./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/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_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/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_679794dd-0a95-4ecf-a7bc-7653642af9cb/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:21:34,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:21:34,571 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:21:34,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:21:34,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:21:34,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:21:34,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:21:34,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:21:34,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:21:34,630 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:21:34,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:21:34,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:21:34,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:21:34,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:21:34,632 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:21:34,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:21:34,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:21:34,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:21:34,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:21:34,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:21:34,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:21:34,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:21:34,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:21:34,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:21:34,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:21:34,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:21:34,634 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:21:34,634 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:21:34,634 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:21:34,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:34,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:34,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:34,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:34,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:21:34,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:34,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:34,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:34,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:34,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:21:34,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:21:34,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:21:34,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:21:34,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:21:34,638 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_679794dd-0a95-4ecf-a7bc-7653642af9cb/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 -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-28 05:21:34,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:21:34,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:21:34,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:21:34,960 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:21:34,961 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:21:34,962 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-28 05:21:38,237 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/data/3263b7e65/f3fc10aa70894082b400dc0382ba4b81/FLAG5b97f3b38 [2024-11-28 05:21:38,551 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:21:38,552 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-28 05:21:38,570 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/data/3263b7e65/f3fc10aa70894082b400dc0382ba4b81/FLAG5b97f3b38 [2024-11-28 05:21:38,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/data/3263b7e65/f3fc10aa70894082b400dc0382ba4b81 [2024-11-28 05:21:38,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:21:38,835 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:21:38,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:38,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:21:38,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:21:38,845 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:38" (1/1) ... [2024-11-28 05:21:38,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508b877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:38, skipping insertion in model container [2024-11-28 05:21:38,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:38" (1/1) ... [2024-11-28 05:21:38,875 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:21:39,131 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_679794dd-0a95-4ecf-a7bc-7653642af9cb/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-11-28 05:21:39,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:39,154 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:21:39,181 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_679794dd-0a95-4ecf-a7bc-7653642af9cb/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-11-28 05:21:39,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:39,209 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:21:39,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39 WrapperNode [2024-11-28 05:21:39,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:39,211 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:39,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:21:39,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:21:39,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,236 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,280 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 187 [2024-11-28 05:21:39,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:39,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:21:39,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:21:39,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:21:39,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,299 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,340 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 05:21:39,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,354 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,356 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:21:39,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:21:39,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:21:39,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:21:39,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (1/1) ... [2024-11-28 05:21:39,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:39,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:21:39,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:21:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:21:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:21:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:21:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:21:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:21:39,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:21:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:21:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:21:39,479 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 05:21:39,659 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:21:39,662 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:21:40,263 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:21:40,263 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:21:40,725 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:21:40,726 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:21:40,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:40 BoogieIcfgContainer [2024-11-28 05:21:40,727 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:21:40,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:21:40,731 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:21:40,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:21:40,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:21:38" (1/3) ... [2024-11-28 05:21:40,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424efbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:40, skipping insertion in model container [2024-11-28 05:21:40,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:39" (2/3) ... [2024-11-28 05:21:40,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424efbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:40, skipping insertion in model container [2024-11-28 05:21:40,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:40" (3/3) ... [2024-11-28 05:21:40,746 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-28 05:21:40,768 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:21:40,770 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-counter-fun.wvr.c that has 3 procedures, 23 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 05:21:40,771 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:21:40,858 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:21:40,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-11-28 05:21:40,975 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-28 05:21:40,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:21:40,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-28 05:21:40,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-11-28 05:21:40,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 58 flow [2024-11-28 05:21:40,998 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:21:41,021 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;@938535e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:21:41,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 05:21:41,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:21:41,047 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-11-28 05:21:41,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:21:41,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:41,048 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:41,048 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 05:21:41,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 95577255, now seen corresponding path program 1 times [2024-11-28 05:21:41,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329694209] [2024-11-28 05:21:41,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:41,509 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 05:21:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329694209] [2024-11-28 05:21:41,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329694209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:41,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:41,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476153123] [2024-11-28 05:21:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:41,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:41,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:41,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:41,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:41,569 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-28 05:21:41,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 05:21:41,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:41,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-28 05:21:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:41,799 INFO L124 PetriNetUnfolderBase]: 94/185 cut-off events. [2024-11-28 05:21:41,800 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-28 05:21:41,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 185 events. 94/185 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 600 event pairs, 22 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-11-28 05:21:41,808 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-11-28 05:21:41,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-11-28 05:21:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-11-28 05:21:41,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-11-28 05:21:41,828 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 3 states and 47 transitions. [2024-11-28 05:21:41,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-11-28 05:21:41,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:41,841 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 69 flow [2024-11-28 05:21:41,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2024-11-28 05:21:41,852 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-11-28 05:21:41,852 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 69 flow [2024-11-28 05:21:41,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 05:21:41,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:41,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:41,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:21:41,853 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 05:21:41,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -10121531, now seen corresponding path program 1 times [2024-11-28 05:21:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539723398] [2024-11-28 05:21:41,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:21:42,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539723398] [2024-11-28 05:21:42,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539723398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:42,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:42,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:21:42,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012002719] [2024-11-28 05:21:42,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:42,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:42,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:42,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:42,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:42,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-28 05:21:42,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:21:42,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:42,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-28 05:21:42,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:42,652 INFO L124 PetriNetUnfolderBase]: 118/248 cut-off events. [2024-11-28 05:21:42,652 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-28 05:21:42,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 248 events. 