./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:43:16,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:43:16,329 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:43:16,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:43:16,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:43:16,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:43:16,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:43:16,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:43:16,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:43:16,361 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:43:16,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:43:16,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:43:16,361 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:43:16,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:43:16,362 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:43:16,362 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:43:16,363 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:43:16,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:43:16,364 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:43:16,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:43:16,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:43:16,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:43:16,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:43:16,366 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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-11-28 03:43:16,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:43:16,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:43:16,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:43:16,673 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:43:16,674 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:43:16,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-28 03:43:19,717 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/data/a8e24d2f4/5cf94c8fbc584e069973790dc7dee575/FLAGb18b3ad74 [2024-11-28 03:43:20,007 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:43:20,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-28 03:43:20,014 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/data/a8e24d2f4/5cf94c8fbc584e069973790dc7dee575/FLAGb18b3ad74 [2024-11-28 03:43:20,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/data/a8e24d2f4/5cf94c8fbc584e069973790dc7dee575 [2024-11-28 03:43:20,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:43:20,280 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:43:20,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:43:20,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:43:20,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:43:20,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa5d9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20, skipping insertion in model container [2024-11-28 03:43:20,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,307 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:43:20,535 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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-28 03:43:20,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:43:20,554 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:43:20,580 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_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-28 03:43:20,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:43:20,601 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:43:20,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20 WrapperNode [2024-11-28 03:43:20,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:43:20,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:43:20,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:43:20,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:43:20,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,650 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2024-11-28 03:43:20,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:43:20,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:43:20,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:43:20,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:43:20,663 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,666 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,681 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 03:43:20,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,688 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:43:20,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:43:20,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:43:20,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:43:20,700 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (1/1) ... [2024-11-28 03:43:20,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:43:20,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:20,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:43:20,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:43:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:43:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:43:20,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:43:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:43:20,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:43:20,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:43:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:43:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:43:20,781 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 03:43:20,908 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:43:20,911 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:43:21,380 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:43:21,381 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:43:21,783 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:43:21,783 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:43:21,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:21 BoogieIcfgContainer [2024-11-28 03:43:21,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:43:21,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:43:21,789 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:43:21,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:43:21,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:43:20" (1/3) ... [2024-11-28 03:43:21,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c423668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:43:21, skipping insertion in model container [2024-11-28 03:43:21,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:20" (2/3) ... [2024-11-28 03:43:21,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c423668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:43:21, skipping insertion in model container [2024-11-28 03:43:21,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:21" (3/3) ... [2024-11-28 03:43:21,798 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-28 03:43:21,816 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:43:21,818 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 03:43:21,818 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:43:21,910 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:43:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 03:43:22,002 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-28 03:43:22,006 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:43:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-28 03:43:22,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 03:43:22,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-28 03:43:22,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:43:22,040 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;@67e8e55d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:43:22,041 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 03:43:22,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:43:22,058 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-28 03:43:22,058 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:43:22,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:22,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:22,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:22,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1701989740, now seen corresponding path program 1 times [2024-11-28 03:43:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:22,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919670094] [2024-11-28 03:43:22,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:22,670 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 03:43:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:22,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919670094] [2024-11-28 03:43:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919670094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:22,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:22,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:43:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927575081] [2024-11-28 03:43:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:22,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:43:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:22,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:43:22,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:43:22,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:22,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 03:43:22,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:22,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:22,892 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-28 03:43:22,892 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 03:43:22,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-28 03:43:22,896 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-28 03:43:22,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-28 03:43:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:43:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:43:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-28 03:43:22,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 03:43:22,923 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-28 03:43:22,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-28 03:43:22,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:43:22,933 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-28 03:43:22,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-28 03:43:22,941 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-28 03:43:22,941 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-28 03:43:22,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 03:43:22,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:22,942 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:22,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:43:22,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:22,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2014155131, now seen corresponding path program 1 times [2024-11-28 03:43:22,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:22,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669484078] [2024-11-28 03:43:22,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:23,848 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 03:43:23,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669484078] [2024-11-28 03:43:23,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669484078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:23,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:23,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:23,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260556851] [2024-11-28 03:43:23,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:23,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:23,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:23,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:23,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:23,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:23,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:23,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:23,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:24,163 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2024-11-28 03:43:24,164 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:43:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 68/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 1 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 243. Up to 80 conditions per place. [2024-11-28 03:43:24,166 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-11-28 03:43:24,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2024-11-28 03:43:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-28 03:43:24,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:43:24,168 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2024-11-28 03:43:24,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2024-11-28 03:43:24,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:43:24,171 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2024-11-28 03:43:24,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-11-28 03:43:24,172 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-28 03:43:24,172 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2024-11-28 03:43:24,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:24,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:24,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:24,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:43:24,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:24,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash -967235533, now seen corresponding path program 2 times [2024-11-28 03:43:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:24,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106788930] [2024-11-28 03:43:24,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:43:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:24,227 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:43:24,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:24,719 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 03:43:24,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:24,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106788930] [2024-11-28 03:43:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106788930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:24,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:24,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432920466] [2024-11-28 03:43:24,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:24,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:24,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:24,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:24,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:24,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:24,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:24,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:24,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:24,973 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2024-11-28 03:43:24,974 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-28 03:43:24,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 134 events. 77/134 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 330 event pairs, 9 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 403. Up to 89 conditions per place. [2024-11-28 03:43:24,976 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-28 03:43:24,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2024-11-28 03:43:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-28 03:43:24,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-28 03:43:24,979 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2024-11-28 03:43:24,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2024-11-28 03:43:24,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-28 03:43:24,983 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2024-11-28 03:43:24,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-11-28 03:43:24,986 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-28 03:43:24,987 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2024-11-28 03:43:24,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:24,987 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:24,987 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:24,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:43:24,988 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:24,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1287753109, now seen corresponding path program 3 times [2024-11-28 03:43:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037458957] [2024-11-28 03:43:24,990 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:43:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:25,039 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:43:25,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:25,245 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 03:43:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037458957] [2024-11-28 03:43:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037458957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:25,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:25,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:25,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33352091] [2024-11-28 03:43:25,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:25,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:25,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:25,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:25,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:25,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:25,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:43:25,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:25,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:25,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:25,475 INFO L124 PetriNetUnfolderBase]: 91/169 cut-off events. [2024-11-28 03:43:25,477 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-28 03:43:25,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 169 events. 91/169 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 485 event pairs, 20 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 578. Up to 82 conditions per place. [2024-11-28 03:43:25,481 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 40 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-11-28 03:43:25,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 388 flow [2024-11-28 03:43:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:43:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-11-28 03:43:25,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-28 03:43:25,485 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 5 states and 54 transitions. [2024-11-28 03:43:25,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 388 flow [2024-11-28 03:43:25,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 364 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 03:43:25,491 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 254 flow [2024-11-28 03:43:25,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2024-11-28 03:43:25,493 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-11-28 03:43:25,493 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 254 flow [2024-11-28 03:43:25,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:43:25,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:25,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:25,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:43:25,496 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:25,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1074088579, now seen corresponding path program 4 times [2024-11-28 03:43:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349524162] [2024-11-28 03:43:25,497 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:43:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:25,544 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:43:25,545 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:26,028 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 03:43:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:26,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349524162] [2024-11-28 03:43:26,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349524162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:26,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:26,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:26,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170809673] [2024-11-28 03:43:26,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:26,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:26,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:26,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:26,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:26,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:26,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:26,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:26,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:26,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:26,239 INFO L124 PetriNetUnfolderBase]: 89/161 cut-off events. [2024-11-28 03:43:26,239 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-28 03:43:26,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 161 events. 89/161 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 437 event pairs, 7 based on Foata normal form. 3/151 useless extension candidates. Maximal degree in co-relation 588. Up to 115 conditions per place. [2024-11-28 03:43:26,242 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-28 03:43:26,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 379 flow [2024-11-28 03:43:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:43:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-28 03:43:26,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:43:26,247 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 254 flow. Second operand 6 states and 60 transitions. [2024-11-28 03:43:26,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 379 flow [2024-11-28 03:43:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 375 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-28 03:43:26,255 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 293 flow [2024-11-28 03:43:26,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-11-28 03:43:26,256 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2024-11-28 03:43:26,256 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 293 flow [2024-11-28 03:43:26,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:26,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:26,256 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:26,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:43:26,260 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:26,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1570479623, now seen corresponding path program 5 times [2024-11-28 03:43:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369831302] [2024-11-28 03:43:26,261 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:43:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:26,301 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:43:26,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:26,502 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 03:43:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369831302] [2024-11-28 03:43:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369831302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:26,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:26,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557122213] [2024-11-28 03:43:26,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:26,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:26,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:26,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:26,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:26,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:26,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:43:26,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:26,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:26,646 INFO L124 PetriNetUnfolderBase]: 102/181 cut-off events. [2024-11-28 03:43:26,647 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-11-28 03:43:26,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 181 events. 102/181 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 512 event pairs, 30 based on Foata normal form. 2/165 useless extension candidates. Maximal degree in co-relation 705. Up to 139 conditions per place. [2024-11-28 03:43:26,649 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2024-11-28 03:43:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 430 flow [2024-11-28 03:43:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:43:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-28 03:43:26,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-28 03:43:26,650 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 293 flow. Second operand 5 states and 47 transitions. [2024-11-28 03:43:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 430 flow [2024-11-28 03:43:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 403 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-28 03:43:26,656 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 341 flow [2024-11-28 03:43:26,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-28 03:43:26,657 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-11-28 03:43:26,657 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 341 flow [2024-11-28 03:43:26,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 03:43:26,657 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:26,657 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:26,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:43:26,657 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:26,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1569884977, now seen corresponding path program 6 times [2024-11-28 03:43:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:26,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008153398] [2024-11-28 03:43:26,658 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:43:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:26,679 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 03:43:26,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:26,965 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 03:43:26,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:26,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008153398] [2024-11-28 03:43:26,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008153398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:26,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:26,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:26,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072482066] [2024-11-28 03:43:26,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:26,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:26,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:26,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:26,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:26,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:43:26,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:26,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:43:26,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:43:26,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:43:27,171 INFO L124 PetriNetUnfolderBase]: 119/219 cut-off events. [2024-11-28 03:43:27,171 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-11-28 03:43:27,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 219 events. 119/219 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 697 event pairs, 3 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 921. Up to 90 conditions per place. [2024-11-28 03:43:27,174 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 28 changer transitions 2/66 dead transitions. [2024-11-28 03:43:27,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 560 flow [2024-11-28 03:43:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:43:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:43:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-11-28 03:43:27,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-28 03:43:27,175 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 341 flow. Second operand 8 states and 76 transitions. [2024-11-28 03:43:27,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 560 flow [2024-11-28 03:43:27,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 534 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:43:27,182 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 454 flow [2024-11-28 03:43:27,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=454, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2024-11-28 03:43:27,183 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2024-11-28 03:43:27,183 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 454 flow [2024-11-28 03:43:27,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 03:43:27,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:43:27,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:27,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:43:27,184 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:43:27,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1923755773, now seen corresponding path program 1 times [2024-11-28 03:43:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:27,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866386285] [2024-11-28 03:43:27,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:27,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:43:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866386285] [2024-11-28 03:43:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866386285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860778048] [2024-11-28 03:43:27,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:27,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:27,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:27,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:43:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:27,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:43:27,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:27,652 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 03:43:28,068 INFO L349 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2024-11-28 03:43:28,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 223 treesize of output 152 [2024-11-28 03:43:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:28,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:29,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2024-11-28 03:43:29,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:43:29,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1500 treesize of output 1148 [2024-11-28 03:44:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860778048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:12,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-28 03:44:12,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545697476] [2024-11-28 03:44:12,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:12,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:44:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:12,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:44:12,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:44:12,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:44:12,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 454 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 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 03:44:12,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:12,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:44:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:13,319 INFO L124 PetriNetUnfolderBase]: 283/515 cut-off events. [2024-11-28 03:44:13,319 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-11-28 03:44:13,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 515 events. 