15,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 758 transitions, 12173 flow [2024-11-28 03:18:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:18:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:18:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2024-11-28 03:18:15,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-11-28 03:18:15,983 INFO L175 Difference]: Start difference. First operand has 235 places, 485 transitions, 7424 flow. Second operand 14 states and 167 transitions. [2024-11-28 03:18:15,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 758 transitions, 12173 flow [2024-11-28 03:18:16,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 758 transitions, 11624 flow, removed 267 selfloop flow, removed 6 redundant places. [2024-11-28 03:18:16,525 INFO L231 Difference]: Finished difference. Result has 249 places, 652 transitions, 10840 flow [2024-11-28 03:18:16,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10840, PETRI_PLACES=249, PETRI_TRANSITIONS=652} [2024-11-28 03:18:16,526 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 215 predicate places. [2024-11-28 03:18:16,526 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 652 transitions, 10840 flow [2024-11-28 03:18:16,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.173913043478261) internal successors, (142), 23 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:16,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:16,527 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] [2024-11-28 03:18:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:18:16,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:18:16,728 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)] === [2024-11-28 03:18:16,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -527794822, now seen corresponding path program 9 times [2024-11-28 03:18:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:16,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001517778] [2024-11-28 03:18:16,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:18:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:16,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:18:16,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001517778] [2024-11-28 03:18:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001517778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087061794] [2024-11-28 03:18:18,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:18:18,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:18,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:18:18,820 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:18:18,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:18,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:18:18,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:19,120 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 [2024-11-28 03:18:19,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:19,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-28 03:18:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:18:20,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:20,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:20,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 240 [2024-11-28 03:18:21,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:21,843 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 369 treesize of output 313 [2024-11-28 03:18:21,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:21,877 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 252 treesize of output 196 [2024-11-28 03:18:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:18:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087061794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:22,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2024-11-28 03:18:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624389724] [2024-11-28 03:18:22,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:22,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:18:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:22,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:18:22,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:18:22,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:18:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 652 transitions, 10840 flow. Second operand has 26 states, 26 states have (on average 6.269230769230769) internal successors, (163), 26 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:18:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:28,813 INFO L124 PetriNetUnfolderBase]: 6509/9380 cut-off events. [2024-11-28 03:18:28,813 INFO L125 PetriNetUnfolderBase]: For 87490/87490 co-relation queries the response was YES. [2024-11-28 03:18:28,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57803 conditions, 9380 events. 6509/9380 cut-off events. For 87490/87490 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49972 event pairs, 1342 based on Foata normal form. 1/9381 useless extension candidates. Maximal degree in co-relation 57409. Up to 8051 conditions per place. [2024-11-28 03:18:28,976 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 408 selfloop transitions, 348 changer transitions 1/758 dead transitions. [2024-11-28 03:18:28,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 758 transitions, 13348 flow [2024-11-28 03:18:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:18:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:18:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 266 transitions. [2024-11-28 03:18:28,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33585858585858586 [2024-11-28 03:18:28,978 INFO L175 Difference]: Start difference. First operand has 249 places, 652 transitions, 10840 flow. Second operand 24 states and 266 transitions. [2024-11-28 03:18:28,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 758 transitions, 13348 flow [2024-11-28 03:18:29,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 758 transitions, 12994 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-11-28 03:18:29,491 INFO L231 Difference]: Finished difference. Result has 273 places, 677 transitions, 11671 flow [2024-11-28 03:18:29,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10496, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11671, PETRI_PLACES=273, PETRI_TRANSITIONS=677} [2024-11-28 03:18:29,492 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 239 predicate places. [2024-11-28 03:18:29,492 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 677 transitions, 11671 flow [2024-11-28 03:18:29,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.269230769230769) internal successors, (163), 26 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:29,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:29,493 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] [2024-11-28 03:18:29,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:18:29,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:18:29,693 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)] === [2024-11-28 03:18:29,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1120260570, now seen corresponding path program 10 times [2024-11-28 03:18:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953672880] [2024-11-28 03:18:29,694 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:18:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:29,731 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:18:29,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953672880] [2024-11-28 03:18:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953672880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000386679] [2024-11-28 03:18:31,566 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:18:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:31,570 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:31,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:18:31,707 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:18:31,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:31,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:18:31,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:31,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-28 