118/248 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 954 event pairs, 84 based on Foata normal form. 14/256 useless extension candidates. Maximal degree in co-relation 242. Up to 168 conditions per place. [2024-11-28 05:21:42,655 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-11-28 05:21:42,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 181 flow [2024-11-28 05:21:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-11-28 05:21:42,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-11-28 05:21:42,657 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 69 flow. Second operand 5 states and 63 transitions. [2024-11-28 05:21:42,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 181 flow [2024-11-28 05:21:42,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:42,659 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 86 flow [2024-11-28 05:21:42,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-11-28 05:21:42,660 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-11-28 05:21:42,660 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 86 flow [2024-11-28 05:21:42,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 05:21:42,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:42,661 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:42,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:21:42,661 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 05:21:42,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1502132036, now seen corresponding path program 1 times [2024-11-28 05:21:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:42,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813098199] [2024-11-28 05:21:42,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:42,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:42,912 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 05:21:42,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:42,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813098199] [2024-11-28 05:21:42,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813098199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:42,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:42,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:21:42,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762503102] [2024-11-28 05:21:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:42,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:21:42,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:42,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:21:42,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:21:42,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:42,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 05:21:42,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:42,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:42,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:43,251 INFO L124 PetriNetUnfolderBase]: 195/350 cut-off events. [2024-11-28 05:21:43,251 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-28 05:21:43,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 350 events. 195/350 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1439 event pairs, 58 based on Foata normal form. 13/333 useless extension candidates. Maximal degree in co-relation 788. Up to 185 conditions per place. [2024-11-28 05:21:43,256 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 51 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-11-28 05:21:43,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 61 transitions, 307 flow [2024-11-28 05:21:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:21:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:21:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-11-28 05:21:43,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 05:21:43,259 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 86 flow. Second operand 6 states and 78 transitions. [2024-11-28 05:21:43,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 61 transitions, 307 flow [2024-11-28 05:21:43,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 287 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:43,263 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 134 flow [2024-11-28 05:21:43,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-28 05:21:43,266 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-11-28 05:21:43,266 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 134 flow [2024-11-28 05:21:43,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 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 05:21:43,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:43,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:43,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:21:43,268 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 05:21:43,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1802600764, now seen corresponding path program 2 times [2024-11-28 05:21:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:43,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232834357] [2024-11-28 05:21:43,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:43,338 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:43,340 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:43,543 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 05:21:43,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:43,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232834357] [2024-11-28 05:21:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232834357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:43,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082940896] [2024-11-28 05:21:43,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:43,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:43,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:43,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:21:43,703 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:43,703 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:43,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:43,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:43,819 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 05:21:43,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:43,886 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 05:21:43,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082940896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:43,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:43,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-28 05:21:43,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534647466] [2024-11-28 05:21:43,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:43,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:21:43,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:43,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:21:43,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:21:43,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:43,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:43,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:43,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:43,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:44,523 INFO L124 PetriNetUnfolderBase]: 301/523 cut-off events. [2024-11-28 05:21:44,523 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-11-28 05:21:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 523 events. 301/523 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2142 event pairs, 23 based on Foata normal form. 9/506 useless extension candidates. Maximal degree in co-relation 1535. Up to 102 conditions per place. [2024-11-28 05:21:44,529 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 76 selfloop transitions, 30 changer transitions 0/107 dead transitions. [2024-11-28 05:21:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 107 transitions, 617 flow [2024-11-28 05:21:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:21:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:21:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2024-11-28 05:21:44,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-11-28 05:21:44,535 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 134 flow. Second operand 14 states and 140 transitions. [2024-11-28 05:21:44,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 107 transitions, 617 flow [2024-11-28 05:21:44,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 107 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:44,548 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 314 flow [2024-11-28 05:21:44,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=314, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2024-11-28 05:21:44,550 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2024-11-28 05:21:44,551 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 314 flow [2024-11-28 05:21:44,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:44,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:44,552 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:44,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:44,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:44,753 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 05:21:44,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -774877073, now seen corresponding path program 1 times [2024-11-28 05:21:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692556234] [2024-11-28 05:21:44,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692556234] [2024-11-28 05:21:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692556234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:44,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675709480] [2024-11-28 05:21:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:44,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:44,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:44,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:44,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:44,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:44,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:44,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:45,231 INFO L124 PetriNetUnfolderBase]: 255/463 cut-off events. [2024-11-28 05:21:45,231 INFO L125 PetriNetUnfolderBase]: For 811/822 co-relation queries the response was YES. [2024-11-28 05:21:45,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1631 conditions, 463 events. 255/463 cut-off events. For 811/822 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2002 event pairs, 77 based on Foata normal form. 3/458 useless extension candidates. Maximal degree in co-relation 1606. Up to 253 conditions per place. [2024-11-28 05:21:45,237 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 61 selfloop transitions, 7 changer transitions 6/78 dead transitions. [2024-11-28 05:21:45,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 569 flow [2024-11-28 05:21:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-11-28 05:21:45,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-11-28 05:21:45,239 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 314 flow. Second operand 5 states and 67 transitions. [2024-11-28 05:21:45,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 569 flow [2024-11-28 05:21:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 528 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:45,252 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 299 flow [2024-11-28 05:21:45,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-28 05:21:45,253 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2024-11-28 05:21:45,253 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 299 flow [2024-11-28 05:21:45,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:45,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:45,254 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:45,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:21:45,254 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 05:21:45,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:45,255 INFO L85 PathProgramCache]: Analyzing trace with hash -168543711, now seen corresponding path program 2 times [2024-11-28 05:21:45,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:45,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730326860] [2024-11-28 05:21:45,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:45,281 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:45,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:45,412 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 05:21:45,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730326860] [2024-11-28 05:21:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730326860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208239644] [2024-11-28 05:21:45,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:45,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:45,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:21:45,550 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:45,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:45,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:45,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:45,608 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 05:21:45,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:45,657 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 05:21:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208239644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:45,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-28 05:21:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885488808] [2024-11-28 05:21:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:45,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:21:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:45,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:21:45,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:21:45,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:46,174 INFO L124 PetriNetUnfolderBase]: 429/743 cut-off events. [2024-11-28 05:21:46,174 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2024-11-28 05:21:46,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2634 conditions, 743 events. 