283/515 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2156 event pairs, 17 based on Foata normal form. 6/470 useless extension candidates. Maximal degree in co-relation 2085. Up to 183 conditions per place. [2024-11-28 03:44:13,324 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 64 selfloop transitions, 43 changer transitions 58/166 dead transitions. [2024-11-28 03:44:13,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 166 transitions, 1560 flow [2024-11-28 03:44:13,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:44:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:44:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 210 transitions. [2024-11-28 03:44:13,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-28 03:44:13,327 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 454 flow. Second operand 24 states and 210 transitions. [2024-11-28 03:44:13,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 166 transitions, 1560 flow [2024-11-28 03:44:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 166 transitions, 1380 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-28 03:44:13,344 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 662 flow [2024-11-28 03:44:13,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=662, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-11-28 03:44:13,347 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2024-11-28 03:44:13,348 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 662 flow [2024-11-28 03:44:13,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 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 03:44:13,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:13,349 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:13,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:13,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:13,553 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:44:13,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1676391708, now seen corresponding path program 1 times [2024-11-28 03:44:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:13,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117289248] [2024-11-28 03:44:13,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:44:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117289248] [2024-11-28 03:44:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117289248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211856944] [2024-11-28 03:44:13,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:13,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:13,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:44:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:13,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:44:13,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:13,842 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 03:44:14,134 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:44:14,134 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 115 treesize of output 104 [2024-11-28 03:44:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:14,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:15,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-28 03:44:15,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:44:15,161 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-11-28 03:44:16,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-28 03:44:16,299 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 03:44:16,300 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 62 treesize of output 1 [2024-11-28 03:44:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211856944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:16,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-28 03:44:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746966840] [2024-11-28 03:44:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:16,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:44:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:16,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:44:16,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:44:16,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:44:16,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 662 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 03:44:16,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:16,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:44:16,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:19,656 INFO L124 PetriNetUnfolderBase]: 309/624 cut-off events. [2024-11-28 03:44:19,656 INFO L125 PetriNetUnfolderBase]: For 2512/2512 co-relation queries the response was YES. [2024-11-28 03:44:19,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 624 events. 309/624 cut-off events. For 2512/2512 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3020 event pairs, 8 based on Foata normal form. 10/622 useless extension candidates. Maximal degree in co-relation 3013. Up to 205 conditions per place. [2024-11-28 03:44:19,665 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 109 selfloop transitions, 68 changer transitions 38/216 dead transitions. [2024-11-28 03:44:19,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 216 transitions, 1993 flow [2024-11-28 03:44:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:44:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 03:44:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 298 transitions. [2024-11-28 03:44:19,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4257142857142857 [2024-11-28 03:44:19,669 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 662 flow. Second operand 35 states and 298 transitions. [2024-11-28 03:44:19,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 216 transitions, 1993 flow [2024-11-28 03:44:19,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 216 transitions, 1804 flow, removed 65 selfloop flow, removed 11 redundant places. [2024-11-28 03:44:19,689 INFO L231 Difference]: Finished difference. Result has 110 places, 94 transitions, 1051 flow [2024-11-28 03:44:19,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1051, PETRI_PLACES=110, PETRI_TRANSITIONS=94} [2024-11-28 03:44:19,690 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 89 predicate places. [2024-11-28 03:44:19,690 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 94 transitions, 1051 flow [2024-11-28 03:44:19,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 03:44:19,691 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:44:19,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:19,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:19,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:44:19,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:44:19,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash -49087750, now seen corresponding path program 2 times [2024-11-28 03:44:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:19,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558698766] [2024-11-28 03:44:19,892 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:19,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:19,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:19,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:44:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558698766] [2024-11-28 03:44:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558698766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159481827] [2024-11-28 03:44:20,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:20,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:20,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:44:20,352 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:20,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:20,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:44:20,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:44:20,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:23,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-28 03:44:23,062 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:44:23,063 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 19 treesize of output 7 [2024-11-28 03:44:23,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-28 03:44:23,096 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:44:23,096 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 19 treesize of output 7 [2024-11-28 03:44:23,150 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-11-28 03:44:23,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2024-11-28 03:44:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:44:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159481827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:23,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:23,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-28 03:44:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421555992] [2024-11-28 03:44:23,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:23,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:44:23,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:23,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:44:23,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:44:23,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:44:23,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 94 transitions, 1051 flow. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:23,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:44:23,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:44:23,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:44:36,030 WARN L286 SmtUtils]: Spent 11.51s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:45:19,478 WARN L286 SmtUtils]: Spent 43.36s on a formula simplification. DAG size of input: 89 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:45:21,825 INFO L124 PetriNetUnfolderBase]: 329/672 cut-off events. [2024-11-28 03:45:21,826 INFO L125 PetriNetUnfolderBase]: For 4556/4556 co-relation queries the response was YES. [2024-11-28 03:45:21,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 672 events. 329/672 cut-off events. For 4556/4556 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3393 event pairs, 26 based on Foata normal form. 9/665 useless extension candidates. Maximal degree in co-relation 3724. Up to 407 conditions per place. [2024-11-28 03:45:21,834 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 86 selfloop transitions, 68 changer transitions 10/165 dead transitions. [2024-11-28 03:45:21,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 165 transitions, 1945 flow [2024-11-28 03:45:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:45:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:45:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 139 transitions. [2024-11-28 03:45:21,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-11-28 03:45:21,838 INFO L175 Difference]: Start difference. First operand has 110 places, 94 transitions, 1051 flow. Second operand 16 states and 139 transitions. [2024-11-28 03:45:21,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 165 transitions, 1945 flow [2024-11-28 03:45:21,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 165 transitions, 1558 flow, removed 136 selfloop flow, removed 21 redundant places. [2024-11-28 03:45:21,866 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1323 flow [2024-11-28 03:45:21,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1323, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-11-28 03:45:21,867 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-11-28 03:45:21,868 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1323 flow [2024-11-28 03:45:21,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:21,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:21,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:21,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:45:22,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:22,073 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:22,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash 29560490, now seen corresponding path program 3 times [2024-11-28 03:45:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894971597] [2024-11-28 03:45:22,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:22,103 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:22,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:22,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894971597] [2024-11-28 03:45:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894971597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499554997] [2024-11-28 03:45:22,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:22,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:22,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:45:22,383 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:22,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:22,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:45:22,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:22,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:22,623 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 115 treesize of output 109 [2024-11-28 03:45:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:22,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:23,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-28 03:45:23,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-28 03:45:23,694 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:23,694 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 19 treesize of output 7 [2024-11-28 03:45:23,737 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-11-28 03:45:23,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2024-11-28 03:45:23,785 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:23,785 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 19 treesize of output 7 [2024-11-28 03:45:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:23,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499554997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:23,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:23,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-28 03:45:23,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968655270] [2024-11-28 03:45:23,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:23,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:45:23,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:23,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:45:23,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:45:23,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:23,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1323 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 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 03:45:23,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:23,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:23,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:24,687 INFO L124 PetriNetUnfolderBase]: 319/653 cut-off events. [2024-11-28 03:45:24,687 INFO L125 PetriNetUnfolderBase]: For 3903/3903 co-relation queries the response was YES. [2024-11-28 03:45:24,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 653 events. 319/653 cut-off events. For 3903/3903 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3238 event pairs, 25 based on Foata normal form. 6/650 useless extension candidates. Maximal degree in co-relation 3530. Up to 398 conditions per place. [2024-11-28 03:45:24,695 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 91 selfloop transitions, 65 changer transitions 10/167 dead transitions. [2024-11-28 03:45:24,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 167 transitions, 1857 flow [2024-11-28 03:45:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:45:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 03:45:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2024-11-28 03:45:24,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147058823529412 [2024-11-28 03:45:24,696 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1323 flow. Second operand 17 states and 141 transitions. [2024-11-28 03:45:24,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 167 transitions, 1857 flow [2024-11-28 03:45:24,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 167 transitions, 1730 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-11-28 03:45:24,722 INFO L231 Difference]: Finished difference. Result has 120 places, 128 transitions, 1391 flow [2024-11-28 03:45:24,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1391, PETRI_PLACES=120, PETRI_TRANSITIONS=128} [2024-11-28 03:45:24,725 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2024-11-28 03:45:24,725 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 128 transitions, 1391 flow [2024-11-28 03:45:24,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 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 03:45:24,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:24,725 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:24,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:45:24,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:24,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:24,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -829908686, now seen corresponding path program 4 times [2024-11-28 03:45:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:24,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159012389] [2024-11-28 03:45:24,930 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:24,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:24,970 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:24,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159012389] [2024-11-28 03:45:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159012389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956736732] [2024-11-28 03:45:25,148 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:25,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:25,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:25,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:45:25,241 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:25,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:25,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:45:25,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:25,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:25,642 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-11-28 03:45:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:25,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:25,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:25,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-11-28 03:45:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:27,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956736732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:27,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:27,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-28 03:45:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626942427] [2024-11-28 03:45:27,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:27,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:45:27,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:27,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:45:27,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:45:27,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:27,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 128 transitions, 1391 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:27,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:27,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:27,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:28,337 INFO L124 PetriNetUnfolderBase]: 329/697 cut-off events. [2024-11-28 03:45:28,337 INFO L125 PetriNetUnfolderBase]: For 4824/4824 co-relation queries the response was YES. [2024-11-28 03:45:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3970 conditions, 697 events. 329/697 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3663 event pairs, 5 based on Foata normal form. 6/703 useless extension candidates. Maximal degree in co-relation 3803. Up to 330 conditions per place. [2024-11-28 03:45:28,345 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 100 selfloop transitions, 75 changer transitions 6/182 dead transitions. [2024-11-28 03:45:28,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2121 flow [2024-11-28 03:45:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:45:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:45:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 125 transitions. [2024-11-28 03:45:28,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-28 03:45:28,347 INFO L175 Difference]: Start difference. First operand has 120 places, 128 transitions, 1391 flow. Second operand 15 states and 125 transitions. [2024-11-28 03:45:28,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2121 flow [2024-11-28 03:45:28,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 2034 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-11-28 03:45:28,377 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1679 flow [2024-11-28 03:45:28,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1679, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2024-11-28 03:45:28,378 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-11-28 03:45:28,378 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1679 flow [2024-11-28 03:45:28,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:28,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:28,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:28,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:45:28,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:28,579 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:28,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -952962380, now seen corresponding path program 5 times [2024-11-28 03:45:28,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:28,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100381766] [2024-11-28 03:45:28,580 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:28,611 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:28,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100381766] [2024-11-28 03:45:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100381766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241308690] [2024-11-28 03:45:28,825 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:28,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:28,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:28,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:28,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:45:28,912 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:28,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:28,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 03:45:28,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:28,941 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 03:45:29,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:29,083 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 114 treesize of output 106 [2024-11-28 03:45:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:29,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:30,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-28 03:45:30,342 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:30,342 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 62 treesize of output 41 [2024-11-28 03:45:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:30,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241308690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:30,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:30,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 20 [2024-11-28 03:45:30,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301822641] [2024-11-28 03:45:30,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:30,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:45:30,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:30,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:45:30,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:45:30,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:30,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1679 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:30,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:30,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:30,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:31,765 INFO L124 PetriNetUnfolderBase]: 351/743 cut-off events. [2024-11-28 03:45:31,765 INFO L125 PetriNetUnfolderBase]: For 6444/6444 co-relation queries the response was YES. [2024-11-28 03:45:31,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4599 conditions, 743 events. 351/743 cut-off events. For 6444/6444 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3982 event pairs, 18 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4418. Up to 507 conditions per place. [2024-11-28 03:45:31,773 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 118 selfloop transitions, 73 changer transitions 4/196 dead transitions. [2024-11-28 03:45:31,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 196 transitions, 2487 flow [2024-11-28 03:45:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:45:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:45:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 131 transitions. [2024-11-28 03:45:31,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2024-11-28 03:45:31,775 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1679 flow. Second operand 15 states and 131 transitions. [2024-11-28 03:45:31,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 196 transitions, 2487 flow [2024-11-28 03:45:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 196 transitions, 2345 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-11-28 03:45:31,821 INFO L231 Difference]: Finished difference. Result has 137 places, 156 transitions, 1950 flow [2024-11-28 03:45:31,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1950, PETRI_PLACES=137, PETRI_TRANSITIONS=156} [2024-11-28 03:45:31,822 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2024-11-28 03:45:31,822 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 156 transitions, 1950 flow [2024-11-28 03:45:31,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:31,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:31,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:31,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:45:32,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:45:32,027 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:32,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1385764782, now seen corresponding path program 6 times [2024-11-28 03:45:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:32,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434543536] [2024-11-28 03:45:32,028 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:45:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:32,077 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:45:32,078 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434543536] [2024-11-28 03:45:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434543536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596993873] [2024-11-28 03:45:32,341 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:45:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:32,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:32,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:45:32,535 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:45:32,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:32,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:45:32,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:32,570 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 03:45:33,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:33,009 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-11-28 03:45:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:33,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:33,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-28 03:45:33,546 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:33,547 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 62 treesize of output 41 [2024-11-28 03:45:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:33,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596993873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:33,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:33,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-28 03:45:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070816923] [2024-11-28 03:45:33,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:33,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:45:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:33,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:45:33,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:45:33,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:33,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 156 transitions, 1950 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 03:45:33,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:33,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:33,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:34,595 INFO L124 PetriNetUnfolderBase]: 352/780 cut-off events. [2024-11-28 03:45:34,596 INFO L125 PetriNetUnfolderBase]: For 5621/5621 co-relation queries the response was YES. [2024-11-28 03:45:34,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4757 conditions, 780 events. 