03:18:31,752 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 [2024-11-28 03:18:31,804 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:18:31,804 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 11 treesize of output 11 [2024-11-28 03:18:31,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-11-28 03:18:32,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 03:18:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:32,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:18:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000386679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:37,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 28 [2024-11-28 03:18:37,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781082704] [2024-11-28 03:18:37,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:37,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:18:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:37,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:18:37,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=709, Unknown=1, NotChecked=0, Total=812 [2024-11-28 03:18:38,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:18:38,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 677 transitions, 11671 flow. Second operand has 29 states, 29 states have (on average 6.0344827586206895) internal successors, (175), 29 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:38,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:38,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:18:38,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:43,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:47,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:51,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:56,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:00,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:05,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:09,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:14,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:18,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:22,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:26,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:30,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:35,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:39,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:43,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:47,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:51,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:55,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:00,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:03,911 INFO L124 PetriNetUnfolderBase]: 6986/10064 cut-off events. [2024-11-28 03:20:03,911 INFO L125 PetriNetUnfolderBase]: For 100556/100556 co-relation queries the response was YES. [2024-11-28 03:20:04,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63457 conditions, 10064 events. 6986/10064 cut-off events. For 100556/100556 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 54241 event pairs, 1416 based on Foata normal form. 1/10065 useless extension candidates. Maximal degree in co-relation 63183. Up to 8437 conditions per place. [2024-11-28 03:20:04,110 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 418 selfloop transitions, 410 changer transitions 1/830 dead transitions. [2024-11-28 03:20:04,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 830 transitions, 14847 flow [2024-11-28 03:20:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:20:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 03:20:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 308 transitions. [2024-11-28 03:20:04,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3218390804597701 [2024-11-28 03:20:04,112 INFO L175 Difference]: Start difference. First operand has 273 places, 677 transitions, 11671 flow. Second operand 29 states and 308 transitions. [2024-11-28 03:20:04,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 830 transitions, 14847 flow [2024-11-28 03:20:04,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 830 transitions, 14305 flow, removed 98 selfloop flow, removed 14 redundant places. [2024-11-28 03:20:04,960 INFO L231 Difference]: Finished difference. Result has 297 places, 739 transitions, 13162 flow [2024-11-28 03:20:04,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11129, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13162, PETRI_PLACES=297, PETRI_TRANSITIONS=739} [2024-11-28 03:20:04,961 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 263 predicate places. [2024-11-28 03:20:04,961 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 739 transitions, 13162 flow [2024-11-28 03:20:04,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.0344827586206895) internal successors, (175), 29 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:04,962 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] [2024-11-28 03:20:04,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:20:05,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:20:05,162 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)] === [2024-11-28 03:20:05,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 772347580, now seen corresponding path program 11 times [2024-11-28 03:20:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326645489] [2024-11-28 03:20:05,164 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:05,195 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:05,195 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326645489] [2024-11-28 03:20:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326645489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510619435] [2024-11-28 03:20:06,650 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:06,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:06,654 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:06,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:20:06,761 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:06,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:06,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:20:06,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:07,070 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 [2024-11-28 03:20:07,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:07,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-28 03:20:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:07,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:08,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:08,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 240 [2024-11-28 03:20:09,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:09,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 182 [2024-11-28 03:20:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510619435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:10,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:10,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-11-28 03:20:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253204392] [2024-11-28 03:20:10,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:10,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:20:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:10,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:20:10,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:20:10,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-11-28 03:20:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 739 transitions, 13162 flow. Second operand has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-11-28 03:20:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:18,747 INFO L124 PetriNetUnfolderBase]: 7730/11151 cut-off events. [2024-11-28 03:20:18,747 INFO L125 PetriNetUnfolderBase]: For 129558/129558 co-relation queries the response was YES. [2024-11-28 03:20:18,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72640 conditions, 11151 events. 7730/11151 cut-off events. For 129558/129558 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 61657 event pairs, 1669 based on Foata normal form. 1/11152 useless extension candidates. Maximal degree in co-relation 72148. Up to 9209 conditions per place. [2024-11-28 03:20:18,894 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 538 selfloop transitions, 355 changer transitions 1/895 dead transitions. [2024-11-28 03:20:18,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 895 transitions, 16707 flow [2024-11-28 03:20:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:20:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 03:20:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 301 transitions. [2024-11-28 03:20:18,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3508158508158508 [2024-11-28 03:20:18,896 INFO L175 Difference]: Start difference. First operand has 297 places, 739 transitions, 13162 flow. Second operand 26 states and 301 transitions. [2024-11-28 03:20:18,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 895 transitions, 16707 flow [2024-11-28 03:20:19,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 895 transitions, 16216 flow, removed 138 selfloop flow, removed 10 redundant places. [2024-11-28 03:20:19,515 INFO L231 Difference]: Finished difference. Result has 318 places, 804 transitions, 14918 flow [2024-11-28 03:20:19,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=12671, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14918, PETRI_PLACES=318, PETRI_TRANSITIONS=804} [2024-11-28 03:20:19,516 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 284 predicate places. [2024-11-28 03:20:19,516 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 804 transitions, 14918 flow [2024-11-28 03:20:19,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:19,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:19,517 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] [2024-11-28 03:20:19,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:19,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:20:19,717 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)] === [2024-11-28 03:20:19,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash 698935150, now seen corresponding path program 12 times [2024-11-28 03:20:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742834450] [2024-11-28 03:20:19,718 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:19,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:19,732 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:20:19,732 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:20,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:20,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742834450] [2024-11-28 03:20:20,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742834450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:20,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499042160] [2024-11-28 03:20:20,095 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:20,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:20,098 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:20,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:20:20,210 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:20:20,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:20,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:20:20,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:20,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:21,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499042160] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:21,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:20:21,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2024-11-28 03:20:21,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753661230] [2024-11-28 03:20:21,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:21,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:20:21,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:21,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:20:21,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:20:21,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:20:21,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 804 transitions, 14918 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:21,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:21,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:20:21,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:29,906 INFO L124 PetriNetUnfolderBase]: 15520/23232 cut-off events. [2024-11-28 03:20:29,907 INFO L125 PetriNetUnfolderBase]: For 265654/266974 co-relation queries the response was YES. [2024-11-28 03:20:30,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142970 conditions, 23232 events. 15520/23232 cut-off events. For 265654/266974 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 155525 event pairs, 1909 based on Foata normal form. 297/23387 useless extension candidates. Maximal degree in co-relation 142219. Up to 5647 conditions per place. [2024-11-28 03:20:30,335 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 1083 selfloop transitions, 381 changer transitions 0/1719 dead transitions. [2024-11-28 03:20:30,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1719 transitions, 30692 flow [2024-11-28 03:20:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:20:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:20:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 259 transitions. [2024-11-28 03:20:30,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49053030303030304 [2024-11-28 03:20:30,336 INFO L175 Difference]: Start difference. First operand has 318 places, 804 transitions, 14918 flow. Second operand 16 states and 259 transitions. [2024-11-28 03:20:30,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1719 transitions, 30692 flow [2024-11-28 03:20:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1719 transitions, 29049 flow, removed 750 selfloop flow, removed 12 redundant places. [2024-11-28 03:20:32,204 INFO L231 Difference]: Finished difference. Result has 329 places, 1045 transitions, 18471 flow [2024-11-28 03:20:32,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=14172, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18471, PETRI_PLACES=329, PETRI_TRANSITIONS=1045} [2024-11-28 03:20:32,205 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 295 predicate places. [2024-11-28 03:20:32,205 INFO L471 AbstractCegarLoop]: Abstraction has has 329 places, 1045 transitions, 18471 flow [2024-11-28 03:20:32,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:32,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:32,206 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] [2024-11-28 03:20:32,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:32,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:20:32,406 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)] === [2024-11-28 03:20:32,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash 655537857, now seen corresponding path program 13 times [2024-11-28 03:20:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:32,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865417672] [2024-11-28 03:20:32,407 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:32,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:32,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:32,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865417672] [2024-11-28 03:20:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865417672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:32,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978733905] [2024-11-28 03:20:32,686 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:32,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:32,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:32,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:32,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:20:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:32,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:20:32,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:33,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978733905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:33,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:33,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-28 03:20:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545682300] [2024-11-28 03:20:33,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:33,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:20:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:33,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:20:33,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:20:33,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:20:33,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1045 transitions, 18471 flow. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:33,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:33,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:20:33,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:40,982 INFO L124 PetriNetUnfolderBase]: 13010/19502 cut-off events. [2024-11-28 03:20:40,982 INFO L125 PetriNetUnfolderBase]: For 260861/262003 co-relation queries the response was YES. [2024-11-28 03:20:41,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128738 conditions, 19502 events. 13010/19502 cut-off events. For 260861/262003 co-relation queries the response was YES. Maximal size of possible extension queue 1078. Compared 126649 event pairs, 5163 based on Foata normal form. 197/19507 useless extension candidates. Maximal degree in co-relation 128549. Up to 9632 conditions per place. [2024-11-28 03:20:41,405 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 695 selfloop transitions, 12 changer transitions 0/905 dead transitions. [2024-11-28 03:20:41,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 905 transitions, 16457 flow [2024-11-28 03:20:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:20:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:20:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-11-28 03:20:41,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-11-28 03:20:41,406 INFO L175 Difference]: Start difference. First operand has 329 places, 1045 transitions, 18471 flow. Second operand 8 states and 104 transitions. [2024-11-28 03:20:41,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 905 transitions, 16457 flow [2024-11-28 03:20:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 905 transitions, 15482 flow, removed 118 selfloop flow, removed 23 redundant places. [2024-11-28 03:20:43,692 INFO L231 Difference]: Finished difference. Result has 294 places, 803 transitions, 12847 flow [2024-11-28 03:20:43,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=12823, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12847, PETRI_PLACES=294, PETRI_TRANSITIONS=803} [2024-11-28 03:20:43,694 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 260 predicate places. [2024-11-28 03:20:43,694 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 803 transitions, 12847 flow [2024-11-28 03:20:43,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:43,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:43,694 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] [2024-11-28 03:20:43,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:20:43,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:20:43,895 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)] === [2024-11-28 03:20:43,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1629450392, now seen corresponding path program 14 times [2024-11-28 03:20:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:43,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532347395] [2024-11-28 03:20:43,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:43,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:43,911 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:43,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:44,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:44,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532347395] [2024-11-28 03:20:44,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532347395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:44,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474674559] [2024-11-28 03:20:44,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:44,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:44,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:44,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:44,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:20:44,250 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:44,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:44,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:20:44,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:44,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474674559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:44,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:20:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411924555] [2024-11-28 03:20:44,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:44,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:20:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:44,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:20:44,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:20:44,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:20:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 803 transitions, 12847 flow. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:20:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:51,331 INFO L124 PetriNetUnfolderBase]: 12371/19470 cut-off events. [2024-11-28 03:20:51,331 INFO L125 PetriNetUnfolderBase]: For 289063/291088 co-relation queries the response was YES. [2024-11-28 03:20:51,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122736 conditions, 19470 events. 12371/19470 cut-off events. For 289063/291088 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 140104 event pairs, 2637 based on Foata normal form. 2333/21629 useless extension candidates. Maximal degree in co-relation 122013. Up to 7858 conditions per place. [2024-11-28 03:20:51,741 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 694 selfloop transitions, 135 changer transitions 0/1027 dead transitions. [2024-11-28 03:20:51,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1027 transitions, 17041 flow [2024-11-28 03:20:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:20:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:20:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-11-28 03:20:51,742 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2024-11-28 03:20:51,742 INFO L175 Difference]: Start difference. First operand has 294 places, 803 transitions, 12847 flow. Second operand 9 states and 136 transitions. [2024-11-28 03:20:51,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1027 transitions, 17041 flow [2024-11-28 03:20:53,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1027 transitions, 16952 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-28 03:20:53,768 INFO L231 Difference]: Finished difference. Result has 297 places, 737 transitions, 12454 flow [2024-11-28 03:20:53,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11846, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12454, PETRI_PLACES=297, PETRI_TRANSITIONS=737} [2024-11-28 03:20:53,770 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 263 predicate places. [2024-11-28 03:20:53,770 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 737 transitions, 12454 flow [2024-11-28 03:20:53,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:53,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:53,770 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] [2024-11-28 03:20:53,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:53,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:20:53,971 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)] === [2024-11-28 03:20:53,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1270672778, now seen corresponding path program 15 times [2024-11-28 03:20:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130313134] [2024-11-28 03:20:53,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:53,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:20:53,990 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130313134] [2024-11-28 03:20:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130313134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044736090] [2024-11-28 03:20:54,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:54,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:54,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:20:54,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:20:54,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:54,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:20:54,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:54,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:20:54,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044736090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:54,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:54,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-28 03:20:54,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527821999] [2024-11-28 03:20:54,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:54,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:20:54,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:54,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:20:54,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:20:54,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:20:54,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 737 transitions, 12454 flow. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:54,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:20:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:20:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:20:57,907 INFO L124 PetriNetUnfolderBase]: 6917/10878 cut-off events. [2024-11-28 03:20:57,907 INFO L125 PetriNetUnfolderBase]: For 165232/166206 co-relation queries the response was YES. [2024-11-28 03:20:58,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74244 conditions, 10878 events. 6917/10878 cut-off events. For 165232/166206 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 71294 event pairs, 3121 based on Foata normal form. 99/10860 useless extension candidates. Maximal degree in co-relation 73716. Up to 6062 conditions per place. [2024-11-28 03:20:58,135 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 341 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2024-11-28 03:20:58,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 526 transitions, 9044 flow [2024-11-28 03:20:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:20:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:20:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-11-28 03:20:58,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-11-28 03:20:58,137 INFO L175 Difference]: Start difference. First operand has 297 places, 737 transitions, 12454 flow. Second operand 7 states and 97 transitions. [2024-11-28 03:20:58,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 526 transitions, 9044 flow [2024-11-28 03:20:59,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 526 transitions, 8454 flow, removed 45 selfloop flow, removed 28 redundant places. [2024-11-28 03:20:59,249 INFO L231 Difference]: Finished difference. Result has 274 places, 513 transitions, 7671 flow [2024-11-28 03:20:59,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7671, PETRI_PLACES=274, PETRI_TRANSITIONS=513} [2024-11-28 03:20:59,250 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 240 predicate places. [2024-11-28 03:20:59,250 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 513 transitions, 7671 flow [2024-11-28 03:20:59,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:59,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:20:59,250 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:59,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:20:59,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:59,451 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)] === [2024-11-28 03:20:59,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 754783747, now seen corresponding path program 16 times [2024-11-28 03:20:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:59,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578372452] [2024-11-28 03:20:59,452 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:59,473 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:59,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:20:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578372452] [2024-11-28 03:20:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578372452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598802679] [2024-11-28 03:20:59,804 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:59,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:59,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:59,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:59,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:20:59,934 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:59,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:59,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:20:59,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:21:00,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:21:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598802679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:00,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:00,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-28 03:21:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060633706] [2024-11-28 03:21:00,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:00,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:21:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:00,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:21:00,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:21:00,676 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:21:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 513 transitions, 7671 flow. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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) [2024-11-28 03:21:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:21:00,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:05,649 INFO L124 PetriNetUnfolderBase]: 6953/10974 cut-off events. [2024-11-28 03:21:05,650 INFO L125 PetriNetUnfolderBase]: For 161743/162626 co-relation queries the response was YES. [2024-11-28 03:21:05,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73674 conditions, 10974 events. 6953/10974 cut-off events. For 161743/162626 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 72700 event pairs, 1601 based on Foata normal form. 175/11057 useless extension candidates. Maximal degree in co-relation 73190. Up to 3386 conditions per place. [2024-11-28 03:21:05,852 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 306 selfloop transitions, 142 changer transitions 0/624 dead transitions. [2024-11-28 03:21:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 624 transitions, 10025 flow [2024-11-28 03:21:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:21:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:21:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 222 transitions. [2024-11-28 03:21:05,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-11-28 03:21:05,854 INFO L175 Difference]: Start difference. First operand has 274 places, 513 transitions, 7671 flow. Second operand 15 states and 222 transitions. [2024-11-28 03:21:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 624 transitions, 10025 flow [2024-11-28 03:21:06,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 624 transitions, 9966 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 03:21:06,634 INFO L231 Difference]: Finished difference. Result has 282 places, 521 transitions, 8075 flow [2024-11-28 03:21:06,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7612, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8075, PETRI_PLACES=282, PETRI_TRANSITIONS=521} [2024-11-28 03:21:06,634 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 248 predicate places. [2024-11-28 03:21:06,635 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 521 transitions, 8075 flow [2024-11-28 03:21:06,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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) [2024-11-28 03:21:06,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:06,635 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:06,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:21:06,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:06,836 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)] === [2024-11-28 03:21:06,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1211740909, now seen corresponding path program 17 times [2024-11-28 03:21:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:06,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869908187] [2024-11-28 03:21:06,836 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:06,854 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:06,854 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:21:07,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869908187] [2024-11-28 03:21:07,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869908187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:07,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243009156] [2024-11-28 03:21:07,037 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:07,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:07,041 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:07,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:21:07,179 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:07,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:07,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:21:07,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:21:07,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:21:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243009156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:07,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:21:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113587626] [2024-11-28 03:21:07,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:07,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:21:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:07,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:21:07,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:21:07,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:21:07,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 521 transitions, 8075 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:07,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:07,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:21:07,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:11,102 INFO L124 PetriNetUnfolderBase]: 7394/11540 cut-off events. [2024-11-28 03:21:11,102 INFO L125 PetriNetUnfolderBase]: For 198990/200163 co-relation queries the response was YES. [2024-11-28 03:21:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83641 conditions, 11540 events. 7394/11540 cut-off events. For 198990/200163 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 74929 event pairs, 2856 based on Foata normal form. 333/11755 useless extension candidates. Maximal degree in co-relation 83238. Up to 6075 conditions per place. [2024-11-28 03:21:11,291 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 412 selfloop transitions, 63 changer transitions 0/651 dead transitions. [2024-11-28 03:21:11,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 651 transitions, 10681 flow [2024-11-28 03:21:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:21:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:21:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-11-28 03:21:11,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2024-11-28 03:21:11,292 INFO L175 Difference]: Start difference. First operand has 282 places, 521 transitions, 8075 flow. Second operand 9 states and 136 transitions. [2024-11-28 03:21:11,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 651 transitions, 10681 flow [2024-11-28 03:21:11,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 651 transitions, 10313 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-11-28 03:21:11,976 INFO L231 Difference]: Finished difference. Result has 283 places, 523 transitions, 8044 flow [2024-11-28 03:21:11,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7804, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8044, PETRI_PLACES=283, PETRI_TRANSITIONS=523} [2024-11-28 03:21:11,977 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 249 predicate places. [2024-11-28 03:21:11,977 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 523 transitions, 8044 flow [2024-11-28 03:21:11,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:11,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:11,978 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] [2024-11-28 03:21:11,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:21:12,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:21:12,178 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)] === [2024-11-28 03:21:12,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash -824225872, now seen corresponding path program 1 times [2024-11-28 03:21:12,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:12,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132595629] [2024-11-28 03:21:12,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:21:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:21:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:21:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132595629] [2024-11-28 03:21:12,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132595629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852788909] [2024-11-28 03:21:12,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:21:12,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:12,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:12,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f49ace5-0f3f-4403-9434-837270348a6c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:21:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:21:12,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:21:12,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:21:12,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:21:13,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852788909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:13,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:13,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:21:13,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543490874] [2024-11-28 03:21:13,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:13,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:21:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:13,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:21:13,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:21:13,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-11-28 03:21:13,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 523 transitions, 8044 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:13,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:13,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-11-28 03:21:13,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:15,935 INFO L124 PetriNetUnfolderBase]: 4621/7210 cut-off events. [2024-11-28 03:21:15,935 INFO L125 PetriNetUnfolderBase]: For 169621/170718 co-relation queries the response was YES. [2024-11-28 03:21:16,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58289 conditions, 7210 events. 4621/7210 cut-off events. For 169621/170718 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42335 event pairs, 1849 based on Foata normal form. 377/7504 useless extension candidates. Maximal degree in co-relation 57893. Up to 3763 conditions per place. [2024-11-28 03:21:16,082 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 294 selfloop transitions, 35 changer transitions 0/405 dead transitions. [2024-11-28 03:21:16,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 405 transitions, 7375 flow [2024-11-28 03:21:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:21:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:21:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-11-28 03:21:16,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-11-28 03:21:16,083 INFO L175 Difference]: Start difference. First operand has 283 places, 523 transitions, 8044 flow. Second operand 8 states and 112 transitions. [2024-11-28 03:21:16,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 405 transitions, 7375 flow