429/743 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3151 event pairs, 27 based on Foata normal form. 12/753 useless extension candidates. Maximal degree in co-relation 2606. Up to 148 conditions per place. [2024-11-28 05:21:46,180 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 89 selfloop transitions, 67 changer transitions 1/158 dead transitions. [2024-11-28 05:21:46,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 158 transitions, 1160 flow [2024-11-28 05:21:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:21:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:21:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-11-28 05:21:46,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2024-11-28 05:21:46,182 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 299 flow. Second operand 14 states and 135 transitions. [2024-11-28 05:21:46,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 158 transitions, 1160 flow [2024-11-28 05:21:46,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1104 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:46,192 INFO L231 Difference]: Finished difference. Result has 72 places, 104 transitions, 853 flow [2024-11-28 05:21:46,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=853, PETRI_PLACES=72, PETRI_TRANSITIONS=104} [2024-11-28 05:21:46,193 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-11-28 05:21:46,193 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 104 transitions, 853 flow [2024-11-28 05:21:46,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:46,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:46,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:46,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:46,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:46,397 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 05:21:46,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1498712254, now seen corresponding path program 3 times [2024-11-28 05:21:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917132889] [2024-11-28 05:21:46,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:46,428 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:21:46,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917132889] [2024-11-28 05:21:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917132889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:46,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801421537] [2024-11-28 05:21:46,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:46,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:46,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:46,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:46,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:46,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 104 transitions, 853 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:46,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:46,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:46,765 INFO L124 PetriNetUnfolderBase]: 420/753 cut-off events. [2024-11-28 05:21:46,765 INFO L125 PetriNetUnfolderBase]: For 2430/2436 co-relation queries the response was YES. [2024-11-28 05:21:46,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 753 events. 420/753 cut-off events. For 2430/2436 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3426 event pairs, 102 based on Foata normal form. 2/751 useless extension candidates. Maximal degree in co-relation 3228. Up to 436 conditions per place. [2024-11-28 05:21:46,776 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 86 selfloop transitions, 30 changer transitions 2/134 dead transitions. [2024-11-28 05:21:46,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 134 transitions, 1318 flow [2024-11-28 05:21:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-28 05:21:46,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 05:21:46,778 INFO L175 Difference]: Start difference. First operand has 72 places, 104 transitions, 853 flow. Second operand 5 states and 65 transitions. [2024-11-28 05:21:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 134 transitions, 1318 flow [2024-11-28 05:21:46,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 1260 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-11-28 05:21:46,796 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1011 flow [2024-11-28 05:21:46,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1011, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2024-11-28 05:21:46,797 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2024-11-28 05:21:46,797 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1011 flow [2024-11-28 05:21:46,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:46,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:46,798 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:46,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:21:46,798 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 05:21:46,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash -668533595, now seen corresponding path program 3 times [2024-11-28 05:21:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317934775] [2024-11-28 05:21:46,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:46,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 05:21:46,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:46,900 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 05:21:46,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317934775] [2024-11-28 05:21:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317934775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:46,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:46,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410184704] [2024-11-28 05:21:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:46,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:46,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:46,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:46,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:46,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 1011 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:46,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:46,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:46,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:47,157 INFO L124 PetriNetUnfolderBase]: 433/774 cut-off events. [2024-11-28 05:21:47,157 INFO L125 PetriNetUnfolderBase]: For 2763/2766 co-relation queries the response was YES. [2024-11-28 05:21:47,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3433 conditions, 774 events. 433/774 cut-off events. For 2763/2766 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3536 event pairs, 103 based on Foata normal form. 3/774 useless extension candidates. Maximal degree in co-relation 3393. Up to 406 conditions per place. [2024-11-28 05:21:47,165 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 85 selfloop transitions, 35 changer transitions 2/137 dead transitions. [2024-11-28 05:21:47,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 137 transitions, 1416 flow [2024-11-28 05:21:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-28 05:21:47,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 05:21:47,166 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1011 flow. Second operand 5 states and 65 transitions. [2024-11-28 05:21:47,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 137 transitions, 1416 flow [2024-11-28 05:21:47,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 1367 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:47,183 INFO L231 Difference]: Finished difference. Result has 84 places, 118 transitions, 1142 flow [2024-11-28 05:21:47,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1142, PETRI_PLACES=84, PETRI_TRANSITIONS=118} [2024-11-28 05:21:47,184 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 58 predicate places. [2024-11-28 05:21:47,184 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 118 transitions, 1142 flow [2024-11-28 05:21:47,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:47,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:47,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:47,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:21:47,184 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 05:21:47,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash -690359919, now seen corresponding path program 4 times [2024-11-28 05:21:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:47,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577409911] [2024-11-28 05:21:47,185 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:47,199 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:47,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:47,248 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 05:21:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577409911] [2024-11-28 05:21:47,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577409911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523301526] [2024-11-28 05:21:47,248 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:47,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:47,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:21:47,340 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:47,341 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:47,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:47,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:47,397 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 05:21:47,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:47,435 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 05:21:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523301526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:47,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-28 05:21:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954660092] [2024-11-28 05:21:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:47,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:21:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:47,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:21:47,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:21:47,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:47,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 118 transitions, 1142 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:47,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:47,847 INFO L124 PetriNetUnfolderBase]: 502/868 cut-off events. [2024-11-28 05:21:47,847 INFO L125 PetriNetUnfolderBase]: For 3538/3538 co-relation queries the response was YES. [2024-11-28 05:21:47,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 868 events. 502/868 cut-off events. For 3538/3538 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3900 event pairs, 88 based on Foata normal form. 12/878 useless extension candidates. Maximal degree in co-relation 3917. Up to 360 conditions per place. [2024-11-28 05:21:47,856 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 106 selfloop transitions, 56 changer transitions 0/163 dead transitions. [2024-11-28 05:21:47,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1711 flow [2024-11-28 05:21:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:21:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:21:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-11-28 05:21:47,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-11-28 05:21:47,857 INFO L175 Difference]: Start difference. First operand has 84 places, 118 transitions, 1142 flow. Second operand 9 states and 100 transitions. [2024-11-28 05:21:47,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1711 flow [2024-11-28 05:21:47,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 163 transitions, 1652 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:47,880 INFO L231 Difference]: Finished difference. Result has 94 places, 129 transitions, 1350 flow [2024-11-28 05:21:47,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1350, PETRI_PLACES=94, PETRI_TRANSITIONS=129} [2024-11-28 05:21:47,881 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 68 predicate places. [2024-11-28 05:21:47,881 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 129 transitions, 1350 flow [2024-11-28 05:21:47,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:47,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:47,882 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:47,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:48,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:48,082 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 05:21:48,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1011564984, now seen corresponding path program 4 times [2024-11-28 05:21:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:48,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726111034] [2024-11-28 05:21:48,083 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:48,096 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:48,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726111034] [2024-11-28 05:21:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726111034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:48,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:48,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:48,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920445040] [2024-11-28 05:21:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:48,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:48,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:48,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:48,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:48,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 129 transitions, 1350 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 05:21:48,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:48,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:48,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:48,427 INFO L124 PetriNetUnfolderBase]: 503/871 cut-off events. [2024-11-28 05:21:48,427 INFO L125 PetriNetUnfolderBase]: For 4171/4171 co-relation queries the response was YES. [2024-11-28 05:21:48,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 871 events. 