352/780 cut-off events. For 5621/5621 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4434 event pairs, 8 based on Foata normal form. 6/785 useless extension candidates. Maximal degree in co-relation 4632. Up to 259 conditions per place. [2024-11-28 03:45:34,605 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 97 selfloop transitions, 106 changer transitions 4/208 dead transitions. [2024-11-28 03:45:34,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 208 transitions, 2701 flow [2024-11-28 03:45:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:45:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:45:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2024-11-28 03:45:34,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-11-28 03:45:34,607 INFO L175 Difference]: Start difference. First operand has 137 places, 156 transitions, 1950 flow. Second operand 18 states and 137 transitions. [2024-11-28 03:45:34,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 208 transitions, 2701 flow [2024-11-28 03:45:34,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 208 transitions, 2554 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-11-28 03:45:34,642 INFO L231 Difference]: Finished difference. Result has 148 places, 168 transitions, 2252 flow [2024-11-28 03:45:34,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2252, PETRI_PLACES=148, PETRI_TRANSITIONS=168} [2024-11-28 03:45:34,643 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2024-11-28 03:45:34,643 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 168 transitions, 2252 flow [2024-11-28 03:45:34,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 03:45:34,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:34,644 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:34,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:45:34,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:34,845 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:34,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2109947552, now seen corresponding path program 7 times [2024-11-28 03:45:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751515019] [2024-11-28 03:45:34,845 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:45:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751515019] [2024-11-28 03:45:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751515019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:35,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121719181] [2024-11-28 03:45:35,025 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:45:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:35,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:35,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:45:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:35,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:45:35,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:35,154 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 03:45:35,434 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:35,435 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 115 treesize of output 104 [2024-11-28 03:45:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:35,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:36,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-28 03:45:36,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:36,788 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-11-28 03:45:37,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-28 03:45:37,736 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 03:45:37,737 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 62 treesize of output 1 [2024-11-28 03:45:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121719181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:37,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:37,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-28 03:45:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696074991] [2024-11-28 03:45:37,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:37,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:45:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:37,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:45:37,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:45:37,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:37,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 168 transitions, 2252 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 03:45:37,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:37,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:37,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:39,525 INFO L124 PetriNetUnfolderBase]: 350/772 cut-off events. [2024-11-28 03:45:39,526 INFO L125 PetriNetUnfolderBase]: For 6711/6711 co-relation queries the response was YES. [2024-11-28 03:45:39,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 772 events. 350/772 cut-off events. For 6711/6711 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4321 event pairs, 17 based on Foata normal form. 7/779 useless extension candidates. Maximal degree in co-relation 4917. Up to 513 conditions per place. [2024-11-28 03:45:39,534 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 125 selfloop transitions, 83 changer transitions 6/215 dead transitions. [2024-11-28 03:45:39,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 215 transitions, 2906 flow [2024-11-28 03:45:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:45:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 03:45:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 174 transitions. [2024-11-28 03:45:39,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-11-28 03:45:39,537 INFO L175 Difference]: Start difference. First operand has 148 places, 168 transitions, 2252 flow. Second operand 22 states and 174 transitions. [2024-11-28 03:45:39,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 215 transitions, 2906 flow [2024-11-28 03:45:39,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 215 transitions, 2659 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-11-28 03:45:39,574 INFO L231 Difference]: Finished difference. Result has 160 places, 168 transitions, 2181 flow [2024-11-28 03:45:39,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2181, PETRI_PLACES=160, PETRI_TRANSITIONS=168} [2024-11-28 03:45:39,574 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-11-28 03:45:39,574 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 168 transitions, 2181 flow [2024-11-28 03:45:39,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 03:45:39,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:39,575 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:39,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:45:39,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:39,775 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:39,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1404198808, now seen corresponding path program 8 times [2024-11-28 03:45:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:39,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129373700] [2024-11-28 03:45:39,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:39,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:39,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129373700] [2024-11-28 03:45:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129373700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050573085] [2024-11-28 03:45:39,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:39,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:39,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:39,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:45:40,118 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:40,119 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:40,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:45:40,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:40,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:45:40,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050573085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:40,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:40,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:45:40,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622964865] [2024-11-28 03:45:40,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:40,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:45:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:40,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:45:40,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:45:40,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:40,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 2181 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 03:45:40,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:40,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:40,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:40,789 INFO L124 PetriNetUnfolderBase]: 422/874 cut-off events. [2024-11-28 03:45:40,790 INFO L125 PetriNetUnfolderBase]: For 5622/5622 co-relation queries the response was YES. [2024-11-28 03:45:40,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5483 conditions, 874 events. 422/874 cut-off events. For 5622/5622 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4826 event pairs, 66 based on Foata normal form. 6/880 useless extension candidates. Maximal degree in co-relation 5376. Up to 372 conditions per place. [2024-11-28 03:45:40,799 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 117 selfloop transitions, 93 changer transitions 0/211 dead transitions. [2024-11-28 03:45:40,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 3000 flow [2024-11-28 03:45:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:45:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:45:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-11-28 03:45:40,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-11-28 03:45:40,801 INFO L175 Difference]: Start difference. First operand has 160 places, 168 transitions, 2181 flow. Second operand 10 states and 88 transitions. [2024-11-28 03:45:40,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 3000 flow [2024-11-28 03:45:40,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 2894 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-11-28 03:45:40,840 INFO L231 Difference]: Finished difference. Result has 160 places, 182 transitions, 2576 flow [2024-11-28 03:45:40,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2576, PETRI_PLACES=160, PETRI_TRANSITIONS=182} [2024-11-28 03:45:40,843 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-11-28 03:45:40,843 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 182 transitions, 2576 flow [2024-11-28 03:45:40,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 03:45:40,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:40,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:40,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:45:41,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:45:41,048 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:41,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1035865759, now seen corresponding path program 9 times [2024-11-28 03:45:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:41,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756454639] [2024-11-28 03:45:41,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:41,069 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:41,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756454639] [2024-11-28 03:45:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756454639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516404661] [2024-11-28 03:45:41,248 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:41,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:41,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:45:41,410 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:41,410 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:41,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:45:41,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:41,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:41,669 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 115 treesize of output 109 [2024-11-28 03:45:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:41,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:42,311 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-11-28 03:45:42,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2024-11-28 03:45:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516404661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:42,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:42,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-28 03:45:42,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733324305] [2024-11-28 03:45:42,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:42,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:45:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:42,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:45:42,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:45:42,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:42,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 182 transitions, 2576 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:42,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:42,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:42,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:45,994 INFO L124 PetriNetUnfolderBase]: 569/1168 cut-off events. [2024-11-28 03:45:45,995 INFO L125 PetriNetUnfolderBase]: For 9525/9525 co-relation queries the response was YES. [2024-11-28 03:45:46,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7840 conditions, 1168 events. 569/1168 cut-off events. For 9525/9525 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6827 event pairs, 10 based on Foata normal form. 5/1173 useless extension candidates. Maximal degree in co-relation 7733. Up to 346 conditions per place. [2024-11-28 03:45:46,008 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 167 selfloop transitions, 157 changer transitions 12/337 dead transitions. [2024-11-28 03:45:46,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 337 transitions, 4794 flow [2024-11-28 03:45:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:45:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:45:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 235 transitions. [2024-11-28 03:45:46,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-11-28 03:45:46,012 INFO L175 Difference]: Start difference. First operand has 160 places, 182 transitions, 2576 flow. Second operand 27 states and 235 transitions. [2024-11-28 03:45:46,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 337 transitions, 4794 flow [2024-11-28 03:45:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 337 transitions, 4588 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-11-28 03:45:46,072 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3730 flow [2024-11-28 03:45:46,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3730, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-11-28 03:45:46,073 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2024-11-28 03:45:46,073 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3730 flow [2024-11-28 03:45:46,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:46,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:46,074 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:46,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:45:46,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:45:46,274 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:46,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash 880345941, now seen corresponding path program 10 times [2024-11-28 03:45:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247058677] [2024-11-28 03:45:46,275 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:46,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:46,302 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:46,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:46,869 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 03:45:46,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247058677] [2024-11-28 03:45:46,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247058677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515432539] [2024-11-28 03:45:46,870 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:46,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:46,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:46,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:46,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:45:46,960 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:46,961 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:46,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:45:46,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:47,304 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:45:47,305 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-11-28 03:45:47,332 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 03:45:47,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:47,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:47,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 65 [2024-11-28 03:45:47,957 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 03:45:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515432539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:47,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:47,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-28 03:45:47,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066154014] [2024-11-28 03:45:47,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:47,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:45:47,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:47,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:45:47,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:45:47,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:47,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3730 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:47,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:47,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:47,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:48,646 INFO L124 PetriNetUnfolderBase]: 569/1158 cut-off events. [2024-11-28 03:45:48,646 INFO L125 PetriNetUnfolderBase]: For 12235/12235 co-relation queries the response was YES. [2024-11-28 03:45:48,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8543 conditions, 1158 events. 569/1158 cut-off events. For 12235/12235 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6688 event pairs, 35 based on Foata normal form. 5/1163 useless extension candidates. Maximal degree in co-relation 8413. Up to 986 conditions per place. [2024-11-28 03:45:48,657 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 209 selfloop transitions, 22 changer transitions 28/260 dead transitions. [2024-11-28 03:45:48,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 260 transitions, 4349 flow [2024-11-28 03:45:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:45:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:45:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2024-11-28 03:45:48,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-11-28 03:45:48,659 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3730 flow. Second operand 15 states and 108 transitions. [2024-11-28 03:45:48,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 260 transitions, 4349 flow [2024-11-28 03:45:48,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 4094 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-11-28 03:45:48,721 INFO L231 Difference]: Finished difference. Result has 193 places, 221 transitions, 3303 flow [2024-11-28 03:45:48,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3303, PETRI_PLACES=193, PETRI_TRANSITIONS=221} [2024-11-28 03:45:48,722 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2024-11-28 03:45:48,722 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 221 transitions, 3303 flow [2024-11-28 03:45:48,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:48,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:48,722 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:48,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:45:48,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:45:48,923 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:48,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 610722135, now seen corresponding path program 11 times [2024-11-28 03:45:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:48,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013018195] [2024-11-28 03:45:48,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:48,941 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:48,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013018195] [2024-11-28 03:45:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013018195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709500119] [2024-11-28 03:45:49,144 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:49,147 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:49,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:45:49,253 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:49,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:49,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:45:49,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:49,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:45:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:49,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:50,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:45:50,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 68 [2024-11-28 03:45:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709500119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:50,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:50,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-28 03:45:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834637587] [2024-11-28 03:45:50,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:50,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:45:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:50,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:45:50,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:45:50,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:50,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 221 transitions, 3303 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:50,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:50,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:50,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:52,234 INFO L124 PetriNetUnfolderBase]: 542/1076 cut-off events. [2024-11-28 03:45:52,234 INFO L125 PetriNetUnfolderBase]: For 10432/10432 co-relation queries the response was YES. [2024-11-28 03:45:52,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 1076 events. 542/1076 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5965 event pairs, 13 based on Foata normal form. 4/1080 useless extension candidates. Maximal degree in co-relation 7545. Up to 556 conditions per place. [2024-11-28 03:45:52,243 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 182 selfloop transitions, 89 changer transitions 3/275 dead transitions. [2024-11-28 03:45:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 275 transitions, 4270 flow [2024-11-28 03:45:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:45:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:45:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2024-11-28 03:45:52,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-11-28 03:45:52,244 INFO L175 Difference]: Start difference. First operand has 193 places, 221 transitions, 3303 flow. Second operand 16 states and 147 transitions. [2024-11-28 03:45:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 275 transitions, 4270 flow [2024-11-28 03:45:52,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 275 transitions, 4180 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-11-28 03:45:52,311 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 3392 flow [2024-11-28 03:45:52,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3392, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-11-28 03:45:52,311 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2024-11-28 03:45:52,311 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 3392 flow [2024-11-28 03:45:52,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:52,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:52,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:52,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:45:52,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:52,512 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:52,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1372811054, now seen corresponding path program 2 times [2024-11-28 03:45:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:52,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132952000] [2024-11-28 03:45:52,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:52,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:52,533 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:52,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:52,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132952000] [2024-11-28 03:45:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132952000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052390669] [2024-11-28 03:45:52,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:52,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:52,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:45:52,807 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:52,807 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:52,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:45:52,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:52,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052390669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:52,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:52,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-28 03:45:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904837823] [2024-11-28 03:45:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:52,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:45:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:52,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:45:52,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:45:52,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:52,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 3392 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 03:45:52,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:52,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:52,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:53,758 INFO L124 PetriNetUnfolderBase]: 546/1082 cut-off events. [2024-11-28 03:45:53,758 INFO L125 PetriNetUnfolderBase]: For 11153/11153 co-relation queries the response was YES. [2024-11-28 03:45:53,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7801 conditions, 1082 events. 546/1082 cut-off events. For 11153/11153 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6047 event pairs, 72 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 7701. Up to 342 conditions per place. [2024-11-28 03:45:53,771 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 163 selfloop transitions, 124 changer transitions 0/288 dead transitions. [2024-11-28 03:45:53,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 288 transitions, 4564 flow [2024-11-28 03:45:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:45:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 03:45:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 149 transitions. [2024-11-28 03:45:53,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43823529411764706 [2024-11-28 03:45:53,773 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 3392 flow. Second operand 17 states and 149 transitions. [2024-11-28 03:45:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 288 transitions, 4564 flow [2024-11-28 03:45:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 288 transitions, 4351 flow, removed 20 selfloop flow, removed 13 redundant places. [2024-11-28 03:45:53,844 INFO L231 Difference]: Finished difference. Result has 189 places, 232 transitions, 3708 flow [2024-11-28 03:45:53,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3708, PETRI_PLACES=189, PETRI_TRANSITIONS=232} [2024-11-28 03:45:53,845 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-11-28 03:45:53,845 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 232 transitions, 3708 flow [2024-11-28 03:45:53,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 03:45:53,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:53,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:53,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:45:54,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:54,046 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:54,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash 863466532, now seen corresponding path program 3 times [2024-11-28 03:45:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:54,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948545079] [2024-11-28 03:45:54,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:54,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:54,066 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:54,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948545079] [2024-11-28 03:45:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948545079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027914055] [2024-11-28 03:45:54,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:45:54,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:54,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:54,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:45:54,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:45:54,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:54,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:45:54,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:54,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:54,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027914055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:54,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 03:45:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519726580] [2024-11-28 03:45:54,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:54,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:45:54,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:54,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:45:54,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:45:54,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:54,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 232 transitions, 3708 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 03:45:54,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:54,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:54,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:57,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:45:58,318 INFO L124 PetriNetUnfolderBase]: 663/1321 cut-off events. [2024-11-28 03:45:58,318 INFO L125 PetriNetUnfolderBase]: For 15407/15407 co-relation queries the response was YES. [2024-11-28 03:45:58,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9702 conditions, 1321 events. 663/1321 cut-off events. For 15407/15407 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7748 event pairs, 94 based on Foata normal form. 27/1348 useless extension candidates. Maximal degree in co-relation 9600. Up to 602 conditions per place. [2024-11-28 03:45:58,328 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 165 selfloop transitions, 162 changer transitions 0/328 dead transitions. [2024-11-28 03:45:58,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 328 transitions, 5507 flow [2024-11-28 03:45:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:45:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:45:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 152 transitions. [2024-11-28 03:45:58,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-11-28 03:45:58,330 INFO L175 Difference]: Start difference. First operand has 189 places, 232 transitions, 3708 flow. Second operand 18 states and 152 transitions. [2024-11-28 03:45:58,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 328 transitions, 5507 flow [2024-11-28 03:45:58,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 328 transitions, 5292 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-11-28 03:45:58,409 INFO L231 Difference]: Finished difference. Result has 205 places, 279 transitions, 4904 flow [2024-11-28 03:45:58,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4904, PETRI_PLACES=205, PETRI_TRANSITIONS=279} [2024-11-28 03:45:58,410 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2024-11-28 03:45:58,410 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 279 transitions, 4904 flow [2024-11-28 03:45:58,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 03:45:58,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:45:58,410 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:58,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:45:58,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:58,611 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:45:58,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash 67779446, now seen corresponding path program 4 times [2024-11-28 03:45:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048099304] [2024-11-28 03:45:58,611 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:58,628 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:58,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048099304] [2024-11-28 03:45:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048099304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870472075] [2024-11-28 03:45:58,754 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:45:58,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:58,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:58,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:58,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:45:58,885 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:45:58,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:58,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:45:58,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:58,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:45:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870472075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:59,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:59,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-28 03:45:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262577613] [2024-11-28 03:45:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:59,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:45:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:59,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:45:59,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:45:59,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:45:59,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 279 transitions, 4904 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 03:45:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:45:59,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:45:59,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:45:59,877 INFO L124 PetriNetUnfolderBase]: 840/1685 cut-off events. [2024-11-28 03:45:59,877 INFO L125 PetriNetUnfolderBase]: For 22056/22056 co-relation queries the response was YES. [2024-11-28 03:45:59,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13161 conditions, 1685 events. 840/1685 cut-off events. For 22056/22056 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10469 event pairs, 24 based on Foata normal form. 6/1691 useless extension candidates. Maximal degree in co-relation 13054. Up to 542 conditions per place. [2024-11-28 03:45:59,890 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 205 selfloop transitions, 190 changer transitions 0/396 dead transitions. [2024-11-28 03:45:59,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 396 transitions, 7346 flow [2024-11-28 03:45:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:45:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:45:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2024-11-28 03:45:59,892 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-11-28 03:45:59,892 INFO L175 Difference]: Start difference. First operand has 205 places, 279 transitions, 4904 flow. Second operand 16 states and 147 transitions. [2024-11-28 03:45:59,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 396 transitions, 7346 flow [2024-11-28 03:46:00,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 396 transitions, 7035 flow, removed 112 selfloop flow, removed 6 redundant places. [2024-11-28 03:46:00,052 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 6089 flow [2024-11-28 03:46:00,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6089, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2024-11-28 03:46:00,053 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2024-11-28 03:46:00,053 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 6089 flow [2024-11-28 03:46:00,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 03:46:00,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:46:00,053 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:00,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:46:00,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 03:46:00,254 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:46:00,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash 68374092, now seen corresponding path program 5 times [2024-11-28 03:46:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:00,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593759995] [2024-11-28 03:46:00,255 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:46:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:00,272 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:00,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:00,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593759995] [2024-11-28 03:46:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593759995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775029659] [2024-11-28 03:46:00,433 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:46:00,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:00,435 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:00,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:46:00,686 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:00,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:00,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:46:00,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:00,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775029659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:00,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:46:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854332970] [2024-11-28 03:46:00,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:00,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:46:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:46:00,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:46:00,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:46:00,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:46:00,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 6089 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 03:46:00,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:46:00,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:46:00,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:46:02,068 INFO L124 PetriNetUnfolderBase]: 944/1885 cut-off events. [2024-11-28 03:46:02,068 INFO L125 PetriNetUnfolderBase]: For 29372/29372 co-relation queries the response was YES. [2024-11-28 03:46:02,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15394 conditions, 1885 events. 944/1885 cut-off events. For 29372/29372 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11858 event pairs, 46 based on Foata normal form. 12/1897 useless extension candidates. Maximal degree in co-relation 15282. Up to 601 conditions per place. [2024-11-28 03:46:02,083 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 211 selfloop transitions, 239 changer transitions 0/451 dead transitions. [2024-11-28 03:46:02,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 451 transitions, 8573 flow [2024-11-28 03:46:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:46:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:46:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 168 transitions. [2024-11-28 03:46:02,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-28 03:46:02,085 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 6089 flow. Second operand 18 states and 168 transitions. [2024-11-28 03:46:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 451 transitions, 8573 flow [2024-11-28 03:46:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 451 transitions, 7952 flow, removed 254 selfloop flow, removed 5 redundant places. [2024-11-28 03:46:02,289 INFO L231 Difference]: Finished difference. Result has 237 places, 366 transitions, 6909 flow [2024-11-28 03:46:02,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6909, PETRI_PLACES=237, PETRI_TRANSITIONS=366} [2024-11-28 03:46:02,290 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2024-11-28 03:46:02,290 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 366 transitions, 6909 flow [2024-11-28 03:46:02,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 03:46:02,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:46:02,290 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:02,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:46:02,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:46:02,495 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:46:02,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -10274148, now seen corresponding path program 6 times [2024-11-28 03:46:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:02,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63242611] [2024-11-28 03:46:02,495 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:46:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:02,513 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:46:02,513 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63242611] [2024-11-28 03:46:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63242611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765431450] [2024-11-28 03:46:02,739 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:46:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:02,741 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:02,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:46:02,996 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:46:02,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:02,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:46:02,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:03,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:46:03,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765431450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:03,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:03,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:46:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465122899] [2024-11-28 03:46:03,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:03,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:46:03,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:46:03,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:46:03,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:46:03,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:46:03,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 366 transitions, 6909 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:03,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:46:03,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:46:03,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:46:04,651 INFO L124 PetriNetUnfolderBase]: 933/1858 cut-off events. [2024-11-28 03:46:04,651 INFO L125 PetriNetUnfolderBase]: For 31500/31500 co-relation queries the response was YES. [2024-11-28 03:46:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 1858 events. 933/1858 cut-off events. For 31500/31500 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11606 event pairs, 46 based on Foata normal form. 15/1873 useless extension candidates. Maximal degree in co-relation 15176. Up to 589 conditions per place. [2024-11-28 03:46:04,665 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 206 selfloop transitions, 234 changer transitions 0/441 dead transitions. [2024-11-28 03:46:04,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 441 transitions, 8615 flow [2024-11-28 03:46:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:46:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:46:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2024-11-28 03:46:04,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42894736842105263 [2024-11-28 03:46:04,666 INFO L175 Difference]: Start difference. First operand has 237 places, 366 transitions, 6909 flow. Second operand 19 states and 163 transitions. [2024-11-28 03:46:04,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 441 transitions, 8615 flow [2024-11-28 03:46:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 441 transitions, 8413 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-11-28 03:46:04,818 INFO L231 Difference]: Finished difference. Result has 252 places, 368 transitions, 7252 flow [2024-11-28 03:46:04,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7252, PETRI_PLACES=252, PETRI_TRANSITIONS=368} [2024-11-28 03:46:04,819 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2024-11-28 03:46:04,819 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 368 transitions, 7252 flow [2024-11-28 03:46:04,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:04,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:46:04,819 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:04,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:46:05,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:46:05,020 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:46:05,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -872842226, now seen corresponding path program 12 times [2024-11-28 03:46:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119295653] [2024-11-28 03:46:05,020 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:46:05,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:05,042 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:46:05,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:46:05,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:05,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119295653] [2024-11-28 03:46:05,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119295653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:05,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867239234] [2024-11-28 03:46:05,229 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:46:05,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:05,231 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:05,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:46:05,334 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:46:05,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:05,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 03:46:05,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:05,385 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 03:46:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:05,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:09,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 109 [2024-11-28 03:46:09,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:46:09,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 258 treesize of output 298 [2024-11-28 03:48:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:48:14,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867239234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:14,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:14,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-28 03:48:14,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922042081] [2024-11-28 03:48:14,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:14,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:48:14,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:14,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:48:14,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:48:14,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:48:14,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 368 transitions, 7252 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 03:48:14,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:48:14,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:48:14,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:48:16,806 INFO L124 PetriNetUnfolderBase]: 943/1894 cut-off events. [2024-11-28 03:48:16,807 INFO L125 PetriNetUnfolderBase]: For 34652/34652 co-relation queries the response was YES. [2024-11-28 03:48:16,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16151 conditions, 1894 events. 943/1894 cut-off events. For 34652/34652 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11976 event pairs, 3 based on Foata normal form. 7/1901 useless extension candidates. Maximal degree in co-relation 16000. Up to 1053 conditions per place. [2024-11-28 03:48:16,828 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 215 selfloop transitions, 179 changer transitions 39/434 dead transitions. [2024-11-28 03:48:16,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 434 transitions, 8499 flow [2024-11-28 03:48:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:48:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 03:48:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 195 transitions. [2024-11-28 03:48:16,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-28 03:48:16,830 INFO L175 Difference]: Start difference. First operand has 252 places, 368 transitions, 7252 flow. Second operand 26 states and 195 transitions. [2024-11-28 03:48:16,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 434 transitions, 8499 flow [2024-11-28 03:48:17,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 434 transitions, 8158 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-11-28 03:48:17,036 INFO L231 Difference]: Finished difference. Result has 273 places, 357 transitions, 7153 flow [2024-11-28 03:48:17,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7153, PETRI_PLACES=273, PETRI_TRANSITIONS=357} [2024-11-28 03:48:17,037 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2024-11-28 03:48:17,037 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 357 transitions, 7153 flow [2024-11-28 03:48:17,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 03:48:17,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:48:17,037 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:48:17,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:48:17,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:48:17,238 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:48:17,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:48:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1681686941, now seen corresponding path program 1 times [2024-11-28 03:48:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:48:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959552574] [2024-11-28 03:48:17,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:48:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:48:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:48:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959552574] [2024-11-28 03:48:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959552574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:48:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723104191] [2024-11-28 03:48:17,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:48:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:48:17,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:48:17,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:48:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:17,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:48:17,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:48:17,607 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 03:48:17,631 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 03:48:18,014 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 03:48:18,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:20,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723104191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:20,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:20,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-11-28 03:48:20,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312279350] [2024-11-28 03:48:20,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:20,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:48:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:20,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:48:20,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:48:20,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:48:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 357 transitions, 7153 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 03:48:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:48:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:48:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:48:38,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:48:40,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:48:41,004 INFO L124 PetriNetUnfolderBase]: 1159/2242 cut-off events. [2024-11-28 03:48:41,004 INFO L125 PetriNetUnfolderBase]: For 44200/44200 co-relation queries the response was YES. [2024-11-28 03:48:41,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19944 conditions, 2242 events. 1159/2242 cut-off events. For 44200/44200 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14245 event pairs, 13 based on Foata normal form. 10/2252 useless extension candidates. Maximal degree in co-relation 19766. Up to 670 conditions per place. [2024-11-28 03:48:41,023 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 249 selfloop transitions, 350 changer transitions 11/611 dead transitions. [2024-11-28 03:48:41,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 611 transitions, 11951 flow [2024-11-28 03:48:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:48:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-28 03:48:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 342 transitions. [2024-11-28 03:48:41,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-11-28 03:48:41,025 INFO L175 Difference]: Start difference. First operand has 273 places, 357 transitions, 7153 flow. Second operand 42 states and 342 transitions. [2024-11-28 03:48:41,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 611 transitions, 11951 flow [2024-11-28 03:48:41,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 611 transitions, 11027 flow, removed 51 selfloop flow, removed 23 redundant places. [2024-11-28 03:48:41,231 INFO L231 Difference]: Finished difference. Result has 283 places, 476 transitions, 9845 flow [2024-11-28 03:48:41,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9845, PETRI_PLACES=283, PETRI_TRANSITIONS=476} [2024-11-28 03:48:41,232 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2024-11-28 03:48:41,232 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 476 transitions, 9845 flow [2024-11-28 03:48:41,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 03:48:41,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:48:41,232 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:48:41,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 03:48:41,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:48:41,433 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:48:41,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:48:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash 553862092, now seen corresponding path program 7 times [2024-11-28 03:48:41,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:48:41,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814037721] [2024-11-28 03:48:41,433 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:48:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:48:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:41,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:48:41,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814037721] [2024-11-28 03:48:41,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814037721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:48:41,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030758751] [2024-11-28 03:48:41,595 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:48:41,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:48:41,598 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:48:41,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:48:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:41,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:48:41,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:48:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:41,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030758751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:41,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:41,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 03:48:41,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433958162] [2024-11-28 03:48:41,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:41,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:48:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:41,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:48:41,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:48:41,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:48:41,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 476 transitions, 9845 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:48:41,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:48:41,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:48:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:48:43,210 INFO L124 PetriNetUnfolderBase]: 1151/2227 cut-off events. [2024-11-28 03:48:43,210 INFO L125 PetriNetUnfolderBase]: For 43925/43925 co-relation queries the response was YES. [2024-11-28 03:48:43,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19956 conditions, 2227 events. 1151/2227 cut-off events. For 43925/43925 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14213 event pairs, 153 based on Foata normal form. 12/2239 useless extension candidates. Maximal degree in co-relation 19766. Up to 715 conditions per place. [2024-11-28 03:48:43,229 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 313 selfloop transitions, 241 changer transitions 0/555 dead transitions. [2024-11-28 03:48:43,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 555 transitions, 11754 flow [2024-11-28 03:48:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:48:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:48:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2024-11-28 03:48:43,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-11-28 03:48:43,230 INFO L175 Difference]: Start difference. First operand has 283 places, 476 transitions, 9845 flow. Second operand 20 states and 158 transitions. [2024-11-28 03:48:43,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 555 transitions, 11754 flow [2024-11-28 03:48:43,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 555 transitions, 11055 flow, removed 251 selfloop flow, removed 11 redundant places. [2024-11-28 03:48:43,570 INFO L231 Difference]: Finished difference. Result has 293 places, 484 transitions, 9844 flow [2024-11-28 03:48:43,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9210, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9844, PETRI_PLACES=293, PETRI_TRANSITIONS=484} [2024-11-28 03:48:43,571 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2024-11-28 03:48:43,571 INFO L471 AbstractCegarLoop]: Abstraction has has 293 places, 484 transitions, 9844 flow [2024-11-28 03:48:43,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:48:43,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:48:43,571 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:48:43,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:48:43,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:48:43,772 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:48:43,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:48:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 439000624, now seen corresponding path program 13 times [2024-11-28 03:48:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:48:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116676656] [2024-11-28 03:48:43,772 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:48:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:48:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:44,936 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 03:48:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:48:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116676656] [2024-11-28 03:48:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116676656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:48:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187961073] [2024-11-28 03:48:44,937 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:48:44,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:44,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:48:44,939 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:48:44,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:48:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:48:45,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:48:45,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:48:45,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:48:45,486 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 45 [2024-11-28 03:48:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:48:45,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:46,328 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-28 03:48:46,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 103 [2024-11-28 03:48:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:46,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187961073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:46,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:46,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2024-11-28 03:48:46,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602493982] [2024-11-28 03:48:46,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:46,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:48:46,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:46,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:48:46,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:48:46,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:48:46,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 484 transitions, 9844 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 03:48:46,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:48:46,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:48:46,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:48:51,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:48:52,291 INFO L124 PetriNetUnfolderBase]: 1228/2431 cut-off events. [2024-11-28 03:48:52,291 INFO L125 PetriNetUnfolderBase]: For 36937/36937 co-relation queries the response was YES. [2024-11-28 03:48:52,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20207 conditions, 2431 events. 1228/2431 cut-off events. For 36937/36937 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 16218 event pairs, 23 based on Foata normal form. 1/2432 useless extension candidates. Maximal degree in co-relation 20021. Up to 1293 conditions per place. [2024-11-28 03:48:52,309 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 358 selfloop transitions, 236 changer transitions 2/597 dead transitions. [2024-11-28 03:48:52,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 597 transitions, 12179 flow [2024-11-28 03:48:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:48:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:48:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 242 transitions. [2024-11-28 03:48:52,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-11-28 03:48:52,310 INFO L175 Difference]: Start difference. First operand has 293 places, 484 transitions, 9844 flow. Second operand 30 states and 242 transitions. [2024-11-28 03:48:52,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 597 transitions, 12179 flow [2024-11-28 03:48:52,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 597 transitions, 11864 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-11-28 03:48:52,560 INFO L231 Difference]: Finished difference. Result has 323 places, 533 transitions, 11184 flow [2024-11-28 03:48:52,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11184, PETRI_PLACES=323, PETRI_TRANSITIONS=533} [2024-11-28 03:48:52,561 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2024-11-28 03:48:52,561 INFO L471 AbstractCegarLoop]: Abstraction has has 323 places, 533 transitions, 11184 flow [2024-11-28 03:48:52,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 03:48:52,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:48:52,561 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:48:52,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:48:52,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:48:52,761 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:48:52,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:48:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1928405620, now seen corresponding path program 14 times [2024-11-28 03:48:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:48:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181123969] [2024-11-28 03:48:52,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:48:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:48:52,787 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:48:52,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:48:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:48:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181123969] [2024-11-28 03:48:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181123969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:48:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518198615] [2024-11-28 03:48:53,125 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:48:53,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:53,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:48:53,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:48:53,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:48:53,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:48:53,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:48:53,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:48:53,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:48:53,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:48:53,539 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-11-28 03:48:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:48:53,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:54,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:48:54,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 145 [2024-11-28 03:48:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:48:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518198615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:55,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 17 [2024-11-28 03:48:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417960429] [2024-11-28 03:48:55,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:55,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:48:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:55,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:48:55,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:48:55,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:48:55,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 533 transitions, 11184 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 03:48:55,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:48:55,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:48:55,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:49:01,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:49:05,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:49:05,661 INFO L124 PetriNetUnfolderBase]: 1290/2562 cut-off events. [2024-11-28 03:49:05,661 INFO L125 PetriNetUnfolderBase]: For 43213/43213 co-relation queries the response was YES. [2024-11-28 03:49:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22132 conditions, 2562 events. 1290/2562 cut-off events. For 43213/43213 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17393 event pairs, 11 based on Foata normal form. 5/2567 useless extension candidates. Maximal degree in co-relation 21963. Up to 1206 conditions per place. [2024-11-28 03:49:05,681 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 310 selfloop transitions, 290 changer transitions 16/617 dead transitions. [2024-11-28 03:49:05,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 617 transitions, 13423 flow [2024-11-28 03:49:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:49:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:49:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 178 transitions. [2024-11-28 03:49:05,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3869565217391304 [2024-11-28 03:49:05,682 INFO L175 Difference]: Start difference. First operand has 323 places, 533 transitions, 11184 flow. Second operand 23 states and 178 transitions. [2024-11-28 03:49:05,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 617 transitions, 13423 flow [2024-11-28 03:49:05,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 617 transitions, 13084 flow, removed 40 selfloop flow, removed 19 redundant places. [2024-11-28 03:49:05,976 INFO L231 Difference]: Finished difference. Result has 333 places, 554 transitions, 12351 flow [2024-11-28 03:49:05,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12351, PETRI_PLACES=333, PETRI_TRANSITIONS=554} [2024-11-28 03:49:05,978 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2024-11-28 03:49:05,978 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 554 transitions, 12351 flow [2024-11-28 03:49:05,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 03:49:05,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:49:05,978 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 03:49:06,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:49:06,178 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:49:06,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1433097967, now seen corresponding path program 2 times [2024-11-28 03:49:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:49:06,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947553028] [2024-11-28 03:49:06,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:49:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:49:06,200 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:49:06,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:06,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:49:06,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947553028] [2024-11-28 03:49:06,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947553028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:06,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462212286] [2024-11-28 03:49:06,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:49:06,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:06,471 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:06,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:49:06,613 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:49:06,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:06,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 03:49:06,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:06,673 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 03:49:06,710 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 03:49:07,573 INFO L349 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2024-11-28 03:49:07,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 92 [2024-11-28 03:49:07,816 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 03:49:07,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:28,789 WARN L286 SmtUtils]: Spent 19.35s on a formula simplification. DAG size of input: 37 DAG size of output: 25 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-11-28 03:49:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462212286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:36,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:49:36,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-11-28 03:49:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925580108] [2024-11-28 03:49:36,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:36,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:49:36,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:49:36,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:49:36,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:49:36,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:49:36,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 554 transitions, 12351 flow. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 03:49:36,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:49:36,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:49:36,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:49:51,086 INFO L124 PetriNetUnfolderBase]: 1418/2783 cut-off events. [2024-11-28 03:49:51,087 INFO L125 PetriNetUnfolderBase]: For 56508/56508 co-relation queries the response was YES. [2024-11-28 03:49:51,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25212 conditions, 2783 events. 1418/2783 cut-off events. For 56508/56508 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 19017 event pairs, 15 based on Foata normal form. 9/2792 useless extension candidates. Maximal degree in co-relation 25112. Up to 1057 conditions per place. [2024-11-28 03:49:51,112 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 340 selfloop transitions, 386 changer transitions 3/730 dead transitions. [2024-11-28 03:49:51,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 730 transitions, 15851 flow [2024-11-28 03:49:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 03:49:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-28 03:49:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 387 transitions. [2024-11-28 03:49:51,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3948979591836735 [2024-11-28 03:49:51,113 INFO L175 Difference]: Start difference. First operand has 333 places, 554 transitions, 12351 flow. Second operand 49 states and 387 transitions. [2024-11-28 03:49:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 730 transitions, 15851 flow [2024-11-28 03:49:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 730 transitions, 15396 flow, removed 54 selfloop flow, removed 20 redundant places. [2024-11-28 03:49:51,595 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 14831 flow [2024-11-28 03:49:51,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11931, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14831, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-11-28 03:49:51,596 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2024-11-28 03:49:51,597 INFO L471 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 14831 flow [2024-11-28 03:49:51,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 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 03:49:51,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:49:51,597 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:51,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:49:51,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:51,797 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:49:51,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:51,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2088882252, now seen corresponding path program 8 times [2024-11-28 03:49:51,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:49:51,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823956437] [2024-11-28 03:49:51,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:49:51,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:49:51,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:49:51,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:49:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823956437] [2024-11-28 03:49:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823956437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030841370] [2024-11-28 03:49:52,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:49:52,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:52,028 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:52,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:49:52,222 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:49:52,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:52,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:49:52,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:52,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:52,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030841370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:52,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:49:52,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 03:49:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824220791] [2024-11-28 03:49:52,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:52,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:49:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:49:52,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:49:52,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:49:52,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:49:52,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 14831 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 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 03:49:52,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:49:52,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:49:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:49:55,476 INFO L124 PetriNetUnfolderBase]: 1596/3123 cut-off events. [2024-11-28 03:49:55,476 INFO L125 PetriNetUnfolderBase]: For 75747/75747 co-relation queries the response was YES. [2024-11-28 03:49:55,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30191 conditions, 3123 events. 1596/3123 cut-off events. For 75747/75747 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21658 event pairs, 285 based on Foata normal form. 16/3139 useless extension candidates. Maximal degree in co-relation 30083. Up to 1502 conditions per place. [2024-11-28 03:49:55,504 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 496 selfloop transitions, 269 changer transitions 0/766 dead transitions. [2024-11-28 03:49:55,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 766 transitions, 18830 flow [2024-11-28 03:49:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:49:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 03:49:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 195 transitions. [2024-11-28 03:49:55,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-28 03:49:55,506 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 14831 flow. Second operand 21 states and 195 transitions. [2024-11-28 03:49:55,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 766 transitions, 18830 flow [2024-11-28 03:49:56,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 766 transitions, 17786 flow, removed 310 selfloop flow, removed 27 redundant places. [2024-11-28 03:49:56,094 INFO L231 Difference]: Finished difference. Result has 366 places, 701 transitions, 16451 flow [2024-11-28 03:49:56,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13992, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16451, PETRI_PLACES=366, PETRI_TRANSITIONS=701} [2024-11-28 03:49:56,095 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 345 predicate places. [2024-11-28 03:49:56,095 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 701 transitions, 16451 flow [2024-11-28 03:49:56,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 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 03:49:56,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:49:56,095 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:56,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:49:56,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 03:49:56,300 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:49:56,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2010234012, now seen corresponding path program 9 times [2024-11-28 03:49:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:49:56,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033195825] [2024-11-28 03:49:56,300 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:49:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:49:56,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:49:56,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:49:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033195825] [2024-11-28 03:49:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033195825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477473706] [2024-11-28 03:49:56,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:49:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:56,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:56,485 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:56,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:49:56,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:49:56,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:56,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:49:56,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:56,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:49:56,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477473706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:56,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:49:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 03:49:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109104005] [2024-11-28 03:49:56,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:56,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:49:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:49:56,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:49:56,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:49:56,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:49:56,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 701 transitions, 16451 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:49:56,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:49:56,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:49:56,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:49:59,546 INFO L124 PetriNetUnfolderBase]: 1575/3106 cut-off events. [2024-11-28 03:49:59,546 INFO L125 PetriNetUnfolderBase]: For 72370/72370 co-relation queries the response was YES. [2024-11-28 03:49:59,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29647 conditions, 3106 events. 1575/3106 cut-off events. For 72370/72370 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21772 event pairs, 284 based on Foata normal form. 36/3142 useless extension candidates. Maximal degree in co-relation 29539. Up to 1504 conditions per place. [2024-11-28 03:49:59,583 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 499 selfloop transitions, 279 changer transitions 0/779 dead transitions. [2024-11-28 03:49:59,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 779 transitions, 18605 flow [2024-11-28 03:49:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:49:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:49:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 241 transitions. [2024-11-28 03:49:59,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4303571428571429 [2024-11-28 03:49:59,585 INFO L175 Difference]: Start difference. First operand has 366 places, 701 transitions, 16451 flow. Second operand 28 states and 241 transitions. [2024-11-28 03:49:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 779 transitions, 18605 flow [2024-11-28 03:50:00,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 779 transitions, 18177 flow, removed 145 selfloop flow, removed 5 redundant places. [2024-11-28 03:50:00,331 INFO L231 Difference]: Finished difference. Result has 393 places, 704 transitions, 16813 flow [2024-11-28 03:50:00,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=15842, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16813, PETRI_PLACES=393, PETRI_TRANSITIONS=704} [2024-11-28 03:50:00,332 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2024-11-28 03:50:00,332 INFO L471 AbstractCegarLoop]: Abstraction has has 393 places, 704 transitions, 16813 flow [2024-11-28 03:50:00,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:00,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:50:00,332 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:00,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:50:00,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 03:50:00,533 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:50:00,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash 144240886, now seen corresponding path program 10 times [2024-11-28 03:50:00,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:50:00,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204500519] [2024-11-28 03:50:00,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:50:00,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:50:00,553 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:50:00,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:50:00,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:50:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204500519] [2024-11-28 03:50:00,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204500519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:50:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657906566] [2024-11-28 03:50:00,748 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:50:00,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:00,750 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:00,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:50:00,886 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:50:00,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:00,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:50:00,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:50:00,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:50:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657906566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:01,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:50:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 03:50:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503964586] [2024-11-28 03:50:01,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:01,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:50:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:50:01,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:50:01,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:50:01,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:50:01,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 704 transitions, 16813 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:01,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:50:01,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:50:01,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:50:06,943 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 [] [2024-11-28 03:50:08,599 INFO L124 PetriNetUnfolderBase]: 1587/3133 cut-off events. [2024-11-28 03:50:08,599 INFO L125 PetriNetUnfolderBase]: For 71342/71342 co-relation queries the response was YES. [2024-11-28 03:50:08,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30048 conditions, 3133 events. 1587/3133 cut-off events. For 71342/71342 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21971 event pairs, 216 based on Foata normal form. 24/3157 useless extension candidates. Maximal degree in co-relation 29935. Up to 1208 conditions per place. [2024-11-28 03:50:08,634 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 417 selfloop transitions, 350 changer transitions 1/769 dead transitions. [2024-11-28 03:50:08,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 769 transitions, 19008 flow [2024-11-28 03:50:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:50:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:50:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 152 transitions. [2024-11-28 03:50:08,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-28 03:50:08,637 INFO L175 Difference]: Start difference. First operand has 393 places, 704 transitions, 16813 flow. Second operand 20 states and 152 transitions. [2024-11-28 03:50:08,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 769 transitions, 19008 flow [2024-11-28 03:50:09,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 769 transitions, 18709 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-11-28 03:50:09,594 INFO L231 Difference]: Finished difference. Result has 405 places, 713 transitions, 17398 flow [2024-11-28 03:50:09,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16495, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17398, PETRI_PLACES=405, PETRI_TRANSITIONS=713} [2024-11-28 03:50:09,595 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 384 predicate places. [2024-11-28 03:50:09,595 INFO L471 AbstractCegarLoop]: Abstraction has has 405 places, 713 transitions, 17398 flow [2024-11-28 03:50:09,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:09,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:50:09,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:09,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 03:50:09,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:09,796 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:50:09,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1693274121, now seen corresponding path program 3 times [2024-11-28 03:50:09,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:50:09,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308607846] [2024-11-28 03:50:09,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:50:09,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:50:09,817 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:50:09,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:50:10,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:50:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308607846] [2024-11-28 03:50:10,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308607846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:50:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231321041] [2024-11-28 03:50:10,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:50:10,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:10,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:10,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:50:10,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:50:10,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:10,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:50:10,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:10,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:50:10,953 INFO L349 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2024-11-28 03:50:10,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 230 treesize of output 169 [2024-11-28 03:50:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:50:12,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:14,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2024-11-28 03:50:14,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:50:14,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 609 treesize of output 549 [2024-11-28 03:50:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:50:56,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231321041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:56,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:50:56,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-28 03:50:56,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177867190] [2024-11-28 03:50:56,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:56,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:50:56,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:50:56,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:50:56,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:50:56,262 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:50:56,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 713 transitions, 17398 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 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 03:50:56,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:50:56,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:50:56,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:01,002 INFO L124 PetriNetUnfolderBase]: 1759/3466 cut-off events. [2024-11-28 03:51:01,002 INFO L125 PetriNetUnfolderBase]: For 84709/84709 co-relation queries the response was YES. [2024-11-28 03:51:01,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33929 conditions, 3466 events. 1759/3466 cut-off events. For 84709/84709 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24842 event pairs, 60 based on Foata normal form. 8/3474 useless extension candidates. Maximal degree in co-relation 33814. Up to 1935 conditions per place. [2024-11-28 03:51:01,040 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 459 selfloop transitions, 381 changer transitions 4/845 dead transitions. [2024-11-28 03:51:01,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 845 transitions, 21132 flow [2024-11-28 03:51:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:51:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 03:51:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 249 transitions. [2024-11-28 03:51:01,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42931034482758623 [2024-11-28 03:51:01,041 INFO L175 Difference]: Start difference. First operand has 405 places, 713 transitions, 17398 flow. Second operand 29 states and 249 transitions. [2024-11-28 03:51:01,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 845 transitions, 21132 flow [2024-11-28 03:51:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 845 transitions, 20836 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-11-28 03:51:01,961 INFO L231 Difference]: Finished difference. Result has 436 places, 773 transitions, 20013 flow [2024-11-28 03:51:01,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17151, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20013, PETRI_PLACES=436, PETRI_TRANSITIONS=773} [2024-11-28 03:51:01,963 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2024-11-28 03:51:01,963 INFO L471 AbstractCegarLoop]: Abstraction has has 436 places, 773 transitions, 20013 flow [2024-11-28 03:51:01,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 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 03:51:01,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:01,963 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:01,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:02,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:02,164 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:51:02,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1720711661, now seen corresponding path program 15 times [2024-11-28 03:51:02,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717822176] [2024-11-28 03:51:02,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:51:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:02,190 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:51:02,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717822176] [2024-11-28 03:51:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717822176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993470486] [2024-11-28 03:51:02,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:51:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:02,372 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:51:02,545 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:51:02,545 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:02,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:51:02,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:02,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993470486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:02,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:02,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-11-28 03:51:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517352561] [2024-11-28 03:51:02,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:02,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:51:02,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:02,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:51:02,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:02,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:51:02,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 773 transitions, 20013 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 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 03:51:02,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:02,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:51:02,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:04,568 INFO L124 PetriNetUnfolderBase]: 1675/3288 cut-off events. [2024-11-28 03:51:04,568 INFO L125 PetriNetUnfolderBase]: For 92697/92697 co-relation queries the response was YES. [2024-11-28 03:51:04,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33498 conditions, 3288 events. 1675/3288 cut-off events. For 92697/92697 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22974 event pairs, 118 based on Foata normal form. 80/3368 useless extension candidates. Maximal degree in co-relation 33374. Up to 945 conditions per place. [2024-11-28 03:51:04,605 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 547 selfloop transitions, 258 changer transitions 0/806 dead transitions. [2024-11-28 03:51:04,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 806 transitions, 21533 flow [2024-11-28 03:51:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:51:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:51:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-11-28 03:51:04,606 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-11-28 03:51:04,606 INFO L175 Difference]: Start difference. First operand has 436 places, 773 transitions, 20013 flow. Second operand 14 states and 139 transitions. [2024-11-28 03:51:04,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 806 transitions, 21533 flow [2024-11-28 03:51:05,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 806 transitions, 20876 flow, removed 164 selfloop flow, removed 11 redundant places. [2024-11-28 03:51:05,522 INFO L231 Difference]: Finished difference. Result has 437 places, 744 transitions, 19012 flow [2024-11-28 03:51:05,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18149, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19012, PETRI_PLACES=437, PETRI_TRANSITIONS=744} [2024-11-28 03:51:05,523 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 416 predicate places. [2024-11-28 03:51:05,523 INFO L471 AbstractCegarLoop]: Abstraction has has 437 places, 744 transitions, 19012 flow [2024-11-28 03:51:05,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 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 03:51:05,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:05,523 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:05,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:51:05,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:51:05,724 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:51:05,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2012444284, now seen corresponding path program 4 times [2024-11-28 03:51:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:05,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243912231] [2024-11-28 03:51:05,724 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:51:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:05,740 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:51:05,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:51:05,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243912231] [2024-11-28 03:51:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243912231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:05,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851118770] [2024-11-28 03:51:05,971 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:51:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:05,973 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:05,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:51:06,149 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:51:06,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:06,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:51:06,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:51:06,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:51:07,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851118770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:07,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:07,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 03:51:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843674986] [2024-11-28 03:51:07,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:07,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:51:07,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:07,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:51:07,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:07,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:51:07,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 744 transitions, 19012 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:07,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:07,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:51:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:11,410 INFO L124 PetriNetUnfolderBase]: 1725/3384 cut-off events. [2024-11-28 03:51:11,411 INFO L125 PetriNetUnfolderBase]: For 90135/90135 co-relation queries the response was YES. [2024-11-28 03:51:11,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34120 conditions, 3384 events. 1725/3384 cut-off events. For 90135/90135 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23982 event pairs, 159 based on Foata normal form. 21/3405 useless extension candidates. Maximal degree in co-relation 33998. Up to 718 conditions per place. [2024-11-28 03:51:11,513 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 413 selfloop transitions, 468 changer transitions 0/882 dead transitions. [2024-11-28 03:51:11,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 882 transitions, 22671 flow [2024-11-28 03:51:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:51:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 03:51:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 257 transitions. [2024-11-28 03:51:11,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44310344827586207 [2024-11-28 03:51:11,515 INFO L175 Difference]: Start difference. First operand has 437 places, 744 transitions, 19012 flow. Second operand 29 states and 257 transitions. [2024-11-28 03:51:11,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 882 transitions, 22671 flow [2024-11-28 03:51:12,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 882 transitions, 22277 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-11-28 03:51:12,700 INFO L231 Difference]: Finished difference. Result has 467 places, 788 transitions, 21205 flow [2024-11-28 03:51:12,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18554, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=21205, PETRI_PLACES=467, PETRI_TRANSITIONS=788} [2024-11-28 03:51:12,702 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2024-11-28 03:51:12,702 INFO L471 AbstractCegarLoop]: Abstraction has has 467 places, 788 transitions, 21205 flow [2024-11-28 03:51:12,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:12,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:12,703 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:12,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:12,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:51:12,904 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:51:12,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -94501207, now seen corresponding path program 16 times [2024-11-28 03:51:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:12,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753330052] [2024-11-28 03:51:12,904 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:51:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:12,920 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:51:12,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:13,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:13,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753330052] [2024-11-28 03:51:13,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753330052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:13,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100685483] [2024-11-28 03:51:13,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:51:13,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:13,051 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:13,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:51:13,187 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:51:13,187 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:13,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:51:13,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:13,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100685483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:13,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-11-28 03:51:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113989776] [2024-11-28 03:51:13,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:13,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:51:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:13,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:51:13,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:51:13,567 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:51:13,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 788 transitions, 21205 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:13,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:13,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:51:13,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:21,670 INFO L124 PetriNetUnfolderBase]: 1816/3550 cut-off events. [2024-11-28 03:51:21,670 INFO L125 PetriNetUnfolderBase]: For 103144/103144 co-relation queries the response was YES. [2024-11-28 03:51:21,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37723 conditions, 3550 events. 1816/3550 cut-off events. For 103144/103144 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25346 event pairs, 75 based on Foata normal form. 15/3565 useless extension candidates. Maximal degree in co-relation 37591. Up to 979 conditions per place. [2024-11-28 03:51:21,715 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 478 selfloop transitions, 442 changer transitions 0/921 dead transitions. [2024-11-28 03:51:21,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 921 transitions, 25069 flow [2024-11-28 03:51:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:51:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:51:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 249 transitions. [2024-11-28 03:51:21,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-11-28 03:51:21,717 INFO L175 Difference]: Start difference. First operand has 467 places, 788 transitions, 21205 flow. Second operand 27 states and 249 transitions. [2024-11-28 03:51:21,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 921 transitions, 25069 flow [2024-11-28 03:51:22,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 921 transitions, 24555 flow, removed 154 selfloop flow, removed 11 redundant places. [2024-11-28 03:51:22,958 INFO L231 Difference]: Finished difference. Result has 489 places, 837 transitions, 23284 flow [2024-11-28 03:51:22,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20736, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=23284, PETRI_PLACES=489, PETRI_TRANSITIONS=837} [2024-11-28 03:51:22,959 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2024-11-28 03:51:22,959 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 837 transitions, 23284 flow [2024-11-28 03:51:22,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:22,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:22,959 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:22,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:23,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:51:23,160 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:51:23,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 72423891, now seen corresponding path program 17 times [2024-11-28 03:51:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594841428] [2024-11-28 03:51:23,161 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:23,179 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:23,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:23,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594841428] [2024-11-28 03:51:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594841428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472723268] [2024-11-28 03:51:23,419 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:23,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:23,425 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:23,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:51:23,616 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:23,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:23,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:51:23,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:23,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472723268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:23,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-11-28 03:51:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152263057] [2024-11-28 03:51:23,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:23,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:51:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:23,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:51:23,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:23,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:51:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 837 transitions, 23284 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:51:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:26,984 INFO L124 PetriNetUnfolderBase]: 1810/3528 cut-off events. [2024-11-28 03:51:26,984 INFO L125 PetriNetUnfolderBase]: For 106771/106771 co-relation queries the response was YES. [2024-11-28 03:51:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38505 conditions, 3528 events. 1810/3528 cut-off events. For 106771/106771 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 25070 event pairs, 132 based on Foata normal form. 2/3530 useless extension candidates. Maximal degree in co-relation 38365. Up to 719 conditions per place. [2024-11-28 03:51:27,030 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 541 selfloop transitions, 379 changer transitions 3/924 dead transitions. [2024-11-28 03:51:27,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 924 transitions, 26356 flow [2024-11-28 03:51:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:51:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:51:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 175 transitions. [2024-11-28 03:51:27,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-28 03:51:27,031 INFO L175 Difference]: Start difference. First operand has 489 places, 837 transitions, 23284 flow. Second operand 20 states and 175 transitions. [2024-11-28 03:51:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 924 transitions, 26356 flow [2024-11-28 03:51:28,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 924 transitions, 25819 flow, removed 115 selfloop flow, removed 16 redundant places. [2024-11-28 03:51:28,270 INFO L231 Difference]: Finished difference. Result has 489 places, 831 transitions, 23374 flow [2024-11-28 03:51:28,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22681, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23374, PETRI_PLACES=489, PETRI_TRANSITIONS=831} [2024-11-28 03:51:28,270 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2024-11-28 03:51:28,271 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 831 transitions, 23374 flow [2024-11-28 03:51:28,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:28,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:51:28,271 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:28,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:51:28,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 03:51:28,471 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:51:28,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -700563186, now seen corresponding path program 5 times [2024-11-28 03:51:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875557141] [2024-11-28 03:51:28,472 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:28,483 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:28,483 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:28,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875557141] [2024-11-28 03:51:28,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875557141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683905589] [2024-11-28 03:51:28,672 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:51:28,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:28,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:28,675 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:28,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:51:28,857 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:28,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:28,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:51:28,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:28,930 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 03:51:29,604 INFO L349 Elim1Store]: treesize reduction 52, result has 40.2 percent of original size [2024-11-28 03:51:29,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 236 treesize of output 171 [2024-11-28 03:51:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:29,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:51:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683905589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:33,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:33,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 24 [2024-11-28 03:51:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957147386] [2024-11-28 03:51:33,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:33,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:51:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:33,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:51:33,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:51:33,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:51:33,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 831 transitions, 23374 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 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 03:51:33,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:51:33,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:51:33,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:51:51,378 WARN L286 SmtUtils]: Spent 7.68s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:52:01,796 INFO L124 PetriNetUnfolderBase]: 2003/3861 cut-off events. [2024-11-28 03:52:01,796 INFO L125 PetriNetUnfolderBase]: For 122983/122983 co-relation queries the response was YES. [2024-11-28 03:52:01,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42208 conditions, 3861 events. 2003/3861 cut-off events. For 122983/122983 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27627 event pairs, 37 based on Foata normal form. 57/3918 useless extension candidates. Maximal degree in co-relation 42072. Up to 833 conditions per place. [2024-11-28 03:52:01,838 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 455 selfloop transitions, 592 changer transitions 6/1054 dead transitions. [2024-11-28 03:52:01,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1054 transitions, 28270 flow [2024-11-28 03:52:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 03:52:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-28 03:52:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 472 transitions. [2024-11-28 03:52:01,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44528301886792454 [2024-11-28 03:52:01,840 INFO L175 Difference]: Start difference. First operand has 489 places, 831 transitions, 23374 flow. Second operand 53 states and 472 transitions. [2024-11-28 03:52:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1054 transitions, 28270 flow [2024-11-28 03:52:02,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1054 transitions, 27581 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-11-28 03:52:02,970 INFO L231 Difference]: Finished difference. Result has 536 places, 905 transitions, 26083 flow [2024-11-28 03:52:02,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22012, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=26083, PETRI_PLACES=536, PETRI_TRANSITIONS=905} [2024-11-28 03:52:02,972 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2024-11-28 03:52:02,972 INFO L471 AbstractCegarLoop]: Abstraction has has 536 places, 905 transitions, 26083 flow [2024-11-28 03:52:02,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 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 03:52:02,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:02,972 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:02,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:52:03,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 03:52:03,172 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:52:03,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1964240590, now seen corresponding path program 6 times [2024-11-28 03:52:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:03,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935100060] [2024-11-28 03:52:03,173 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:03,189 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:52:03,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:03,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935100060] [2024-11-28 03:52:03,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935100060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854804848] [2024-11-28 03:52:03,413 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:03,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:03,415 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:03,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:52:03,583 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:52:03,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:03,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:52:03,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:03,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854804848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:03,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:03,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:52:03,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438567803] [2024-11-28 03:52:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:03,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:52:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:03,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:52:03,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:52:03,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:52:03,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 905 transitions, 26083 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:52:03,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:03,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:52:03,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:07,877 INFO L124 PetriNetUnfolderBase]: 2040/3903 cut-off events. [2024-11-28 03:52:07,877 INFO L125 PetriNetUnfolderBase]: For 133586/133586 co-relation queries the response was YES. [2024-11-28 03:52:07,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 3903 events. 2040/3903 cut-off events. For 133586/133586 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27803 event pairs, 188 based on Foata normal form. 61/3964 useless extension candidates. Maximal degree in co-relation 44361. Up to 870 conditions per place. [2024-11-28 03:52:07,928 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 496 selfloop transitions, 526 changer transitions 0/1023 dead transitions. [2024-11-28 03:52:07,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1023 transitions, 29855 flow [2024-11-28 03:52:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:52:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 03:52:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 239 transitions. [2024-11-28 03:52:07,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41206896551724137 [2024-11-28 03:52:07,930 INFO L175 Difference]: Start difference. First operand has 536 places, 905 transitions, 26083 flow. Second operand 29 states and 239 transitions. [2024-11-28 03:52:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1023 transitions, 29855 flow [2024-11-28 03:52:09,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1023 transitions, 28801 flow, removed 248 selfloop flow, removed 24 redundant places. [2024-11-28 03:52:09,357 INFO L231 Difference]: Finished difference. Result has 545 places, 939 transitions, 27179 flow [2024-11-28 03:52:09,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=25099, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27179, PETRI_PLACES=545, PETRI_TRANSITIONS=939} [2024-11-28 03:52:09,358 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 524 predicate places. [2024-11-28 03:52:09,358 INFO L471 AbstractCegarLoop]: Abstraction has has 545 places, 939 transitions, 27179 flow [2024-11-28 03:52:09,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:52:09,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:09,358 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:09,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:52:09,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:52:09,559 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:52:09,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash 688088207, now seen corresponding path program 18 times [2024-11-28 03:52:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:09,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390976379] [2024-11-28 03:52:09,560 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:09,577 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:52:09,577 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:09,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390976379] [2024-11-28 03:52:09,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390976379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:09,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843516646] [2024-11-28 03:52:09,739 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:52:09,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:09,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:09,741 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:52:09,904 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:52:09,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:09,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:52:09,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:09,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843516646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:10,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:10,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2024-11-28 03:52:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458130506] [2024-11-28 03:52:10,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:10,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:52:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:10,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:52:10,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:52:10,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:52:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 939 transitions, 27179 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:52:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:12,315 INFO L124 PetriNetUnfolderBase]: 2103/4064 cut-off events. [2024-11-28 03:52:12,315 INFO L125 PetriNetUnfolderBase]: For 134209/134209 co-relation queries the response was YES. [2024-11-28 03:52:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46032 conditions, 4064 events. 2103/4064 cut-off events. For 134209/134209 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29349 event pairs, 215 based on Foata normal form. 4/4068 useless extension candidates. Maximal degree in co-relation 45884. Up to 867 conditions per place. [2024-11-28 03:52:12,371 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 638 selfloop transitions, 412 changer transitions 10/1061 dead transitions. [2024-11-28 03:52:12,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1061 transitions, 31417 flow [2024-11-28 03:52:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:52:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:52:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 180 transitions. [2024-11-28 03:52:12,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 03:52:12,372 INFO L175 Difference]: Start difference. First operand has 545 places, 939 transitions, 27179 flow. Second operand 20 states and 180 transitions. [2024-11-28 03:52:12,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1061 transitions, 31417 flow [2024-11-28 03:52:14,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1061 transitions, 30599 flow, removed 72 selfloop flow, removed 16 redundant places. [2024-11-28 03:52:14,057 INFO L231 Difference]: Finished difference. Result has 549 places, 947 transitions, 27459 flow [2024-11-28 03:52:14,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26317, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27459, PETRI_PLACES=549, PETRI_TRANSITIONS=947} [2024-11-28 03:52:14,059 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 528 predicate places. [2024-11-28 03:52:14,059 INFO L471 AbstractCegarLoop]: Abstraction has has 549 places, 947 transitions, 27459 flow [2024-11-28 03:52:14,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:14,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:14,059 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:14,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:52:14,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-28 03:52:14,260 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:52:14,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1833276805, now seen corresponding path program 7 times [2024-11-28 03:52:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232888993] [2024-11-28 03:52:14,260 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:52:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:14,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:14,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232888993] [2024-11-28 03:52:14,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232888993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:14,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449582549] [2024-11-28 03:52:14,477 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:52:14,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:14,479 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:14,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:52:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:14,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:52:14,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:14,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:15,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449582549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:15,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:15,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-28 03:52:15,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135528726] [2024-11-28 03:52:15,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:15,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:52:15,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:15,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:52:15,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:52:15,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:52:15,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 947 transitions, 27459 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:15,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:15,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:52:15,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:19,666 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 [] [2024-11-28 03:52:23,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:28,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:31,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:36,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:37,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:38,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:43,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:52:45,964 INFO L124 PetriNetUnfolderBase]: 2193/4255 cut-off events. [2024-11-28 03:52:45,965 INFO L125 PetriNetUnfolderBase]: For 145532/145532 co-relation queries the response was YES. [2024-11-28 03:52:46,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48188 conditions, 4255 events. 2193/4255 cut-off events. For 145532/145532 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31155 event pairs, 257 based on Foata normal form. 33/4288 useless extension candidates. Maximal degree in co-relation 48040. Up to 1349 conditions per place. [2024-11-28 03:52:46,026 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 586 selfloop transitions, 502 changer transitions 0/1089 dead transitions. [2024-11-28 03:52:46,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1089 transitions, 31806 flow [2024-11-28 03:52:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:52:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-28 03:52:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 271 transitions. [2024-11-28 03:52:46,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4106060606060606 [2024-11-28 03:52:46,027 INFO L175 Difference]: Start difference. First operand has 549 places, 947 transitions, 27459 flow. Second operand 33 states and 271 transitions. [2024-11-28 03:52:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1089 transitions, 31806 flow [2024-11-28 03:52:47,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1089 transitions, 30975 flow, removed 50 selfloop flow, removed 11 redundant places. [2024-11-28 03:52:47,509 INFO L231 Difference]: Finished difference. Result has 577 places, 1006 transitions, 30134 flow [2024-11-28 03:52:47,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26636, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30134, PETRI_PLACES=577, PETRI_TRANSITIONS=1006} [2024-11-28 03:52:47,510 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 556 predicate places. [2024-11-28 03:52:47,510 INFO L471 AbstractCegarLoop]: Abstraction has has 577 places, 1006 transitions, 30134 flow [2024-11-28 03:52:47,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:47,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:47,510 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:47,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:52:47,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:47,710 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:52:47,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1269564443, now seen corresponding path program 19 times [2024-11-28 03:52:47,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:47,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173021775] [2024-11-28 03:52:47,711 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:52:47,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173021775] [2024-11-28 03:52:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173021775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179394735] [2024-11-28 03:52:47,835 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:52:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:47,839 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:52:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:47,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:52:47,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:48,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:48,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179394735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:48,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:48,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 03:52:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874550991] [2024-11-28 03:52:48,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:48,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:52:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:48,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:52:48,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:52:48,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:52:48,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 1006 transitions, 30134 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:48,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:48,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:52:48,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:50,456 INFO L124 PetriNetUnfolderBase]: 2268/4432 cut-off events. [2024-11-28 03:52:50,456 INFO L125 PetriNetUnfolderBase]: For 167684/167684 co-relation queries the response was YES. [2024-11-28 03:52:50,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51624 conditions, 4432 events. 2268/4432 cut-off events. For 167684/167684 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32861 event pairs, 521 based on Foata normal form. 25/4457 useless extension candidates. Maximal degree in co-relation 51463. Up to 2261 conditions per place. [2024-11-28 03:52:50,683 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 853 selfloop transitions, 232 changer transitions 0/1086 dead transitions. [2024-11-28 03:52:50,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 1086 transitions, 33493 flow [2024-11-28 03:52:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:52:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:52:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 150 transitions. [2024-11-28 03:52:50,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-28 03:52:50,684 INFO L175 Difference]: Start difference. First operand has 577 places, 1006 transitions, 30134 flow. Second operand 16 states and 150 transitions. [2024-11-28 03:52:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 1086 transitions, 33493 flow [2024-11-28 03:52:52,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 1086 transitions, 33055 flow, removed 131 selfloop flow, removed 12 redundant places. [2024-11-28 03:52:52,574 INFO L231 Difference]: Finished difference. Result has 585 places, 1015 transitions, 30580 flow [2024-11-28 03:52:52,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29494, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=30580, PETRI_PLACES=585, PETRI_TRANSITIONS=1015} [2024-11-28 03:52:52,575 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2024-11-28 03:52:52,575 INFO L471 AbstractCegarLoop]: Abstraction has has 585 places, 1015 transitions, 30580 flow [2024-11-28 03:52:52,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:52:52,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:52:52,576 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:52,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 03:52:52,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:52,776 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:52:52,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash -980943381, now seen corresponding path program 8 times [2024-11-28 03:52:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:52:52,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481142866] [2024-11-28 03:52:52,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:52:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:52:52,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:52:52,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:53,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:52:53,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481142866] [2024-11-28 03:52:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481142866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027224953] [2024-11-28 03:52:53,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:52:53,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:53,197 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:53,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:52:53,414 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:52:53,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:52:53,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:52:53,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:53,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:52:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027224953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:53,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:52:53,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643691067] [2024-11-28 03:52:53,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:53,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:52:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:53,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:52:53,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:52:53,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:52:53,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1015 transitions, 30580 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:52:53,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:52:53,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:52:53,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:52:59,307 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 [] [2024-11-28 03:53:03,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:05,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:10,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:14,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:16,480 INFO L124 PetriNetUnfolderBase]: 2290/4482 cut-off events. [2024-11-28 03:53:16,480 INFO L125 PetriNetUnfolderBase]: For 174624/174624 co-relation queries the response was YES. [2024-11-28 03:53:16,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52456 conditions, 4482 events. 2290/4482 cut-off events. For 174624/174624 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33444 event pairs, 733 based on Foata normal form. 18/4500 useless extension candidates. Maximal degree in co-relation 52291. Up to 3583 conditions per place. [2024-11-28 03:53:16,559 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 895 selfloop transitions, 202 changer transitions 0/1098 dead transitions. [2024-11-28 03:53:16,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1098 transitions, 33799 flow [2024-11-28 03:53:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:53:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:53:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 212 transitions. [2024-11-28 03:53:16,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-11-28 03:53:16,561 INFO L175 Difference]: Start difference. First operand has 585 places, 1015 transitions, 30580 flow. Second operand 27 states and 212 transitions. [2024-11-28 03:53:16,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1098 transitions, 33799 flow [2024-11-28 03:53:18,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1098 transitions, 33424 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-11-28 03:53:19,151 INFO L231 Difference]: Finished difference. Result has 607 places, 1038 transitions, 31521 flow [2024-11-28 03:53:19,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30170, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31521, PETRI_PLACES=607, PETRI_TRANSITIONS=1038} [2024-11-28 03:53:19,152 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 586 predicate places. [2024-11-28 03:53:19,152 INFO L471 AbstractCegarLoop]: Abstraction has has 607 places, 1038 transitions, 31521 flow [2024-11-28 03:53:19,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:53:19,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:53:19,153 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:19,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-28 03:53:19,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:19,353 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:53:19,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:19,354 INFO L85 PathProgramCache]: Analyzing trace with hash -895417383, now seen corresponding path program 20 times [2024-11-28 03:53:19,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:19,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484501539] [2024-11-28 03:53:19,354 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:53:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:19,369 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:53:19,369 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484501539] [2024-11-28 03:53:19,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484501539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:19,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229883943] [2024-11-28 03:53:19,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:53:19,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:19,500 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:19,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:53:19,661 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:53:19,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:19,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:53:19,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:19,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229883943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:19,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:53:19,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2024-11-28 03:53:19,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122950528] [2024-11-28 03:53:19,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:19,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:53:19,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:19,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:53:19,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:53:19,905 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:53:19,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1038 transitions, 31521 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:53:19,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:53:19,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:53:19,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:53:22,923 INFO L124 PetriNetUnfolderBase]: 2288/4472 cut-off events. [2024-11-28 03:53:22,923 INFO L125 PetriNetUnfolderBase]: For 177855/177855 co-relation queries the response was YES. [2024-11-28 03:53:22,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52810 conditions, 4472 events. 2288/4472 cut-off events. For 177855/177855 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33297 event pairs, 472 based on Foata normal form. 2/4474 useless extension candidates. Maximal degree in co-relation 52639. Up to 1938 conditions per place. [2024-11-28 03:53:23,001 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 788 selfloop transitions, 289 changer transitions 7/1085 dead transitions. [2024-11-28 03:53:23,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1085 transitions, 34369 flow [2024-11-28 03:53:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:53:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:53:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 97 transitions. [2024-11-28 03:53:23,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-11-28 03:53:23,002 INFO L175 Difference]: Start difference. First operand has 607 places, 1038 transitions, 31521 flow. Second operand 12 states and 97 transitions. [2024-11-28 03:53:23,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1085 transitions, 34369 flow [2024-11-28 03:53:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 1085 transitions, 34004 flow, removed 108 selfloop flow, removed 14 redundant places. [2024-11-28 03:53:25,353 INFO L231 Difference]: Finished difference. Result has 604 places, 1033 transitions, 31600 flow [2024-11-28 03:53:25,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=31135, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=31600, PETRI_PLACES=604, PETRI_TRANSITIONS=1033} [2024-11-28 03:53:25,354 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 583 predicate places. [2024-11-28 03:53:25,354 INFO L471 AbstractCegarLoop]: Abstraction has has 604 places, 1033 transitions, 31600 flow [2024-11-28 03:53:25,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:53:25,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:53:25,354 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:25,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:53:25,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 03:53:25,555 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:53:25,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash -984522220, now seen corresponding path program 11 times [2024-11-28 03:53:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946818896] [2024-11-28 03:53:25,555 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:53:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:25,590 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:53:25,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:25,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:25,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946818896] [2024-11-28 03:53:25,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946818896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:25,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914132234] [2024-11-28 03:53:25,946 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:53:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:25,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:25,948 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:53:26,137 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:53:26,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:26,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:53:26,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:26,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914132234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:26,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:53:26,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:53:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668659703] [2024-11-28 03:53:26,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:26,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:53:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:26,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:53:26,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:53:26,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:53:26,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1033 transitions, 31600 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 03:53:26,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:53:26,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:53:26,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:53:31,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:33,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:37,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:39,289 INFO L124 PetriNetUnfolderBase]: 2505/4871 cut-off events. [2024-11-28 03:53:39,289 INFO L125 PetriNetUnfolderBase]: For 199043/199043 co-relation queries the response was YES. [2024-11-28 03:53:39,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57986 conditions, 4871 events. 2505/4871 cut-off events. For 199043/199043 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36717 event pairs, 551 based on Foata normal form. 18/4889 useless extension candidates. Maximal degree in co-relation 57816. Up to 2931 conditions per place. [2024-11-28 03:53:39,544 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 709 selfloop transitions, 475 changer transitions 0/1185 dead transitions. [2024-11-28 03:53:39,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1185 transitions, 37773 flow [2024-11-28 03:53:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:53:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:53:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 177 transitions. [2024-11-28 03:53:39,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46578947368421053 [2024-11-28 03:53:39,545 INFO L175 Difference]: Start difference. First operand has 604 places, 1033 transitions, 31600 flow. Second operand 19 states and 177 transitions. [2024-11-28 03:53:39,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1185 transitions, 37773 flow [2024-11-28 03:53:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1185 transitions, 36989 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-11-28 03:53:41,861 INFO L231 Difference]: Finished difference. Result has 612 places, 1112 transitions, 35175 flow [2024-11-28 03:53:41,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=30813, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35175, PETRI_PLACES=612, PETRI_TRANSITIONS=1112} [2024-11-28 03:53:41,862 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 591 predicate places. [2024-11-28 03:53:41,863 INFO L471 AbstractCegarLoop]: Abstraction has has 612 places, 1112 transitions, 35175 flow [2024-11-28 03:53:41,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 03:53:41,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:53:41,863 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:41,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 03:53:42,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 03:53:42,063 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:53:42,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:42,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1487289647, now seen corresponding path program 9 times [2024-11-28 03:53:42,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:53:42,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045827962] [2024-11-28 03:53:42,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:53:42,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:53:42,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:53:42,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:53:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045827962] [2024-11-28 03:53:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045827962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:53:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353828808] [2024-11-28 03:53:42,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:53:42,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:42,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:42,304 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:53:42,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:53:42,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:42,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:53:42,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:42,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:53:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353828808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:43,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:53:43,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:53:43,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917549422] [2024-11-28 03:53:43,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:43,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:53:43,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:53:43,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:53:43,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:53:43,077 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:53:43,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1112 transitions, 35175 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:53:43,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:53:43,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:53:43,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:53:46,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:51,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:55,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:53:58,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:00,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:02,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:07,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:08,703 INFO L124 PetriNetUnfolderBase]: 2623/5059 cut-off events. [2024-11-28 03:54:08,703 INFO L125 PetriNetUnfolderBase]: For 225855/225855 co-relation queries the response was YES. [2024-11-28 03:54:08,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62010 conditions, 5059 events. 2623/5059 cut-off events. For 225855/225855 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 38134 event pairs, 384 based on Foata normal form. 33/5092 useless extension candidates. Maximal degree in co-relation 61833. Up to 2029 conditions per place. [2024-11-28 03:54:08,785 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 667 selfloop transitions, 574 changer transitions 0/1242 dead transitions. [2024-11-28 03:54:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1242 transitions, 40019 flow [2024-11-28 03:54:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:54:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 03:54:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 243 transitions. [2024-11-28 03:54:08,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3919354838709677 [2024-11-28 03:54:08,787 INFO L175 Difference]: Start difference. First operand has 612 places, 1112 transitions, 35175 flow. Second operand 31 states and 243 transitions. [2024-11-28 03:54:08,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1242 transitions, 40019 flow [2024-11-28 03:54:11,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1242 transitions, 39033 flow, removed 264 selfloop flow, removed 6 redundant places. [2024-11-28 03:54:11,736 INFO L231 Difference]: Finished difference. Result has 644 places, 1164 transitions, 37928 flow [2024-11-28 03:54:11,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34291, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=37928, PETRI_PLACES=644, PETRI_TRANSITIONS=1164} [2024-11-28 03:54:11,737 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 623 predicate places. [2024-11-28 03:54:11,737 INFO L471 AbstractCegarLoop]: Abstraction has has 644 places, 1164 transitions, 37928 flow [2024-11-28 03:54:11,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:54:11,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:54:11,737 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:11,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:11,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 03:54:11,938 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:54:11,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1425315002, now seen corresponding path program 12 times [2024-11-28 03:54:11,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:11,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915242071] [2024-11-28 03:54:11,939 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:54:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:11,962 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:54:11,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915242071] [2024-11-28 03:54:12,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915242071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176327353] [2024-11-28 03:54:12,307 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:54:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:12,310 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:12,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:54:12,578 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:54:12,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:12,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:54:12,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:12,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176327353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:13,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-28 03:54:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709300671] [2024-11-28 03:54:13,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:13,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:54:13,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:13,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:54:13,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:54:13,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:54:13,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 1164 transitions, 37928 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 03:54:13,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:54:13,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:54:13,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:54:18,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:21,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:27,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:54:32,125 INFO L124 PetriNetUnfolderBase]: 2808/5438 cut-off events. [2024-11-28 03:54:32,125 INFO L125 PetriNetUnfolderBase]: For 273636/273636 co-relation queries the response was YES. [2024-11-28 03:54:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68253 conditions, 5438 events. 2808/5438 cut-off events. For 273636/273636 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 41804 event pairs, 88 based on Foata normal form. 71/5509 useless extension candidates. Maximal degree in co-relation 68068. Up to 1136 conditions per place. [2024-11-28 03:54:32,212 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 458 selfloop transitions, 963 changer transitions 0/1422 dead transitions. [2024-11-28 03:54:32,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1422 transitions, 46333 flow [2024-11-28 03:54:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 03:54:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-28 03:54:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 372 transitions. [2024-11-28 03:54:32,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4043478260869565 [2024-11-28 03:54:32,214 INFO L175 Difference]: Start difference. First operand has 644 places, 1164 transitions, 37928 flow. Second operand 46 states and 372 transitions. [2024-11-28 03:54:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1422 transitions, 46333 flow [2024-11-28 03:54:35,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1422 transitions, 45906 flow, removed 174 selfloop flow, removed 10 redundant places. [2024-11-28 03:54:35,615 INFO L231 Difference]: Finished difference. Result has 690 places, 1274 transitions, 44080 flow [2024-11-28 03:54:35,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37169, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=855, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=44080, PETRI_PLACES=690, PETRI_TRANSITIONS=1274} [2024-11-28 03:54:35,616 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 669 predicate places. [2024-11-28 03:54:35,617 INFO L471 AbstractCegarLoop]: Abstraction has has 690 places, 1274 transitions, 44080 flow [2024-11-28 03:54:35,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 03:54:35,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:54:35,617 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:35,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:54:35,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 03:54:35,817 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:54:35,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 746817847, now seen corresponding path program 10 times [2024-11-28 03:54:35,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:35,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729521107] [2024-11-28 03:54:35,818 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:35,831 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:35,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729521107] [2024-11-28 03:54:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729521107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094057774] [2024-11-28 03:54:36,031 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:54:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:36,033 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:36,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:54:36,207 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:54:36,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:36,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:54:36,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:36,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094057774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:36,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:54:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557075056] [2024-11-28 03:54:36,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:36,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:54:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:36,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:54:36,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:54:36,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:54:36,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1274 transitions, 44080 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:54:36,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:54:36,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:54:36,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:54:43,306 INFO L124 PetriNetUnfolderBase]: 2868/5519 cut-off events. [2024-11-28 03:54:43,307 INFO L125 PetriNetUnfolderBase]: For 288293/288293 co-relation queries the response was YES. [2024-11-28 03:54:43,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72944 conditions, 5519 events. 2868/5519 cut-off events. For 288293/288293 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42228 event pairs, 452 based on Foata normal form. 27/5546 useless extension candidates. Maximal degree in co-relation 72749. Up to 2359 conditions per place. [2024-11-28 03:54:43,409 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 770 selfloop transitions, 615 changer transitions 0/1386 dead transitions. [2024-11-28 03:54:43,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 1386 transitions, 48890 flow [2024-11-28 03:54:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:54:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:54:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 233 transitions. [2024-11-28 03:54:43,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3883333333333333 [2024-11-28 03:54:43,410 INFO L175 Difference]: Start difference. First operand has 690 places, 1274 transitions, 44080 flow. Second operand 30 states and 233 transitions. [2024-11-28 03:54:43,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 1386 transitions, 48890 flow [2024-11-28 03:54:47,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 1386 transitions, 46435 flow, removed 684 selfloop flow, removed 23 redundant places. [2024-11-28 03:54:47,786 INFO L231 Difference]: Finished difference. Result has 702 places, 1313 transitions, 44557 flow [2024-11-28 03:54:47,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=41561, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=44557, PETRI_PLACES=702, PETRI_TRANSITIONS=1313} [2024-11-28 03:54:47,787 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 681 predicate places. [2024-11-28 03:54:47,787 INFO L471 AbstractCegarLoop]: Abstraction has has 702 places, 1313 transitions, 44557 flow [2024-11-28 03:54:47,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 03:54:47,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:54:47,788 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:47,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:47,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:54:47,988 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:54:47,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 763218177, now seen corresponding path program 21 times [2024-11-28 03:54:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:54:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482031582] [2024-11-28 03:54:47,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:54:48,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:54:48,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:54:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482031582] [2024-11-28 03:54:48,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482031582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:54:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126561145] [2024-11-28 03:54:48,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:54:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:48,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:48,192 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:48,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:54:48,377 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:54:48,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:54:48,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:54:48,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:48,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:54:48,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126561145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:48,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:54:48,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-28 03:54:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139786253] [2024-11-28 03:54:48,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:48,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:54:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:54:48,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:54:48,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:54:48,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:54:48,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 1313 transitions, 44557 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:54:48,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:54:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:54:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:55:01,966 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 33 DAG size of output: 31 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 03:55:06,270 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 [] [2024-11-28 03:55:10,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:55:20,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:55:23,241 INFO L124 PetriNetUnfolderBase]: 2946/5661 cut-off events. [2024-11-28 03:55:23,241 INFO L125 PetriNetUnfolderBase]: For 280592/280592 co-relation queries the response was YES. [2024-11-28 03:55:23,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73544 conditions, 5661 events. 2946/5661 cut-off events. For 280592/280592 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 43282 event pairs, 606 based on Foata normal form. 25/5686 useless extension candidates. Maximal degree in co-relation 73347. Up to 3633 conditions per place. [2024-11-28 03:55:23,327 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 865 selfloop transitions, 551 changer transitions 0/1417 dead transitions. [2024-11-28 03:55:23,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1417 transitions, 49323 flow [2024-11-28 03:55:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:55:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:55:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 202 transitions. [2024-11-28 03:55:23,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-11-28 03:55:23,328 INFO L175 Difference]: Start difference. First operand has 702 places, 1313 transitions, 44557 flow. Second operand 24 states and 202 transitions. [2024-11-28 03:55:23,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1417 transitions, 49323 flow [2024-11-28 03:55:27,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1417 transitions, 48198 flow, removed 121 selfloop flow, removed 16 redundant places. [2024-11-28 03:55:27,133 INFO L231 Difference]: Finished difference. Result has 714 places, 1361 transitions, 46279 flow [2024-11-28 03:55:27,134 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=43005, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=46279, PETRI_PLACES=714, PETRI_TRANSITIONS=1361} [2024-11-28 03:55:27,134 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 693 predicate places. [2024-11-28 03:55:27,134 INFO L471 AbstractCegarLoop]: Abstraction has has 714 places, 1361 transitions, 46279 flow [2024-11-28 03:55:27,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:55:27,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:55:27,134 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:55:27,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-28 03:55:27,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:55:27,335 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:55:27,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:55:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2087466553, now seen corresponding path program 22 times [2024-11-28 03:55:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:55:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590207091] [2024-11-28 03:55:27,335 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:55:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:55:27,346 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:55:27,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:55:27,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:55:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590207091] [2024-11-28 03:55:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590207091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:55:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856603040] [2024-11-28 03:55:27,443 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:55:27,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:55:27,444 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:55:27,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:55:27,604 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:55:27,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:27,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:55:27,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:55:27,667 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 03:55:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:55:28,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:55:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856603040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:42,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:55:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-11-28 03:55:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377792122] [2024-11-28 03:55:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:42,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:55:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:55:42,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:55:42,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=376, Unknown=1, NotChecked=0, Total=462 [2024-11-28 03:55:42,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:55:42,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 1361 transitions, 46279 flow. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:55:42,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:55:42,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:55:42,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:55:47,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:55:52,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:55:56,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:56:02,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 03:56:03,128 INFO L124 PetriNetUnfolderBase]: 3092/5875 cut-off events. [2024-11-28 03:56:03,128 INFO L125 PetriNetUnfolderBase]: For 289876/289876 co-relation queries the response was YES. [2024-11-28 03:56:03,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77699 conditions, 5875 events. 3092/5875 cut-off events. For 289876/289876 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44542 event pairs, 198 based on Foata normal form. 6/5881 useless extension candidates. Maximal degree in co-relation 77496. Up to 2866 conditions per place. [2024-11-28 03:56:03,225 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 1044 selfloop transitions, 461 changer transitions 15/1521 dead transitions. [2024-11-28 03:56:03,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1521 transitions, 52953 flow [2024-11-28 03:56:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:56:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 03:56:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 234 transitions. [2024-11-28 03:56:03,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-11-28 03:56:03,227 INFO L175 Difference]: Start difference. First operand has 714 places, 1361 transitions, 46279 flow. Second operand 31 states and 234 transitions. [2024-11-28 03:56:03,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1521 transitions, 52953 flow [2024-11-28 03:56:07,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 1521 transitions, 52170 flow, removed 99 selfloop flow, removed 13 redundant places. [2024-11-28 03:56:07,575 INFO L231 Difference]: Finished difference. Result has 736 places, 1414 transitions, 48558 flow [2024-11-28 03:56:07,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=45441, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=48558, PETRI_PLACES=736, PETRI_TRANSITIONS=1414} [2024-11-28 03:56:07,576 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 715 predicate places. [2024-11-28 03:56:07,576 INFO L471 AbstractCegarLoop]: Abstraction has has 736 places, 1414 transitions, 48558 flow [2024-11-28 03:56:07,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:07,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:07,577 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:07,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 03:56:07,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:07,777 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:56:07,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash 602670063, now seen corresponding path program 11 times [2024-11-28 03:56:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:07,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226685770] [2024-11-28 03:56:07,778 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:56:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:07,794 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:56:07,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:07,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226685770] [2024-11-28 03:56:07,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226685770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484442010] [2024-11-28 03:56:07,944 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:56:07,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:07,946 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:07,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:56:08,200 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:56:08,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:08,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:56:08,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:08,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484442010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:08,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-28 03:56:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018389186] [2024-11-28 03:56:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:08,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:56:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:08,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:56:08,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:56:08,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:56:08,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 1414 transitions, 48558 flow. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:08,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:08,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:56:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:23,570 INFO L124 PetriNetUnfolderBase]: 3966/7580 cut-off events. [2024-11-28 03:56:23,570 INFO L125 PetriNetUnfolderBase]: For 378668/378668 co-relation queries the response was YES. [2024-11-28 03:56:23,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100282 conditions, 7580 events. 3966/7580 cut-off events. For 378668/378668 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 58866 event pairs, 130 based on Foata normal form. 4/7584 useless extension candidates. Maximal degree in co-relation 100078. Up to 1799 conditions per place. [2024-11-28 03:56:23,752 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 702 selfloop transitions, 1279 changer transitions 0/1982 dead transitions. [2024-11-28 03:56:23,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1982 transitions, 69356 flow [2024-11-28 03:56:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:56:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:56:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 220 transitions. [2024-11-28 03:56:23,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-28 03:56:23,753 INFO L175 Difference]: Start difference. First operand has 736 places, 1414 transitions, 48558 flow. Second operand 30 states and 220 transitions. [2024-11-28 03:56:23,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1982 transitions, 69356 flow [2024-11-28 03:56:30,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 1982 transitions, 67275 flow, removed 290 selfloop flow, removed 25 redundant places. [2024-11-28 03:56:30,252 INFO L231 Difference]: Finished difference. Result has 740 places, 1760 transitions, 61332 flow [2024-11-28 03:56:30,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=47037, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=61332, PETRI_PLACES=740, PETRI_TRANSITIONS=1760} [2024-11-28 03:56:30,253 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 719 predicate places. [2024-11-28 03:56:30,253 INFO L471 AbstractCegarLoop]: Abstraction has has 740 places, 1760 transitions, 61332 flow [2024-11-28 03:56:30,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:30,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:30,254 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:30,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 03:56:30,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:30,454 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:56:30,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1937261393, now seen corresponding path program 12 times [2024-11-28 03:56:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111140506] [2024-11-28 03:56:30,455 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:56:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:30,470 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:56:30,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111140506] [2024-11-28 03:56:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111140506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675811676] [2024-11-28 03:56:30,675 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:56:30,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:30,680 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:30,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef49cf0-1cf0-4d30-aef5-8da22af94be4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:56:30,900 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:56:30,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:56:30,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:56:30,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:30,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:56:31,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675811676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:31,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:31,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-28 03:56:31,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796447322] [2024-11-28 03:56:31,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:31,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:56:31,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:31,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:56:31,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:56:31,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 03:56:31,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 740 places, 1760 transitions, 61332 flow. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 18 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:31,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:31,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 03:56:31,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:42,898 INFO L124 PetriNetUnfolderBase]: 4134/7822 cut-off events. [2024-11-28 03:56:42,898 INFO L125 PetriNetUnfolderBase]: For 416307/416307 co-relation queries the response was YES. [2024-11-28 03:56:43,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105714 conditions, 7822 events. 4134/7822 cut-off events. For 416307/416307 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 60886 event pairs, 399 based on Foata normal form. 10/7832 useless extension candidates. Maximal degree in co-relation 105508. Up to 2448 conditions per place. [2024-11-28 03:56:43,063 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 854 selfloop transitions, 1101 changer transitions 0/1956 dead transitions. [2024-11-28 03:56:43,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 1956 transitions, 69649 flow [2024-11-28 03:56:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:56:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-28 03:56:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 308 transitions. [2024-11-28 03:56:43,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-28 03:56:43,065 INFO L175 Difference]: Start difference. First operand has 740 places, 1760 transitions, 61332 flow. Second operand 42 states and 308 transitions. [2024-11-28 03:56:43,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 1956 transitions, 69649 flow