503/871 cut-off events. For 4171/4171 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3906 event pairs, 134 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 4164. Up to 450 conditions per place. [2024-11-28 05:21:48,437 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 118 selfloop transitions, 29 changer transitions 4/152 dead transitions. [2024-11-28 05:21:48,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 152 transitions, 1817 flow [2024-11-28 05:21:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-28 05:21:48,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-11-28 05:21:48,439 INFO L175 Difference]: Start difference. First operand has 94 places, 129 transitions, 1350 flow. Second operand 5 states and 60 transitions. [2024-11-28 05:21:48,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 152 transitions, 1817 flow [2024-11-28 05:21:48,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 152 transitions, 1817 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 05:21:48,462 INFO L231 Difference]: Finished difference. Result has 100 places, 129 transitions, 1419 flow [2024-11-28 05:21:48,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1419, PETRI_PLACES=100, PETRI_TRANSITIONS=129} [2024-11-28 05:21:48,463 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 74 predicate places. [2024-11-28 05:21:48,464 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 129 transitions, 1419 flow [2024-11-28 05:21:48,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 05:21:48,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:48,465 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:48,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:21:48,465 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 05:21:48,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -509690388, now seen corresponding path program 5 times [2024-11-28 05:21:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201007545] [2024-11-28 05:21:48,466 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:21:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:48,493 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:48,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:48,572 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 05:21:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201007545] [2024-11-28 05:21:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201007545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464542521] [2024-11-28 05:21:48,573 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:21:48,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:48,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:21:48,675 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:48,675 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:48,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:48,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:48,739 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 05:21:48,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:48,777 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 05:21:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464542521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:48,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 05:21:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242700505] [2024-11-28 05:21:48,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:48,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:21:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:48,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:21:48,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:21:48,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:48,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 129 transitions, 1419 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 05:21:48,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:48,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:48,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:49,176 INFO L124 PetriNetUnfolderBase]: 561/976 cut-off events. [2024-11-28 05:21:49,176 INFO L125 PetriNetUnfolderBase]: For 5449/5449 co-relation queries the response was YES. [2024-11-28 05:21:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4762 conditions, 976 events. 561/976 cut-off events. For 5449/5449 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4578 event pairs, 54 based on Foata normal form. 13/987 useless extension candidates. Maximal degree in co-relation 4714. Up to 266 conditions per place. [2024-11-28 05:21:49,187 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 105 selfloop transitions, 66 changer transitions 0/172 dead transitions. [2024-11-28 05:21:49,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 172 transitions, 2058 flow [2024-11-28 05:21:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-11-28 05:21:49,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2024-11-28 05:21:49,188 INFO L175 Difference]: Start difference. First operand has 100 places, 129 transitions, 1419 flow. Second operand 8 states and 83 transitions. [2024-11-28 05:21:49,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 172 transitions, 2058 flow [2024-11-28 05:21:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 172 transitions, 1991 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:49,215 INFO L231 Difference]: Finished difference. Result has 107 places, 142 transitions, 1725 flow [2024-11-28 05:21:49,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1725, PETRI_PLACES=107, PETRI_TRANSITIONS=142} [2024-11-28 05:21:49,216 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2024-11-28 05:21:49,216 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 142 transitions, 1725 flow [2024-11-28 05:21:49,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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 05:21:49,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:49,217 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:49,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:21:49,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:21:49,421 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 05:21:49,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1571034307, now seen corresponding path program 5 times [2024-11-28 05:21:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:49,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614955951] [2024-11-28 05:21:49,423 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:21:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:49,440 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:49,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:49,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:49,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614955951] [2024-11-28 05:21:49,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614955951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:49,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:49,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422167447] [2024-11-28 05:21:49,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:49,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:49,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:49,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:49,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:49,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 142 transitions, 1725 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:49,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:49,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:49,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:49,840 INFO L124 PetriNetUnfolderBase]: 507/907 cut-off events. [2024-11-28 05:21:49,840 INFO L125 PetriNetUnfolderBase]: For 6604/6620 co-relation queries the response was YES. [2024-11-28 05:21:49,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 907 events. 507/907 cut-off events. For 6604/6620 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4432 event pairs, 125 based on Foata normal form. 3/897 useless extension candidates. Maximal degree in co-relation 4787. Up to 567 conditions per place. [2024-11-28 05:21:49,854 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 107 selfloop transitions, 30 changer transitions 4/162 dead transitions. [2024-11-28 05:21:49,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 2128 flow [2024-11-28 05:21:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-28 05:21:49,855 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-11-28 05:21:49,855 INFO L175 Difference]: Start difference. First operand has 107 places, 142 transitions, 1725 flow. Second operand 5 states and 64 transitions. [2024-11-28 05:21:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 2128 flow [2024-11-28 05:21:49,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 162 transitions, 2114 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:49,889 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1760 flow [2024-11-28 05:21:49,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1760, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-11-28 05:21:49,894 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 84 predicate places. [2024-11-28 05:21:49,894 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1760 flow [2024-11-28 05:21:49,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:49,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:49,894 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:49,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 05:21:49,895 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 05:21:49,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash 430807993, now seen corresponding path program 6 times [2024-11-28 05:21:49,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:49,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82803456] [2024-11-28 05:21:49,895 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:21:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:49,914 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:21:49,914 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:50,007 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 05:21:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82803456] [2024-11-28 05:21:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82803456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723660900] [2024-11-28 05:21:50,008 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:21:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:50,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:21:50,113 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:21:50,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:50,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:50,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:50,166 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 05:21:50,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:50,205 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 05:21:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723660900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:50,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-28 05:21:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078437834] [2024-11-28 05:21:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:50,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:21:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:50,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:21:50,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:21:50,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:50,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1760 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:50,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:50,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:50,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:50,737 INFO L124 PetriNetUnfolderBase]: 582/1007 cut-off events. [2024-11-28 05:21:50,737 INFO L125 PetriNetUnfolderBase]: For 7302/7302 co-relation queries the response was YES. [2024-11-28 05:21:50,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5325 conditions, 1007 events. 582/1007 cut-off events. For 7302/7302 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4685 event pairs, 47 based on Foata normal form. 16/1021 useless extension candidates. Maximal degree in co-relation 5274. Up to 216 conditions per place. [2024-11-28 05:21:50,750 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 112 selfloop transitions, 93 changer transitions 1/207 dead transitions. [2024-11-28 05:21:50,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 2585 flow [2024-11-28 05:21:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:21:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:21:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 153 transitions. [2024-11-28 05:21:50,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-11-28 05:21:50,752 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1760 flow. Second operand 15 states and 153 transitions. [2024-11-28 05:21:50,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 2585 flow [2024-11-28 05:21:50,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 207 transitions, 2513 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:50,790 INFO L231 Difference]: Finished difference. Result has 121 places, 153 transitions, 2029 flow [2024-11-28 05:21:50,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2029, PETRI_PLACES=121, PETRI_TRANSITIONS=153} [2024-11-28 05:21:50,791 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 95 predicate places. [2024-11-28 05:21:50,792 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 153 transitions, 2029 flow [2024-11-28 05:21:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:50,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:50,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:50,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:21:50,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:21:50,996 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 05:21:50,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1675087130, now seen corresponding path program 6 times [2024-11-28 05:21:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:50,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113874392] [2024-11-28 05:21:50,997 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:21:50,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:51,026 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:21:51,026 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:51,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:51,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113874392] [2024-11-28 05:21:51,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113874392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:51,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:51,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:21:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222415701] [2024-11-28 05:21:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:51,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:51,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:51,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:21:51,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-11-28 05:21:51,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 153 transitions, 2029 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:51,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:51,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-11-28 05:21:51,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:51,447 INFO L124 PetriNetUnfolderBase]: 514/917 cut-off events. [2024-11-28 05:21:51,448 INFO L125 PetriNetUnfolderBase]: For 7912/7929 co-relation queries the response was YES. [2024-11-28 05:21:51,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 917 events. 514/917 cut-off events. For 7912/7929 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4487 event pairs, 129 based on Foata normal form. 2/903 useless extension candidates. Maximal degree in co-relation 5087. Up to 488 conditions per place. [2024-11-28 05:21:51,460 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 103 selfloop transitions, 35 changer transitions 2/166 dead transitions. [2024-11-28 05:21:51,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 2366 flow [2024-11-28 05:21:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-28 05:21:51,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-11-28 05:21:51,462 INFO L175 Difference]: Start difference. First operand has 121 places, 153 transitions, 2029 flow. Second operand 5 states and 60 transitions. [2024-11-28 05:21:51,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 2366 flow [2024-11-28 05:21:51,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 166 transitions, 2261 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-28 05:21:51,505 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1986 flow [2024-11-28 05:21:51,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1986, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2024-11-28 05:21:51,507 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2024-11-28 05:21:51,508 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1986 flow [2024-11-28 05:21:51,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 05:21:51,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:51,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:51,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 05:21:51,508 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 05:21:51,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1715672772, now seen corresponding path program 7 times [2024-11-28 05:21:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:51,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028986034] [2024-11-28 05:21:51,511 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:21:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:51,670 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 05:21:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028986034] [2024-11-28 05:21:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028986034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443389223] [2024-11-28 05:21:51,671 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:21:51,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:51,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:51,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:21:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:51,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:21:51,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:51,832 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 05:21:51,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:51,864 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 05:21:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443389223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:51,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:51,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-28 05:21:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540812290] [2024-11-28 05:21:51,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:51,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:21:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:51,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:21:51,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:21:51,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:51,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1986 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:51,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:52,286 INFO L124 PetriNetUnfolderBase]: 560/958 cut-off events. [2024-11-28 05:21:52,286 INFO L125 PetriNetUnfolderBase]: For 7400/7400 co-relation queries the response was YES. [2024-11-28 05:21:52,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5264 conditions, 958 events. 560/958 cut-off events. For 7400/7400 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4352 event pairs, 97 based on Foata normal form. 9/965 useless extension candidates. Maximal degree in co-relation 5214. Up to 330 conditions per place. [2024-11-28 05:21:52,300 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 117 selfloop transitions, 62 changer transitions 1/181 dead transitions. [2024-11-28 05:21:52,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 181 transitions, 2503 flow [2024-11-28 05:21:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-11-28 05:21:52,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-11-28 05:21:52,303 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1986 flow. Second operand 8 states and 92 transitions. [2024-11-28 05:21:52,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 181 transitions, 2503 flow [2024-11-28 05:21:52,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 2433 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:52,344 INFO L231 Difference]: Finished difference. Result has 122 places, 152 transitions, 2026 flow [2024-11-28 05:21:52,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2026, PETRI_PLACES=122, PETRI_TRANSITIONS=152} [2024-11-28 05:21:52,345 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2024-11-28 05:21:52,346 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 152 transitions, 2026 flow [2024-11-28 05:21:52,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:52,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:52,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:52,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:52,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:21:52,547 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 05:21:52,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2118806673, now seen corresponding path program 1 times [2024-11-28 05:21:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:52,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875078798] [2024-11-28 05:21:52,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875078798] [2024-11-28 05:21:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875078798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:21:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985670736] [2024-11-28 05:21:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:52,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:52,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:52,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:52,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-28 05:21:52,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 152 transitions, 2026 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:52,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:52,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-28 05:21:52,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:52,921 INFO L124 PetriNetUnfolderBase]: 457/878 cut-off events. [2024-11-28 05:21:52,921 INFO L125 PetriNetUnfolderBase]: For 8063/8088 co-relation queries the response was YES. [2024-11-28 05:21:52,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 878 events. 457/878 cut-off events. For 8063/8088 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4515 event pairs, 194 based on Foata normal form. 23/887 useless extension candidates. Maximal degree in co-relation 5018. Up to 672 conditions per place. [2024-11-28 05:21:52,933 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 101 selfloop transitions, 2 changer transitions 11/164 dead transitions. [2024-11-28 05:21:52,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 164 transitions, 2393 flow [2024-11-28 05:21:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-11-28 05:21:52,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-11-28 05:21:52,935 INFO L175 Difference]: Start difference. First operand has 122 places, 152 transitions, 2026 flow. Second operand 4 states and 50 transitions. [2024-11-28 05:21:52,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 164 transitions, 2393 flow [2024-11-28 05:21:52,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 164 transitions, 2192 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-11-28 05:21:52,976 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1854 flow [2024-11-28 05:21:52,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1854, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2024-11-28 05:21:52,978 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 88 predicate places. [2024-11-28 05:21:52,979 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1854 flow [2024-11-28 05:21:52,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:52,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:52,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:52,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:21:52,979 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 05:21:52,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1955313664, now seen corresponding path program 1 times [2024-11-28 05:21:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047671312] [2024-11-28 05:21:52,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:53,437 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 05:21:53,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047671312] [2024-11-28 05:21:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047671312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119814909] [2024-11-28 05:21:53,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:53,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:53,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:21:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:53,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:21:53,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:53,637 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 05:21:53,637 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:53,671 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 36 treesize of output 12 [2024-11-28 05:21:53,740 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 05:21:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119814909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:53,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-28 05:21:53,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463084534] [2024-11-28 05:21:53,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:53,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:21:53,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:53,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:21:53,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:21:53,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-28 05:21:53,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 1854 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 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 05:21:53,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:53,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-28 05:21:53,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:54,348 INFO L124 PetriNetUnfolderBase]: 1305/2399 cut-off events. [2024-11-28 05:21:54,348 INFO L125 PetriNetUnfolderBase]: For 17942/18099 co-relation queries the response was YES. [2024-11-28 05:21:54,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12658 conditions, 2399 events. 1305/2399 cut-off events. For 17942/18099 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14891 event pairs, 171 based on Foata normal form. 60/2448 useless extension candidates. Maximal degree in co-relation 11076. Up to 627 conditions per place. [2024-11-28 05:21:54,371 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 327 selfloop transitions, 14 changer transitions 19/410 dead transitions. [2024-11-28 05:21:54,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 410 transitions, 5829 flow [2024-11-28 05:21:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:21:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:21:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-11-28 05:21:54,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-11-28 05:21:54,375 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1854 flow. Second operand 9 states and 125 transitions. [2024-11-28 05:21:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 410 transitions, 5829 flow [2024-11-28 05:21:54,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 410 transitions, 5813 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:54,442 INFO L231 Difference]: Finished difference. Result has 123 places, 166 transitions, 1963 flow [2024-11-28 05:21:54,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1963, PETRI_PLACES=123, PETRI_TRANSITIONS=166} [2024-11-28 05:21:54,443 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 97 predicate places. [2024-11-28 05:21:54,444 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 166 transitions, 1963 flow [2024-11-28 05:21:54,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 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 05:21:54,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:54,444 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:54,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:54,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:21:54,649 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 05:21:54,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 393517564, now seen corresponding path program 2 times [2024-11-28 05:21:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:54,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362030836] [2024-11-28 05:21:54,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:54,686 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:21:54,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362030836] [2024-11-28 05:21:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362030836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:21:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751855713] [2024-11-28 05:21:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:54,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:54,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:54,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:54,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-28 05:21:54,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 166 transitions, 1963 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:21:54,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:54,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-28 05:21:54,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:55,563 INFO L124 PetriNetUnfolderBase]: 1804/3304 cut-off events. [2024-11-28 05:21:55,564 INFO L125 PetriNetUnfolderBase]: For 25701/25921 co-relation queries the response was YES. [2024-11-28 05:21:55,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18110 conditions, 3304 events. 1804/3304 cut-off events. For 25701/25921 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21162 event pairs, 194 based on Foata normal form. 100/3392 useless extension candidates. Maximal degree in co-relation 15205. Up to 1896 conditions per place. [2024-11-28 05:21:55,596 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 205 selfloop transitions, 13 changer transitions 1/269 dead transitions. [2024-11-28 05:21:55,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 3650 flow [2024-11-28 05:21:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-28 05:21:55,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-28 05:21:55,598 INFO L175 Difference]: Start difference. First operand has 123 places, 166 transitions, 1963 flow. Second operand 4 states and 65 transitions. [2024-11-28 05:21:55,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 3650 flow [2024-11-28 05:21:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 3618 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:55,694 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 2040 flow [2024-11-28 05:21:55,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2040, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-11-28 05:21:55,695 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 101 predicate places. [2024-11-28 05:21:55,696 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 2040 flow [2024-11-28 05:21:55,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 05:21:55,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:55,696 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:55,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 05:21:55,696 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 05:21:55,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1242721788, now seen corresponding path program 3 times [2024-11-28 05:21:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103669974] [2024-11-28 05:21:55,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:55,742 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:21:55,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:55,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:55,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103669974] [2024-11-28 05:21:55,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103669974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:55,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971629308] [2024-11-28 05:21:55,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:55,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:55,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:55,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:55,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:21:56,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:21:56,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:56,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:21:56,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:56,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:56,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971629308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:56,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:56,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 05:21:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566371970] [2024-11-28 05:21:56,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:56,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:21:56,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:56,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:21:56,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:21:56,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:56,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 2040 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 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 05:21:56,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:56,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:56,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:58,392 INFO L124 PetriNetUnfolderBase]: 3216/5381 cut-off events. [2024-11-28 05:21:58,392 INFO L125 PetriNetUnfolderBase]: For 36754/36754 co-relation queries the response was YES. [2024-11-28 05:21:58,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29576 conditions, 5381 events. 3216/5381 cut-off events. For 36754/36754 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32618 event pairs, 111 based on Foata normal form. 144/5525 useless extension candidates. Maximal degree in co-relation 26110. Up to 976 conditions per place. [2024-11-28 05:21:58,471 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 304 selfloop transitions, 144 changer transitions 8/457 dead transitions. [2024-11-28 05:21:58,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 457 transitions, 5215 flow [2024-11-28 05:21:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:21:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 05:21:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-11-28 05:21:58,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3806366047745358 [2024-11-28 05:21:58,474 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 2040 flow. Second operand 29 states and 287 transitions. [2024-11-28 05:21:58,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 457 transitions, 5215 flow [2024-11-28 05:21:58,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 457 transitions, 5195 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-28 05:21:58,676 INFO L231 Difference]: Finished difference. Result has 172 places, 232 transitions, 3268 flow [2024-11-28 05:21:58,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3268, PETRI_PLACES=172, PETRI_TRANSITIONS=232} [2024-11-28 05:21:58,677 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 146 predicate places. [2024-11-28 05:21:58,677 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 232 transitions, 3268 flow [2024-11-28 05:21:58,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 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 05:21:58,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:58,679 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:58,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:58,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:58,883 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 05:21:58,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash 320031982, now seen corresponding path program 4 times [2024-11-28 05:21:58,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:58,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499554997] [2024-11-28 05:21:58,884 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:58,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:58,913 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:58,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499554997] [2024-11-28 05:21:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499554997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122195873] [2024-11-28 05:21:59,029 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:21:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:59,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:59,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:21:59,160 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:21:59,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:59,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:21:59,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:59,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122195873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:59,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:59,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-28 05:21:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761598992] [2024-11-28 05:21:59,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:59,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:21:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:59,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:21:59,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:21:59,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:21:59,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 232 transitions, 3268 flow. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 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 05:21:59,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:59,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:21:59,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:01,799 INFO L124 PetriNetUnfolderBase]: 4431/7400 cut-off events. [2024-11-28 05:22:01,799 INFO L125 PetriNetUnfolderBase]: For 89577/89577 co-relation queries the response was YES. [2024-11-28 05:22:01,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47735 conditions, 7400 events. 4431/7400 cut-off events. For 89577/89577 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 46712 event pairs, 202 based on Foata normal form. 46/7446 useless extension candidates. Maximal degree in co-relation 45004. Up to 1429 conditions per place. [2024-11-28 05:22:01,889 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 232 selfloop transitions, 203 changer transitions 9/445 dead transitions. [2024-11-28 05:22:01,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 445 transitions, 6493 flow [2024-11-28 05:22:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:22:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:22:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-11-28 05:22:01,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38974358974358975 [2024-11-28 05:22:01,891 INFO L175 Difference]: Start difference. First operand has 172 places, 232 transitions, 3268 flow. Second operand 15 states and 152 transitions. [2024-11-28 05:22:01,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 445 transitions, 6493 flow [2024-11-28 05:22:02,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 445 transitions, 6105 flow, removed 141 selfloop flow, removed 4 redundant places. [2024-11-28 05:22:02,672 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 4836 flow [2024-11-28 05:22:02,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4836, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-11-28 05:22:02,672 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 163 predicate places. [2024-11-28 05:22:02,672 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 4836 flow [2024-11-28 05:22:02,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 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 05:22:02,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:02,673 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:02,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:22:02,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:02,873 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 05:22:02,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1532565794, now seen corresponding path program 5 times [2024-11-28 05:22:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823473375] [2024-11-28 05:22:02,874 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:22:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:02,905 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:22:02,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823473375] [2024-11-28 05:22:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823473375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831274845] [2024-11-28 05:22:03,012 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:22:03,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:03,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:03,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:22:03,153 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 05:22:03,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:03,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:03,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:03,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831274845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:03,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:03,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 05:22:03,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213414810] [2024-11-28 05:22:03,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:03,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:22:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:03,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:22:03,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:22:03,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:03,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 4836 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 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 05:22:03,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:03,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:06,635 INFO L124 PetriNetUnfolderBase]: 5836/9717 cut-off events. [2024-11-28 05:22:06,635 INFO L125 PetriNetUnfolderBase]: For 145313/145313 co-relation queries the response was YES. [2024-11-28 05:22:06,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66758 conditions, 9717 events. 5836/9717 cut-off events. For 145313/145313 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 63109 event pairs, 227 based on Foata normal form. 100/9817 useless extension candidates. Maximal degree in co-relation 63047. Up to 2165 conditions per place. [2024-11-28 05:22:06,762 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 256 selfloop transitions, 270 changer transitions 6/533 dead transitions. [2024-11-28 05:22:06,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 533 transitions, 8428 flow [2024-11-28 05:22:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:22:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:22:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-11-28 05:22:06,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-11-28 05:22:06,765 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 4836 flow. Second operand 16 states and 168 transitions. [2024-11-28 05:22:06,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 533 transitions, 8428 flow [2024-11-28 05:22:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 533 transitions, 8320 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-11-28 05:22:08,161 INFO L231 Difference]: Finished difference. Result has 213 places, 390 transitions, 7102 flow [2024-11-28 05:22:08,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7102, PETRI_PLACES=213, PETRI_TRANSITIONS=390} [2024-11-28 05:22:08,161 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 187 predicate places. [2024-11-28 05:22:08,161 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 390 transitions, 7102 flow [2024-11-28 05:22:08,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 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 05:22:08,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:08,162 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:08,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:22:08,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:08,362 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 05:22:08,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -886572250, now seen corresponding path program 6 times [2024-11-28 05:22:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010356226] [2024-11-28 05:22:08,363 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:22:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:08,389 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:22:08,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010356226] [2024-11-28 05:22:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010356226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250532649] [2024-11-28 05:22:08,513 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:22:08,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:08,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:22:08,651 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:22:08,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:08,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:08,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:08,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250532649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:08,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 05:22:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564494776] [2024-11-28 05:22:08,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:08,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:22:08,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:08,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:22:08,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:22:08,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:08,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 390 transitions, 7102 flow. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:08,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:08,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:08,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:12,983 INFO L124 PetriNetUnfolderBase]: 7058/11752 cut-off events. [2024-11-28 05:22:12,983 INFO L125 PetriNetUnfolderBase]: For 247554/247554 co-relation queries the response was YES. [2024-11-28 05:22:13,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90260 conditions, 11752 events. 7058/11752 cut-off events. For 247554/247554 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 78614 event pairs, 284 based on Foata normal form. 76/11828 useless extension candidates. Maximal degree in co-relation 86256. Up to 2099 conditions per place. [2024-11-28 05:22:13,166 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 356 selfloop transitions, 343 changer transitions 4/704 dead transitions. [2024-11-28 05:22:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 704 transitions, 12245 flow [2024-11-28 05:22:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:22:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:22:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 261 transitions. [2024-11-28 05:22:13,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.386094674556213 [2024-11-28 05:22:13,168 INFO L175 Difference]: Start difference. First operand has 213 places, 390 transitions, 7102 flow. Second operand 26 states and 261 transitions. [2024-11-28 05:22:13,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 704 transitions, 12245 flow [2024-11-28 05:22:16,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 704 transitions, 12111 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-11-28 05:22:16,205 INFO L231 Difference]: Finished difference. Result has 247 places, 477 transitions, 9997 flow [2024-11-28 05:22:16,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6970, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9997, PETRI_PLACES=247, PETRI_TRANSITIONS=477} [2024-11-28 05:22:16,206 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 221 predicate places. [2024-11-28 05:22:16,206 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 477 transitions, 9997 flow [2024-11-28 05:22:16,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:22:16,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:16,206 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:16,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:22:16,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:16,407 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 05:22:16,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1743068848, now seen corresponding path program 7 times [2024-11-28 05:22:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 05:22:16,408 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:22:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137551041] [2024-11-28 05:22:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137551041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129833440] [2024-11-28 05:22:16,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:22:16,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:16,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:16,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:22:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:16,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:16,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:16,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:16,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129833440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:16,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:16,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 05:22:16,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711757422] [2024-11-28 05:22:16,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:16,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:22:16,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:16,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:22:16,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:22:16,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:16,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 477 transitions, 9997 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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 05:22:16,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:16,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:21,465 INFO L124 PetriNetUnfolderBase]: 7078/11812 cut-off events. [2024-11-28 05:22:21,465 INFO L125 PetriNetUnfolderBase]: For 318574/318574 co-relation queries the response was YES. [2024-11-28 05:22:21,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100789 conditions, 11812 events. 7078/11812 cut-off events. For 318574/318574 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 79734 event pairs, 793 based on Foata normal form. 22/11834 useless extension candidates. Maximal degree in co-relation 96563. Up to 3283 conditions per place. [2024-11-28 05:22:21,666 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 405 selfloop transitions, 221 changer transitions 6/633 dead transitions. [2024-11-28 05:22:21,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 633 transitions, 12771 flow [2024-11-28 05:22:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:22:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:22:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-11-28 05:22:21,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4319526627218935 [2024-11-28 05:22:21,668 INFO L175 Difference]: Start difference. First operand has 247 places, 477 transitions, 9997 flow. Second operand 13 states and 146 transitions. [2024-11-28 05:22:21,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 633 transitions, 12771 flow [2024-11-28 05:22:25,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 633 transitions, 12232 flow, removed 215 selfloop flow, removed 9 redundant places. [2024-11-28 05:22:25,942 INFO L231 Difference]: Finished difference. Result has 252 places, 476 transitions, 9902 flow [2024-11-28 05:22:25,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9902, PETRI_PLACES=252, PETRI_TRANSITIONS=476} [2024-11-28 05:22:25,943 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 226 predicate places. [2024-11-28 05:22:25,943 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 476 transitions, 9902 flow [2024-11-28 05:22:25,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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 05:22:25,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:25,944 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:25,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:22:26,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 05:22:26,148 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 05:22:26,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash 52519842, now seen corresponding path program 8 times [2024-11-28 05:22:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:26,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241308690] [2024-11-28 05:22:26,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:26,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:26,186 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:26,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:26,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241308690] [2024-11-28 05:22:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241308690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525811738] [2024-11-28 05:22:26,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:26,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:26,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:26,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:26,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:22:26,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:26,463 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:26,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:26,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:26,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:26,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525811738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:26,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:26,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-28 05:22:26,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373380225] [2024-11-28 05:22:26,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:26,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:22:26,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:26,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:22:26,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:22:26,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:26,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 476 transitions, 9902 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 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 05:22:26,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:26,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:26,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:31,993 INFO L124 PetriNetUnfolderBase]: 8130/13448 cut-off events. [2024-11-28 05:22:31,993 INFO L125 PetriNetUnfolderBase]: For 345609/345609 co-relation queries the response was YES. [2024-11-28 05:22:32,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114682 conditions, 13448 events. 8130/13448 cut-off events. For 345609/345609 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 91236 event pairs, 514 based on Foata normal form. 70/13518 useless extension candidates. Maximal degree in co-relation 114132. Up to 2718 conditions per place. [2024-11-28 05:22:32,410 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 364 selfloop transitions, 423 changer transitions 4/792 dead transitions. [2024-11-28 05:22:32,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 792 transitions, 15472 flow [2024-11-28 05:22:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:22:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:22:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 255 transitions. [2024-11-28 05:22:32,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3772189349112426 [2024-11-28 05:22:32,412 INFO L175 Difference]: Start difference. First operand has 252 places, 476 transitions, 9902 flow. Second operand 26 states and 255 transitions. [2024-11-28 05:22:32,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 792 transitions, 15472 flow [2024-11-28 05:22:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 792 transitions, 15037 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-28 05:22:36,550 INFO L231 Difference]: Finished difference. Result has 277 places, 565 transitions, 13075 flow [2024-11-28 05:22:36,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9506, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13075, PETRI_PLACES=277, PETRI_TRANSITIONS=565} [2024-11-28 05:22:36,551 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 251 predicate places. [2024-11-28 05:22:36,551 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 565 transitions, 13075 flow [2024-11-28 05:22:36,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 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 05:22:36,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:36,552 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:36,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:22:36,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:36,752 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 05:22:36,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2119152622, now seen corresponding path program 9 times [2024-11-28 05:22:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:36,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217803366] [2024-11-28 05:22:36,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:22:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:36,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:22:36,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217803366] [2024-11-28 05:22:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217803366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13387381] [2024-11-28 05:22:36,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:22:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:36,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:36,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:22:37,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:22:37,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:37,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:37,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:37,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13387381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:37,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 05:22:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714500487] [2024-11-28 05:22:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:37,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:22:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:37,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:22:37,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:22:37,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:37,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 565 transitions, 13075 flow. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 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 05:22:37,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:37,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:37,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:43,472 INFO L124 PetriNetUnfolderBase]: 8821/14521 cut-off events. [2024-11-28 05:22:43,472 INFO L125 PetriNetUnfolderBase]: For 476335/476335 co-relation queries the response was YES. [2024-11-28 05:22:43,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135447 conditions, 14521 events. 8821/14521 cut-off events. For 476335/476335 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 99254 event pairs, 933 based on Foata normal form. 30/14551 useless extension candidates. Maximal degree in co-relation 133898. Up to 3885 conditions per place. [2024-11-28 05:22:43,727 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 478 selfloop transitions, 272 changer transitions 16/767 dead transitions. [2024-11-28 05:22:43,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 767 transitions, 17035 flow [2024-11-28 05:22:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:22:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:22:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 165 transitions. [2024-11-28 05:22:43,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-11-28 05:22:43,729 INFO L175 Difference]: Start difference. First operand has 277 places, 565 transitions, 13075 flow. Second operand 16 states and 165 transitions. [2024-11-28 05:22:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 767 transitions, 17035 flow [2024-11-28 05:22:51,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 767 transitions, 16426 flow, removed 204 selfloop flow, removed 9 redundant places. [2024-11-28 05:22:51,025 INFO L231 Difference]: Finished difference. Result has 289 places, 582 transitions, 13732 flow [2024-11-28 05:22:51,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12602, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13732, PETRI_PLACES=289, PETRI_TRANSITIONS=582} [2024-11-28 05:22:51,026 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 263 predicate places. [2024-11-28 05:22:51,026 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 582 transitions, 13732 flow [2024-11-28 05:22:51,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 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 05:22:51,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:51,026 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:51,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:22:51,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:51,227 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 05:22:51,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1896512139, now seen corresponding path program 10 times [2024-11-28 05:22:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:51,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676120076] [2024-11-28 05:22:51,228 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:22:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:51,244 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:22:51,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:51,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676120076] [2024-11-28 05:22:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676120076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070816923] [2024-11-28 05:22:51,312 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:22:51,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:51,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:51,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:22:51,434 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:22:51,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:51,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:22:51,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:51,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:22:51,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070816923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:51,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:51,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-28 05:22:51,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915692026] [2024-11-28 05:22:51,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:51,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:22:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:51,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:22:51,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:22:51,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:22:51,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 582 transitions, 13732 flow. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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 05:22:51,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:51,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:22:51,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:58,631 INFO L124 PetriNetUnfolderBase]: 9854/16220 cut-off events. [2024-11-28 05:22:58,631 INFO L125 PetriNetUnfolderBase]: For 559239/559239 co-relation queries the response was YES. [2024-11-28 05:22:58,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152068 conditions, 16220 events. 9854/16220 cut-off events. For 559239/559239 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 112898 event pairs, 1811 based on Foata normal form. 288/16508 useless extension candidates. Maximal degree in co-relation 151274. Up to 7240 conditions per place. [2024-11-28 05:22:58,910 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 680 selfloop transitions, 194 changer transitions 0/875 dead transitions. [2024-11-28 05:22:58,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 875 transitions, 20093 flow [2024-11-28 05:22:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:22:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:22:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 208 transitions. [2024-11-28 05:22:58,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 05:22:58,912 INFO L175 Difference]: Start difference. First operand has 289 places, 582 transitions, 13732 flow. Second operand 20 states and 208 transitions. [2024-11-28 05:22:58,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 875 transitions, 20093 flow [2024-11-28 05:23:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 875 transitions, 19755 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-11-28 05:23:07,202 INFO L231 Difference]: Finished difference. Result has 309 places, 639 transitions, 15760 flow [2024-11-28 05:23:07,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=13308, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15760, PETRI_PLACES=309, PETRI_TRANSITIONS=639} [2024-11-28 05:23:07,204 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 283 predicate places. [2024-11-28 05:23:07,204 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 639 transitions, 15760 flow [2024-11-28 05:23:07,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 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 05:23:07,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:07,204 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:07,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:07,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:07,405 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 05:23:07,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2044777988, now seen corresponding path program 11 times [2024-11-28 05:23:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656318695] [2024-11-28 05:23:07,405 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:23:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:07,428 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:07,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656318695] [2024-11-28 05:23:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656318695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:07,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044478650] [2024-11-28 05:23:07,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:23:07,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:07,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:07,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:07,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:23:07,750 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:07,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:07,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:23:07,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:07,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044478650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:07,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:07,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 05:23:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051958604] [2024-11-28 05:23:07,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:07,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:23:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:07,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:23:07,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:07,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:23:07,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 639 transitions, 15760 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:23:07,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:07,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:23:07,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:16,490 INFO L124 PetriNetUnfolderBase]: 10748/17631 cut-off events. [2024-11-28 05:23:16,491 INFO L125 PetriNetUnfolderBase]: For 701075/701075 co-relation queries the response was YES. [2024-11-28 05:23:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174869 conditions, 17631 events. 10748/17631 cut-off events. For 701075/701075 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 123776 event pairs, 1634 based on Foata normal form. 144/17775 useless extension candidates. Maximal degree in co-relation 172990. Up to 8093 conditions per place. [2024-11-28 05:23:16,819 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 539 selfloop transitions, 312 changer transitions 5/857 dead transitions. [2024-11-28 05:23:16,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 857 transitions, 20598 flow [2024-11-28 05:23:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:23:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:23:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 211 transitions. [2024-11-28 05:23:16,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40576923076923077 [2024-11-28 05:23:16,821 INFO L175 Difference]: Start difference. First operand has 309 places, 639 transitions, 15760 flow. Second operand 20 states and 211 transitions. [2024-11-28 05:23:16,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 857 transitions, 20598 flow [2024-11-28 05:23:29,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 857 transitions, 19983 flow, removed 263 selfloop flow, removed 8 redundant places. [2024-11-28 05:23:29,937 INFO L231 Difference]: Finished difference. Result has 332 places, 677 transitions, 17623 flow [2024-11-28 05:23:29,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15147, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17623, PETRI_PLACES=332, PETRI_TRANSITIONS=677} [2024-11-28 05:23:29,939 INFO L279 CegarLoopForPetriNet]: 26 programPoint places, 306 predicate places. [2024-11-28 05:23:29,939 INFO L471 AbstractCegarLoop]: Abstraction has has 332 places, 677 transitions, 17623 flow [2024-11-28 05:23:29,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:23:29,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:29,939 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:29,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:30,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:30,140 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 05:23:30,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2047373687, now seen corresponding path program 12 times [2024-11-28 05:23:30,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:30,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103388220] [2024-11-28 05:23:30,141 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:23:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:30,179 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:23:30,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103388220] [2024-11-28 05:23:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103388220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696074991] [2024-11-28 05:23:30,327 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:23:30,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:30,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:30,330 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:30,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679794dd-0a95-4ecf-a7bc-7653642af9cb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:23:30,495 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 05:23:30,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:30,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:23:30,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:30,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:23:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696074991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:30,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:30,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 05:23:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184735574] [2024-11-28 05:23:30,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:30,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:23:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:30,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:23:30,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:30,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-28 05:23:30,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 677 transitions, 17623 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 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 05:23:30,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:30,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-28 05:23:30,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand