./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:50:33,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:50:33,572 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:50:33,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:50:33,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:50:33,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:50:33,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:50:33,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:50:33,617 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:50:33,618 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:50:33,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:50:33,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:50:33,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:50:33,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:50:33,622 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:50:33,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:50:33,623 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:50:33,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:50:33,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:50:33,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:50:33,626 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:50:33,630 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:50:33,631 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:50:33,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:50:33,632 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:50:33,633 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:50:33,633 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:50:33,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:50:33,635 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:50:33,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:50:33,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:50:33,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:50:33,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:50:33,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:50:33,638 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:50:33,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:50:33,639 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:50:33,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:50:33,640 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:50:33,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:50:33,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:50:33,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:50:33,643 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2024-11-08 16:50:34,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:50:34,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:50:34,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:50:34,090 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:50:34,090 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:50:34,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i Unable to find full path for "g++" [2024-11-08 16:50:36,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:50:37,373 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:50:37,375 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-08 16:50:37,401 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/ee5e117d7/6e5262ed6b5147f29bc2f2c27abc5c71/FLAGfe67b6407 [2024-11-08 16:50:37,576 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/ee5e117d7/6e5262ed6b5147f29bc2f2c27abc5c71 [2024-11-08 16:50:37,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:50:37,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:50:37,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:50:37,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:50:37,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:50:37,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:50:37" (1/1) ... [2024-11-08 16:50:37,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c61e162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:37, skipping insertion in model container [2024-11-08 16:50:37,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:50:37" (1/1) ... [2024-11-08 16:50:37,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:50:38,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:50:39,008 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:50:39,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:50:39,315 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:50:39,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39 WrapperNode [2024-11-08 16:50:39,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:50:39,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:50:39,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:50:39,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:50:39,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,455 INFO L138 Inliner]: procedures = 372, calls = 87, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 184 [2024-11-08 16:50:39,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:50:39,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:50:39,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:50:39,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:50:39,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,543 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [64, 14]. 82 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60, 0]. The 11 writes are split as follows [1, 10]. [2024-11-08 16:50:39,544 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:50:39,612 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:50:39,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:50:39,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:50:39,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (1/1) ... [2024-11-08 16:50:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:50:39,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:50:39,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:50:39,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:50:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 16:50:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 16:50:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 16:50:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 16:50:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 16:50:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:50:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:50:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:50:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:50:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 16:50:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:50:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:50:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 16:50:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 16:50:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 16:50:39,742 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 16:50:39,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:50:39,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:50:39,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:50:39,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:50:39,747 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:50:40,042 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:50:40,045 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:50:40,837 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:50:40,838 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:50:41,686 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:50:41,686 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:50:41,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:50:41 BoogieIcfgContainer [2024-11-08 16:50:41,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:50:41,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:50:41,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:50:41,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:50:41,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:50:37" (1/3) ... [2024-11-08 16:50:41,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326cf462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:50:41, skipping insertion in model container [2024-11-08 16:50:41,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:50:39" (2/3) ... [2024-11-08 16:50:41,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326cf462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:50:41, skipping insertion in model container [2024-11-08 16:50:41,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:50:41" (3/3) ... [2024-11-08 16:50:41,701 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2024-11-08 16:50:41,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:50:41,734 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-08 16:50:41,735 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:50:41,825 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-08 16:50:41,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 162 flow [2024-11-08 16:50:41,940 INFO L124 PetriNetUnfolderBase]: 4/78 cut-off events. [2024-11-08 16:50:41,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:50:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 78 events. 4/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-08 16:50:41,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 162 flow [2024-11-08 16:50:41,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 159 flow [2024-11-08 16:50:41,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:50:41,972 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=None, 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;@50cdcf66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:50:41,972 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-08 16:50:41,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:50:41,982 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 16:50:41,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:50:41,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:41,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:50:41,984 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:41,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1497943422, now seen corresponding path program 1 times [2024-11-08 16:50:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559403366] [2024-11-08 16:50:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:42,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559403366] [2024-11-08 16:50:42,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559403366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:42,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:42,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:50:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068031856] [2024-11-08 16:50:42,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:42,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:50:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:50:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:50:42,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-08 16:50:42,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-08 16:50:42,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:42,914 INFO L124 PetriNetUnfolderBase]: 67/276 cut-off events. [2024-11-08 16:50:42,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:50:42,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 276 events. 67/276 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1411 event pairs, 63 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 377. Up to 157 conditions per place. [2024-11-08 16:50:42,926 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 29 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-08 16:50:42,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 223 flow [2024-11-08 16:50:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:50:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:50:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-08 16:50:42,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.759493670886076 [2024-11-08 16:50:42,954 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 159 flow. Second operand 3 states and 180 transitions. [2024-11-08 16:50:42,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 223 flow [2024-11-08 16:50:42,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 79 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:50:42,969 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 172 flow [2024-11-08 16:50:42,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-11-08 16:50:42,980 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-08 16:50:42,983 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 172 flow [2024-11-08 16:50:42,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:42,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:42,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:42,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:50:42,987 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:42,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -490229344, now seen corresponding path program 1 times [2024-11-08 16:50:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:42,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664623259] [2024-11-08 16:50:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664623259] [2024-11-08 16:50:43,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664623259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:50:43,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240217745] [2024-11-08 16:50:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:43,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:50:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:50:43,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:50:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:50:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:43,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:50:43,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:50:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:43,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:50:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240217745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:50:43,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:50:43,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 16:50:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769868976] [2024-11-08 16:50:43,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:50:43,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:50:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:50:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:50:43,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 16:50:43,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 7 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:43,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 16:50:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:43,951 INFO L124 PetriNetUnfolderBase]: 66/280 cut-off events. [2024-11-08 16:50:43,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:50:43,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 280 events. 66/280 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1412 event pairs, 63 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 443. Up to 155 conditions per place. [2024-11-08 16:50:43,959 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 31 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-08 16:50:43,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 258 flow [2024-11-08 16:50:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:50:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:50:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2024-11-08 16:50:43,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6983122362869199 [2024-11-08 16:50:43,970 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 172 flow. Second operand 6 states and 331 transitions. [2024-11-08 16:50:43,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 258 flow [2024-11-08 16:50:43,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:50:43,976 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 206 flow [2024-11-08 16:50:43,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2024-11-08 16:50:43,978 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2024-11-08 16:50:43,979 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 206 flow [2024-11-08 16:50:43,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.857142857142854) internal successors, (349), 7 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:43,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:43,981 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:44,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:50:44,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:50:44,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:44,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1787089402, now seen corresponding path program 2 times [2024-11-08 16:50:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:44,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539606034] [2024-11-08 16:50:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:50:44,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539606034] [2024-11-08 16:50:44,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539606034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:44,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:44,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:50:44,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652655213] [2024-11-08 16:50:44,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:44,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:50:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:50:44,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:50:44,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2024-11-08 16:50:44,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:44,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:44,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2024-11-08 16:50:44,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:44,707 INFO L124 PetriNetUnfolderBase]: 66/276 cut-off events. [2024-11-08 16:50:44,707 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-08 16:50:44,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 276 events. 66/276 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1379 event pairs, 63 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 426. Up to 156 conditions per place. [2024-11-08 16:50:44,710 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 29 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-08 16:50:44,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 264 flow [2024-11-08 16:50:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:50:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:50:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-11-08 16:50:44,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2024-11-08 16:50:44,720 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 206 flow. Second operand 3 states and 169 transitions. [2024-11-08 16:50:44,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 264 flow [2024-11-08 16:50:44,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 16:50:44,728 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 198 flow [2024-11-08 16:50:44,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-11-08 16:50:44,729 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-08 16:50:44,729 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 198 flow [2024-11-08 16:50:44,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:44,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:44,730 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:44,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:50:44,730 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:44,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1787089403, now seen corresponding path program 1 times [2024-11-08 16:50:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:44,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639774173] [2024-11-08 16:50:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:44,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:50:44,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639774173] [2024-11-08 16:50:44,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639774173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:44,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:50:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674238812] [2024-11-08 16:50:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:44,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:50:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:50:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:50:45,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-08 16:50:45,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:45,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-08 16:50:45,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:45,282 INFO L124 PetriNetUnfolderBase]: 66/272 cut-off events. [2024-11-08 16:50:45,282 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-08 16:50:45,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 272 events. 66/272 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1353 event pairs, 63 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 424. Up to 156 conditions per place. [2024-11-08 16:50:45,286 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 27 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-11-08 16:50:45,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 252 flow [2024-11-08 16:50:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:50:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:50:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-08 16:50:45,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.729957805907173 [2024-11-08 16:50:45,289 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 198 flow. Second operand 3 states and 173 transitions. [2024-11-08 16:50:45,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 252 flow [2024-11-08 16:50:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:50:45,294 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 190 flow [2024-11-08 16:50:45,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2024-11-08 16:50:45,295 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-08 16:50:45,296 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 190 flow [2024-11-08 16:50:45,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:45,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:45,297 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:45,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:50:45,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:45,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -593987822, now seen corresponding path program 1 times [2024-11-08 16:50:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:45,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607360717] [2024-11-08 16:50:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:45,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:45,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607360717] [2024-11-08 16:50:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607360717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:50:45,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411906105] [2024-11-08 16:50:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:45,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:50:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:50:45,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:50:45,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:50:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:45,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:50:45,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:50:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:45,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:50:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:50:45,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411906105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:50:45,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:50:45,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 16:50:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47693827] [2024-11-08 16:50:45,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:50:45,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:50:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:50:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:50:45,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 16:50:45,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:45,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:45,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 16:50:45,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:46,236 INFO L124 PetriNetUnfolderBase]: 66/284 cut-off events. [2024-11-08 16:50:46,237 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-08 16:50:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 284 events. 66/284 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1347 event pairs, 63 based on Foata normal form. 6/234 useless extension candidates. Maximal degree in co-relation 478. Up to 155 conditions per place. [2024-11-08 16:50:46,240 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 37 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-11-08 16:50:46,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 372 flow [2024-11-08 16:50:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:50:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:50:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 631 transitions. [2024-11-08 16:50:46,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6656118143459916 [2024-11-08 16:50:46,245 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 190 flow. Second operand 12 states and 631 transitions. [2024-11-08 16:50:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 372 flow [2024-11-08 16:50:46,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 88 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:50:46,250 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 278 flow [2024-11-08 16:50:46,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=278, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2024-11-08 16:50:46,252 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 19 predicate places. [2024-11-08 16:50:46,252 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 278 flow [2024-11-08 16:50:46,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 50.0) internal successors, (650), 13 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:46,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:46,254 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:46,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:50:46,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:50:46,455 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:46,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1028843450, now seen corresponding path program 2 times [2024-11-08 16:50:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:46,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763662222] [2024-11-08 16:50:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:46,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763662222] [2024-11-08 16:50:46,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763662222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:46,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:46,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:50:46,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930908025] [2024-11-08 16:50:46,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:46,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:50:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:50:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:50:47,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2024-11-08 16:50:47,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:47,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:47,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2024-11-08 16:50:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:47,316 INFO L124 PetriNetUnfolderBase]: 75/302 cut-off events. [2024-11-08 16:50:47,317 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-08 16:50:47,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 302 events. 75/302 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1435 event pairs, 72 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 465. Up to 184 conditions per place. [2024-11-08 16:50:47,320 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 39 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2024-11-08 16:50:47,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 76 transitions, 350 flow [2024-11-08 16:50:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:50:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:50:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-08 16:50:47,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7046413502109705 [2024-11-08 16:50:47,322 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 278 flow. Second operand 3 states and 167 transitions. [2024-11-08 16:50:47,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 76 transitions, 350 flow [2024-11-08 16:50:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 76 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:50:47,329 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 266 flow [2024-11-08 16:50:47,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-11-08 16:50:47,330 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2024-11-08 16:50:47,331 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 266 flow [2024-11-08 16:50:47,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:47,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:47,331 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:47,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:50:47,332 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:47,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1028843449, now seen corresponding path program 1 times [2024-11-08 16:50:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:47,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946539612] [2024-11-08 16:50:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:47,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946539612] [2024-11-08 16:50:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946539612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:47,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:47,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:50:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395782707] [2024-11-08 16:50:47,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:47,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:50:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:50:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:50:48,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 79 [2024-11-08 16:50:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:48,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:48,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 79 [2024-11-08 16:50:48,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:48,496 INFO L124 PetriNetUnfolderBase]: 66/292 cut-off events. [2024-11-08 16:50:48,497 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-08 16:50:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 292 events. 66/292 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1263 event pairs, 63 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 536. Up to 167 conditions per place. [2024-11-08 16:50:48,500 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 41 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2024-11-08 16:50:48,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 83 transitions, 376 flow [2024-11-08 16:50:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:50:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:50:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2024-11-08 16:50:48,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6025316455696202 [2024-11-08 16:50:48,502 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 266 flow. Second operand 5 states and 238 transitions. [2024-11-08 16:50:48,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 83 transitions, 376 flow [2024-11-08 16:50:48,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 83 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:50:48,508 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 317 flow [2024-11-08 16:50:48,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2024-11-08 16:50:48,509 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 19 predicate places. [2024-11-08 16:50:48,510 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 317 flow [2024-11-08 16:50:48,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:48,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:48,510 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:48,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:50:48,511 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:48,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -78795554, now seen corresponding path program 1 times [2024-11-08 16:50:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:48,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859285417] [2024-11-08 16:50:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:49,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859285417] [2024-11-08 16:50:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859285417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:49,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:49,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:50:49,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717763389] [2024-11-08 16:50:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:49,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:50:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:50:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:50:50,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2024-11-08 16:50:50,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:50,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:50,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2024-11-08 16:50:50,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:50,449 INFO L124 PetriNetUnfolderBase]: 66/288 cut-off events. [2024-11-08 16:50:50,449 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-08 16:50:50,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 288 events. 66/288 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1243 event pairs, 63 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 548. Up to 159 conditions per place. [2024-11-08 16:50:50,453 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 31 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-11-08 16:50:50,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 79 transitions, 397 flow [2024-11-08 16:50:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:50:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:50:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-08 16:50:50,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6238698010849909 [2024-11-08 16:50:50,456 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 317 flow. Second operand 7 states and 345 transitions. [2024-11-08 16:50:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 79 transitions, 397 flow [2024-11-08 16:50:50,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 79 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:50:50,461 INFO L231 Difference]: Finished difference. Result has 99 places, 79 transitions, 331 flow [2024-11-08 16:50:50,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=99, PETRI_TRANSITIONS=79} [2024-11-08 16:50:50,463 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 21 predicate places. [2024-11-08 16:50:50,463 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 79 transitions, 331 flow [2024-11-08 16:50:50,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:50,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:50,464 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:50,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:50:50,464 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:50,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash -78795555, now seen corresponding path program 1 times [2024-11-08 16:50:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:50,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201858798] [2024-11-08 16:50:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201858798] [2024-11-08 16:50:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201858798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:50:51,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477723692] [2024-11-08 16:50:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:51,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:50:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:50:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:50:51,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-08 16:50:51,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 79 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 43.57142857142857) internal successors, (305), 7 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:51,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:51,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-08 16:50:51,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:51,934 INFO L124 PetriNetUnfolderBase]: 66/284 cut-off events. [2024-11-08 16:50:51,935 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-08 16:50:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 284 events. 66/284 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1216 event pairs, 63 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 561. Up to 159 conditions per place. [2024-11-08 16:50:51,938 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-11-08 16:50:51,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 77 transitions, 417 flow [2024-11-08 16:50:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:50:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:50:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 327 transitions. [2024-11-08 16:50:51,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5913200723327305 [2024-11-08 16:50:51,941 INFO L175 Difference]: Start difference. First operand has 99 places, 79 transitions, 331 flow. Second operand 7 states and 327 transitions. [2024-11-08 16:50:51,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 77 transitions, 417 flow [2024-11-08 16:50:51,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 77 transitions, 395 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:50:51,946 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 327 flow [2024-11-08 16:50:51,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2024-11-08 16:50:51,948 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 19 predicate places. [2024-11-08 16:50:51,948 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 327 flow [2024-11-08 16:50:51,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.57142857142857) internal successors, (305), 7 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:51,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:51,949 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:51,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:50:51,949 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:51,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1586902105, now seen corresponding path program 1 times [2024-11-08 16:50:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:51,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50500829] [2024-11-08 16:50:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:52,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:52,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50500829] [2024-11-08 16:50:52,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50500829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:52,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:50:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933296134] [2024-11-08 16:50:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:52,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:50:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:50:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:50:52,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2024-11-08 16:50:52,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:52,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:52,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2024-11-08 16:50:52,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:52,901 INFO L124 PetriNetUnfolderBase]: 66/282 cut-off events. [2024-11-08 16:50:52,901 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-08 16:50:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 282 events. 66/282 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1206 event pairs, 63 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 553. Up to 161 conditions per place. [2024-11-08 16:50:52,904 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 31 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-11-08 16:50:52,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 76 transitions, 409 flow [2024-11-08 16:50:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:50:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:50:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-11-08 16:50:52,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556962025316456 [2024-11-08 16:50:52,906 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 327 flow. Second operand 5 states and 259 transitions. [2024-11-08 16:50:52,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 76 transitions, 409 flow [2024-11-08 16:50:52,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 76 transitions, 387 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:50:52,911 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 325 flow [2024-11-08 16:50:52,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-11-08 16:50:52,913 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-08 16:50:52,913 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 325 flow [2024-11-08 16:50:52,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:52,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:52,914 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:52,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:50:52,914 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:52,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:52,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1586902104, now seen corresponding path program 1 times [2024-11-08 16:50:52,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:52,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972157942] [2024-11-08 16:50:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972157942] [2024-11-08 16:50:53,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972157942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:50:53,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:50:53,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:50:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686877761] [2024-11-08 16:50:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:50:53,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:50:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:50:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:50:53,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2024-11-08 16:50:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:50:53,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2024-11-08 16:50:53,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:50:53,585 INFO L124 PetriNetUnfolderBase]: 66/280 cut-off events. [2024-11-08 16:50:53,585 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-11-08 16:50:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 280 events. 66/280 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1197 event pairs, 63 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 555. Up to 161 conditions per place. [2024-11-08 16:50:53,588 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 33 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-11-08 16:50:53,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 75 transitions, 411 flow [2024-11-08 16:50:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:50:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:50:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-08 16:50:53,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354430379746835 [2024-11-08 16:50:53,590 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 325 flow. Second operand 5 states and 251 transitions. [2024-11-08 16:50:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 75 transitions, 411 flow [2024-11-08 16:50:53,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 75 transitions, 389 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:50:53,595 INFO L231 Difference]: Finished difference. Result has 93 places, 75 transitions, 323 flow [2024-11-08 16:50:53,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=93, PETRI_TRANSITIONS=75} [2024-11-08 16:50:53,597 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-08 16:50:53,597 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 75 transitions, 323 flow [2024-11-08 16:50:53,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:50:53,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:50:53,598 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:50:53,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:50:53,598 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:50:53,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:50:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1041482354, now seen corresponding path program 1 times [2024-11-08 16:50:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:50:53,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344975634] [2024-11-08 16:50:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:50:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:54,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:50:54,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344975634] [2024-11-08 16:50:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344975634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:50:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30422564] [2024-11-08 16:50:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:50:54,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:50:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:50:54,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:50:54,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:50:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:50:54,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 16:50:54,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:50:55,207 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:50:55,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:50:55,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:50:55,374 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:50:55,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:50:55,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 16:50:55,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:50:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:50:55,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:50:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:55,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:50:56,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:50:56,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 16:50:56,293 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 16:50:56,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-08 16:50:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:50:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30422564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:50:57,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:50:57,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 19 [2024-11-08 16:50:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948464268] [2024-11-08 16:50:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:50:57,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:50:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:50:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:50:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:51:01,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 79 [2024-11-08 16:51:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 75 transitions, 323 flow. Second operand has 21 states, 21 states have (on average 39.857142857142854) internal successors, (837), 21 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:01,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:01,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 79 [2024-11-08 16:51:01,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:02,685 INFO L124 PetriNetUnfolderBase]: 77/321 cut-off events. [2024-11-08 16:51:02,685 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-08 16:51:02,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 321 events. 77/321 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1370 event pairs, 72 based on Foata normal form. 6/282 useless extension candidates. Maximal degree in co-relation 637. Up to 175 conditions per place. [2024-11-08 16:51:02,689 INFO L140 encePairwiseOnDemand]: 67/79 looper letters, 46 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-11-08 16:51:02,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 86 transitions, 489 flow [2024-11-08 16:51:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:51:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:51:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 473 transitions. [2024-11-08 16:51:02,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5443037974683544 [2024-11-08 16:51:02,692 INFO L175 Difference]: Start difference. First operand has 93 places, 75 transitions, 323 flow. Second operand 11 states and 473 transitions. [2024-11-08 16:51:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 86 transitions, 489 flow [2024-11-08 16:51:02,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 86 transitions, 451 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:51:02,699 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 338 flow [2024-11-08 16:51:02,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=338, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2024-11-08 16:51:02,701 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 21 predicate places. [2024-11-08 16:51:02,702 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 338 flow [2024-11-08 16:51:02,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 39.857142857142854) internal successors, (837), 21 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:02,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:02,703 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:02,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:51:02,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:51:02,907 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:02,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2144883993, now seen corresponding path program 1 times [2024-11-08 16:51:02,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:02,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197006236] [2024-11-08 16:51:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:02,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:51:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197006236] [2024-11-08 16:51:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197006236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:51:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674582584] [2024-11-08 16:51:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:51:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:51:03,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:51:03,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:51:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:03,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 16:51:03,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:51:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:03,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:51:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:03,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674582584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:51:03,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:51:03,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-08 16:51:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592303270] [2024-11-08 16:51:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:51:03,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 16:51:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:51:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 16:51:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:51:03,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 16:51:03,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 338 flow. Second operand has 9 states, 9 states have (on average 53.77777777777778) internal successors, (484), 9 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:03,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:03,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 16:51:03,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:04,050 INFO L124 PetriNetUnfolderBase]: 65/322 cut-off events. [2024-11-08 16:51:04,051 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-08 16:51:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 322 events. 65/322 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1123 event pairs, 63 based on Foata normal form. 8/288 useless extension candidates. Maximal degree in co-relation 657. Up to 158 conditions per place. [2024-11-08 16:51:04,054 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 72 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2024-11-08 16:51:04,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 108 transitions, 609 flow [2024-11-08 16:51:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:51:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:51:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2024-11-08 16:51:04,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7325949367088608 [2024-11-08 16:51:04,057 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 338 flow. Second operand 8 states and 463 transitions. [2024-11-08 16:51:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 108 transitions, 609 flow [2024-11-08 16:51:04,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 595 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:51:04,062 INFO L231 Difference]: Finished difference. Result has 107 places, 78 transitions, 375 flow [2024-11-08 16:51:04,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=107, PETRI_TRANSITIONS=78} [2024-11-08 16:51:04,063 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2024-11-08 16:51:04,063 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 78 transitions, 375 flow [2024-11-08 16:51:04,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.77777777777778) internal successors, (484), 9 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:04,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:04,095 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:04,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:51:04,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 16:51:04,296 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:04,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1221466201, now seen corresponding path program 2 times [2024-11-08 16:51:04,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:04,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370986786] [2024-11-08 16:51:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:04,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:51:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370986786] [2024-11-08 16:51:05,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370986786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:51:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976488383] [2024-11-08 16:51:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:51:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:51:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:51:05,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:51:05,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:51:05,462 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:51:05,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:51:05,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 16:51:05,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:51:05,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:51:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2024-11-08 16:51:05,512 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:51:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976488383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:51:05,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:51:05,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2024-11-08 16:51:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355419605] [2024-11-08 16:51:05,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:51:05,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:51:05,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:51:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:51:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:51:05,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-08 16:51:05,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 78 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:05,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:05,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-08 16:51:05,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:05,877 INFO L124 PetriNetUnfolderBase]: 65/325 cut-off events. [2024-11-08 16:51:05,877 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-11-08 16:51:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 325 events. 65/325 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1128 event pairs, 56 based on Foata normal form. 8/296 useless extension candidates. Maximal degree in co-relation 670. Up to 184 conditions per place. [2024-11-08 16:51:05,881 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 52 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-08 16:51:05,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 83 transitions, 493 flow [2024-11-08 16:51:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:51:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:51:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2024-11-08 16:51:05,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7763713080168776 [2024-11-08 16:51:05,883 INFO L175 Difference]: Start difference. First operand has 107 places, 78 transitions, 375 flow. Second operand 3 states and 184 transitions. [2024-11-08 16:51:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 83 transitions, 493 flow [2024-11-08 16:51:05,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 83 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:51:05,889 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 371 flow [2024-11-08 16:51:05,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=371, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2024-11-08 16:51:05,890 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 27 predicate places. [2024-11-08 16:51:05,890 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 371 flow [2024-11-08 16:51:05,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:05,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:05,891 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:05,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:51:06,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:51:06,092 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:06,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1221466200, now seen corresponding path program 1 times [2024-11-08 16:51:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960288845] [2024-11-08 16:51:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2024-11-08 16:51:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:51:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960288845] [2024-11-08 16:51:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960288845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:51:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:51:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:51:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338291769] [2024-11-08 16:51:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:51:06,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:51:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:51:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:51:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:51:06,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 16:51:06,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:06,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:06,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 16:51:06,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:06,812 INFO L124 PetriNetUnfolderBase]: 72/316 cut-off events. [2024-11-08 16:51:06,812 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-08 16:51:06,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 316 events. 72/316 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1016 event pairs, 56 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 690. Up to 184 conditions per place. [2024-11-08 16:51:06,816 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 53 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-08 16:51:06,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 491 flow [2024-11-08 16:51:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:51:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:51:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-08 16:51:06,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7679324894514767 [2024-11-08 16:51:06,818 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 371 flow. Second operand 3 states and 182 transitions. [2024-11-08 16:51:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 491 flow [2024-11-08 16:51:06,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 81 transitions, 487 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:51:06,824 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 367 flow [2024-11-08 16:51:06,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-11-08 16:51:06,825 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2024-11-08 16:51:06,825 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 367 flow [2024-11-08 16:51:06,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:06,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:06,826 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:06,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 16:51:06,826 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:06,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1220286393, now seen corresponding path program 1 times [2024-11-08 16:51:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:06,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394646720] [2024-11-08 16:51:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:07,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:51:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394646720] [2024-11-08 16:51:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394646720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:51:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657976782] [2024-11-08 16:51:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:07,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:51:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:51:07,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:51:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:51:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:08,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:51:08,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:51:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:08,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:51:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657976782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:51:08,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:51:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-08 16:51:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359733882] [2024-11-08 16:51:08,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:51:08,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:51:08,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:51:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:51:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:51:08,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 16:51:08,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 367 flow. Second operand has 13 states, 13 states have (on average 55.0) internal successors, (715), 13 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:08,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:08,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 16:51:08,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:09,125 INFO L124 PetriNetUnfolderBase]: 65/350 cut-off events. [2024-11-08 16:51:09,125 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-11-08 16:51:09,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 350 events. 65/350 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 963 event pairs, 63 based on Foata normal form. 4/324 useless extension candidates. Maximal degree in co-relation 797. Up to 158 conditions per place. [2024-11-08 16:51:09,128 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 100 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2024-11-08 16:51:09,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 136 transitions, 859 flow [2024-11-08 16:51:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:51:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:51:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 683 transitions. [2024-11-08 16:51:09,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7204641350210971 [2024-11-08 16:51:09,132 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 367 flow. Second operand 12 states and 683 transitions. [2024-11-08 16:51:09,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 136 transitions, 859 flow [2024-11-08 16:51:09,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 136 transitions, 855 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:51:09,139 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 459 flow [2024-11-08 16:51:09,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2024-11-08 16:51:09,140 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 39 predicate places. [2024-11-08 16:51:09,140 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 459 flow [2024-11-08 16:51:09,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 55.0) internal successors, (715), 13 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:09,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:09,141 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:09,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:51:09,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:51:09,346 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:09,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1384774393, now seen corresponding path program 2 times [2024-11-08 16:51:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671324756] [2024-11-08 16:51:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:51:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 372 proven. 133 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:51:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671324756] [2024-11-08 16:51:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671324756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:51:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741173911] [2024-11-08 16:51:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:51:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:51:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:51:11,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:51:11,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:51:12,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:51:12,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:51:12,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 16:51:12,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:51:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 468 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:13,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:51:13,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-08 16:51:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 468 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:51:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741173911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:51:14,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:51:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-08 16:51:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237127184] [2024-11-08 16:51:14,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:51:14,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 16:51:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:51:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 16:51:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2024-11-08 16:51:15,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-08 16:51:15,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 79 transitions, 459 flow. Second operand has 26 states, 26 states have (on average 53.30769230769231) internal successors, (1386), 26 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:15,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:51:15,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-08 16:51:15,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:51:16,377 INFO L124 PetriNetUnfolderBase]: 110/510 cut-off events. [2024-11-08 16:51:16,378 INFO L125 PetriNetUnfolderBase]: For 362/362 co-relation queries the response was YES. [2024-11-08 16:51:16,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 510 events. 110/510 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2146 event pairs, 26 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 1057. Up to 148 conditions per place. [2024-11-08 16:51:16,382 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 108 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2024-11-08 16:51:16,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 151 transitions, 942 flow [2024-11-08 16:51:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:51:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-08 16:51:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 870 transitions. [2024-11-08 16:51:16,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6882911392405063 [2024-11-08 16:51:16,389 INFO L175 Difference]: Start difference. First operand has 117 places, 79 transitions, 459 flow. Second operand 16 states and 870 transitions. [2024-11-08 16:51:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 151 transitions, 942 flow [2024-11-08 16:51:16,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 151 transitions, 932 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:51:16,397 INFO L231 Difference]: Finished difference. Result has 131 places, 85 transitions, 531 flow [2024-11-08 16:51:16,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=531, PETRI_PLACES=131, PETRI_TRANSITIONS=85} [2024-11-08 16:51:16,398 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 53 predicate places. [2024-11-08 16:51:16,398 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 85 transitions, 531 flow [2024-11-08 16:51:16,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.30769230769231) internal successors, (1386), 26 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:51:16,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:51:16,400 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:51:16,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 16:51:16,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 16:51:16,605 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:51:16,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:51:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -21666348, now seen corresponding path program 1 times [2024-11-08 16:51:16,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:51:16,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664013460] [2024-11-08 16:51:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:51:16,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:51:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 505 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:52:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:52:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664013460] [2024-11-08 16:52:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664013460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:52:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473026896] [2024-11-08 16:52:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:52:38,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:52:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:52:38,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:52:38,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:52:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:52:41,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 2236 conjuncts, 304 conjuncts are in the unsatisfiable core [2024-11-08 16:52:41,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:52:42,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2024-11-08 16:52:43,021 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-08 16:52:43,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-08 16:52:43,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 16:52:43,762 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-11-08 16:52:43,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-11-08 16:52:44,269 INFO L349 Elim1Store]: treesize reduction 70, result has 35.8 percent of original size [2024-11-08 16:52:44,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 48 [2024-11-08 16:52:44,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2024-11-08 16:52:45,555 INFO L349 Elim1Store]: treesize reduction 90, result has 34.8 percent of original size [2024-11-08 16:52:45,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 60 [2024-11-08 16:52:46,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 59 [2024-11-08 16:52:46,297 INFO L349 Elim1Store]: treesize reduction 90, result has 34.8 percent of original size [2024-11-08 16:52:46,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 60 [2024-11-08 16:52:48,356 INFO L349 Elim1Store]: treesize reduction 162, result has 32.5 percent of original size [2024-11-08 16:52:48,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 96 [2024-11-08 16:52:49,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 103 [2024-11-08 16:52:49,540 INFO L349 Elim1Store]: treesize reduction 162, result has 32.5 percent of original size [2024-11-08 16:52:49,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 96 [2024-11-08 16:52:52,935 INFO L349 Elim1Store]: treesize reduction 234, result has 31.6 percent of original size [2024-11-08 16:52:52,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 71 treesize of output 132 [2024-11-08 16:52:54,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 159 [2024-11-08 16:52:55,041 INFO L349 Elim1Store]: treesize reduction 156, result has 40.9 percent of original size [2024-11-08 16:52:55,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 26 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 129 [2024-11-08 16:54:10,857 WARN L286 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 2526 DAG size of output: 2423 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-08 16:54:10,860 INFO L349 Elim1Store]: treesize reduction 464, result has 92.3 percent of original size [2024-11-08 16:54:10,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 34 select indices, 34 select index equivalence classes, 10 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 585 case distinctions, treesize of input 1606 treesize of output 7006 [2024-11-08 17:00:19,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-08 17:00:19,877 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-08 17:00:19,878 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-08 17:00:19,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:20,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:00:20,079 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:290) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 60 more [2024-11-08 17:00:20,083 INFO L158 Benchmark]: Toolchain (without parser) took 582501.23ms. Allocated memory was 157.3MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 115.3MB in the beginning and 778.1MB in the end (delta: -662.8MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-11-08 17:00:20,084 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 157.3MB. Free memory is still 102.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 17:00:20,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1734.13ms. Allocated memory is still 157.3MB. Free memory was 114.8MB in the beginning and 70.2MB in the end (delta: 44.6MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2024-11-08 17:00:20,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 140.02ms. Allocated memory is still 157.3MB. Free memory was 70.2MB in the beginning and 66.6MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 17:00:20,087 INFO L158 Benchmark]: Boogie Preprocessor took 151.32ms. Allocated memory is still 157.3MB. Free memory was 66.6MB in the beginning and 62.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-08 17:00:20,087 INFO L158 Benchmark]: RCFGBuilder took 2075.22ms. Allocated memory was 157.3MB in the beginning and 211.8MB in the end (delta: 54.5MB). Free memory was 62.9MB in the beginning and 136.5MB in the end (delta: -73.6MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. [2024-11-08 17:00:20,088 INFO L158 Benchmark]: TraceAbstraction took 578392.47ms. Allocated memory was 211.8MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 135.4MB in the beginning and 778.1MB in the end (delta: -642.7MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-11-08 17:00:20,093 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 157.3MB. Free memory is still 102.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1734.13ms. Allocated memory is still 157.3MB. Free memory was 114.8MB in the beginning and 70.2MB in the end (delta: 44.6MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 140.02ms. Allocated memory is still 157.3MB. Free memory was 70.2MB in the beginning and 66.6MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 151.32ms. Allocated memory is still 157.3MB. Free memory was 66.6MB in the beginning and 62.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2075.22ms. Allocated memory was 157.3MB in the beginning and 211.8MB in the end (delta: 54.5MB). Free memory was 62.9MB in the beginning and 136.5MB in the end (delta: -73.6MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. * TraceAbstraction took 578392.47ms. Allocated memory was 211.8MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 135.4MB in the beginning and 778.1MB in the end (delta: -642.7MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:00:22,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:00:22,877 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-08 17:00:22,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:00:22,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:00:22,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:00:22,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:00:22,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:00:22,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:00:22,912 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:00:22,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:00:22,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:00:22,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:00:22,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:00:22,915 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:00:22,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:00:22,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:00:22,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:00:22,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:00:22,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:00:22,918 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:00:22,918 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:00:22,919 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:00:22,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:00:22,919 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:00:22,920 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 17:00:22,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:00:22,921 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 17:00:22,921 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:00:22,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:00:22,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:00:22,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:00:22,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:00:22,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:00:22,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:00:22,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:00:22,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:00:22,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:00:22,925 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-08 17:00:22,926 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 17:00:22,926 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:00:22,942 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:00:22,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:00:22,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:00:22,943 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2024-11-08 17:00:23,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:00:23,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:00:23,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:00:23,412 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:00:23,412 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:00:23,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i Unable to find full path for "g++" [2024-11-08 17:00:25,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:00:26,295 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:00:26,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-08 17:00:26,325 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/9f68b8e19/5505b6f387764fb0a706e6ae6292235f/FLAGfb6b256bf [2024-11-08 17:00:26,415 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/data/9f68b8e19/5505b6f387764fb0a706e6ae6292235f [2024-11-08 17:00:26,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:00:26,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:00:26,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:00:26,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:00:26,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:00:26,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:00:26" (1/1) ... [2024-11-08 17:00:26,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8b69a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:26, skipping insertion in model container [2024-11-08 17:00:26,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:00:26" (1/1) ... [2024-11-08 17:00:26,525 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:00:27,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:00:27,553 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:00:27,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:00:27,779 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:00:27,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27 WrapperNode [2024-11-08 17:00:27,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:00:27,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:00:27,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:00:27,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:00:27,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,868 INFO L138 Inliner]: procedures = 373, calls = 87, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 183 [2024-11-08 17:00:27,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:00:27,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:00:27,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:00:27,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:00:27,892 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,901 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,928 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [64, 14]. 82 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60, 0]. The 11 writes are split as follows [1, 10]. [2024-11-08 17:00:27,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:00:27,964 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:00:27,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:00:27,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:00:27,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (1/1) ... [2024-11-08 17:00:27,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:00:28,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:28,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:00:28,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:00:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-08 17:00:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:00:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:00:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 17:00:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 17:00:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 17:00:28,072 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 17:00:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:00:28,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:00:28,074 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:00:28,378 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:00:28,380 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:00:29,356 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:00:29,357 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:00:30,413 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:00:30,414 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:00:30,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:00:30 BoogieIcfgContainer [2024-11-08 17:00:30,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:00:30,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:00:30,420 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:00:30,423 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:00:30,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:00:26" (1/3) ... [2024-11-08 17:00:30,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c1a497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:00:30, skipping insertion in model container [2024-11-08 17:00:30,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:00:27" (2/3) ... [2024-11-08 17:00:30,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c1a497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:00:30, skipping insertion in model container [2024-11-08 17:00:30,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:00:30" (3/3) ... [2024-11-08 17:00:30,430 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2024-11-08 17:00:30,453 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:00:30,453 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-08 17:00:30,453 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:00:30,560 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-08 17:00:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 162 flow [2024-11-08 17:00:30,667 INFO L124 PetriNetUnfolderBase]: 4/78 cut-off events. [2024-11-08 17:00:30,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:00:30,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 78 events. 4/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-08 17:00:30,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 162 flow [2024-11-08 17:00:30,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 159 flow [2024-11-08 17:00:30,691 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:00:30,701 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=None, 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;@7d74514b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:00:30,704 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-08 17:00:30,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:00:30,714 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 17:00:30,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:00:30,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:30,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:00:30,716 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:30,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1557110334, now seen corresponding path program 1 times [2024-11-08 17:00:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:30,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793689997] [2024-11-08 17:00:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:30,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:30,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:30,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:00:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:30,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:00:30,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:31,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 17:00:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:31,076 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:31,077 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793689997] [2024-11-08 17:00:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793689997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:31,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:31,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:00:31,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106460179] [2024-11-08 17:00:31,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:31,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:00:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:00:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:00:31,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2024-11-08 17:00:31,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:31,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:31,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2024-11-08 17:00:31,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:31,644 INFO L124 PetriNetUnfolderBase]: 67/270 cut-off events. [2024-11-08 17:00:31,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:00:31,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 270 events. 67/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1383 event pairs, 63 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 377. Up to 153 conditions per place. [2024-11-08 17:00:31,653 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 26 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-11-08 17:00:31,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 211 flow [2024-11-08 17:00:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:00:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:00:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-11-08 17:00:31,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7130801687763713 [2024-11-08 17:00:31,674 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 159 flow. Second operand 3 states and 169 transitions. [2024-11-08 17:00:31,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 211 flow [2024-11-08 17:00:31,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:00:31,686 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 158 flow [2024-11-08 17:00:31,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-11-08 17:00:31,695 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-11-08 17:00:31,696 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 158 flow [2024-11-08 17:00:31,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:31,697 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:31,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:00:31,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:00:31,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:31,899 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:31,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1557110333, now seen corresponding path program 1 times [2024-11-08 17:00:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232731645] [2024-11-08 17:00:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:31,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:31,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:31,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:00:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:32,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 17:00:32,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:32,106 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:32,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:32,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232731645] [2024-11-08 17:00:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232731645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:32,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:32,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:00:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253345538] [2024-11-08 17:00:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:32,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:00:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:00:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:00:32,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-08 17:00:32,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:32,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:32,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-08 17:00:32,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:32,428 INFO L124 PetriNetUnfolderBase]: 67/272 cut-off events. [2024-11-08 17:00:32,429 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:00:32,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 272 events. 67/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1383 event pairs, 63 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 400. Up to 157 conditions per place. [2024-11-08 17:00:32,432 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 29 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-08 17:00:32,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 222 flow [2024-11-08 17:00:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:00:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:00:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-08 17:00:32,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.759493670886076 [2024-11-08 17:00:32,436 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 158 flow. Second operand 3 states and 180 transitions. [2024-11-08 17:00:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 222 flow [2024-11-08 17:00:32,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:00:32,439 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 164 flow [2024-11-08 17:00:32,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-08 17:00:32,441 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-11-08 17:00:32,441 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 164 flow [2024-11-08 17:00:32,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:32,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:32,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:32,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:00:32,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:32,646 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:32,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1515056991, now seen corresponding path program 1 times [2024-11-08 17:00:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:32,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906058897] [2024-11-08 17:00:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:32,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:32,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:32,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:00:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:32,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:00:32,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:32,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:00:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:00:32,826 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:32,826 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906058897] [2024-11-08 17:00:32,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906058897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:32,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:32,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:00:32,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025634847] [2024-11-08 17:00:32,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:32,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:00:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:00:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:00:33,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-08 17:00:33,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:33,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:33,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-08 17:00:33,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:33,320 INFO L124 PetriNetUnfolderBase]: 67/268 cut-off events. [2024-11-08 17:00:33,320 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:00:33,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 268 events. 67/268 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1355 event pairs, 63 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 423. Up to 154 conditions per place. [2024-11-08 17:00:33,323 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 25 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-08 17:00:33,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 214 flow [2024-11-08 17:00:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:00:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:00:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-08 17:00:33,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.729957805907173 [2024-11-08 17:00:33,327 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 164 flow. Second operand 3 states and 173 transitions. [2024-11-08 17:00:33,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 214 flow [2024-11-08 17:00:33,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:00:33,330 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 162 flow [2024-11-08 17:00:33,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-08 17:00:33,331 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-08 17:00:33,331 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 162 flow [2024-11-08 17:00:33,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:33,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:33,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:33,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:00:33,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:33,533 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:33,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash 24159224, now seen corresponding path program 1 times [2024-11-08 17:00:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134531893] [2024-11-08 17:00:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:33,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:33,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:00:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:33,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:00:33,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:33,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:33,743 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134531893] [2024-11-08 17:00:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134531893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:33,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:00:33,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-11-08 17:00:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621572937] [2024-11-08 17:00:33,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:33,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:00:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:00:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:00:33,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 17:00:33,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:33,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:33,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 17:00:33,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:34,169 INFO L124 PetriNetUnfolderBase]: 66/272 cut-off events. [2024-11-08 17:00:34,169 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:00:34,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 272 events. 66/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1353 event pairs, 63 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 419. Up to 155 conditions per place. [2024-11-08 17:00:34,173 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 31 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2024-11-08 17:00:34,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 248 flow [2024-11-08 17:00:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:00:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:00:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2024-11-08 17:00:34,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6983122362869199 [2024-11-08 17:00:34,177 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 162 flow. Second operand 6 states and 331 transitions. [2024-11-08 17:00:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 248 flow [2024-11-08 17:00:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:00:34,181 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 190 flow [2024-11-08 17:00:34,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-11-08 17:00:34,183 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-08 17:00:34,183 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 190 flow [2024-11-08 17:00:34,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:34,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:34,184 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:34,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:34,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:34,385 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:34,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1033778450, now seen corresponding path program 2 times [2024-11-08 17:00:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030339106] [2024-11-08 17:00:34,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:00:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:34,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:34,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:00:34,560 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:00:34,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:00:34,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 17:00:34,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:34,770 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-08 17:00:34,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-08 17:00:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 17:00:34,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:34,808 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030339106] [2024-11-08 17:00:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030339106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:34,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:00:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622438647] [2024-11-08 17:00:34,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:34,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:00:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:00:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:00:35,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-08 17:00:35,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:35,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:35,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-08 17:00:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:35,213 INFO L124 PetriNetUnfolderBase]: 66/263 cut-off events. [2024-11-08 17:00:35,214 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-08 17:00:35,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 263 events. 66/263 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1268 event pairs, 63 based on Foata normal form. 9/225 useless extension candidates. Maximal degree in co-relation 411. Up to 157 conditions per place. [2024-11-08 17:00:35,216 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 30 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2024-11-08 17:00:35,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 244 flow [2024-11-08 17:00:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:00:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:00:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-11-08 17:00:35,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.729957805907173 [2024-11-08 17:00:35,218 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 190 flow. Second operand 3 states and 173 transitions. [2024-11-08 17:00:35,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 244 flow [2024-11-08 17:00:35,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 69 transitions, 236 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 17:00:35,222 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 176 flow [2024-11-08 17:00:35,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-11-08 17:00:35,223 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-08 17:00:35,223 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 176 flow [2024-11-08 17:00:35,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:35,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:35,224 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:35,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:00:35,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:35,429 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:35,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:35,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1033778451, now seen corresponding path program 1 times [2024-11-08 17:00:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498577792] [2024-11-08 17:00:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:35,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:35,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:35,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:00:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:35,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:00:35,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:35,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:00:35,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498577792] [2024-11-08 17:00:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498577792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:35,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:00:35,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-08 17:00:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074944156] [2024-11-08 17:00:35,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:35,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:00:35,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:00:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:00:35,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 17:00:35,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 176 flow. Second operand has 12 states, 12 states have (on average 49.916666666666664) internal successors, (599), 12 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:35,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:35,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 17:00:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:36,630 INFO L124 PetriNetUnfolderBase]: 66/275 cut-off events. [2024-11-08 17:00:36,630 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-08 17:00:36,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 275 events. 66/275 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1261 event pairs, 63 based on Foata normal form. 6/234 useless extension candidates. Maximal degree in co-relation 492. Up to 155 conditions per place. [2024-11-08 17:00:36,633 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 37 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-11-08 17:00:36,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 358 flow [2024-11-08 17:00:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:00:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:00:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 631 transitions. [2024-11-08 17:00:36,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6656118143459916 [2024-11-08 17:00:36,637 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 176 flow. Second operand 12 states and 631 transitions. [2024-11-08 17:00:36,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 358 flow [2024-11-08 17:00:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:00:36,641 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 271 flow [2024-11-08 17:00:36,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=271, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-11-08 17:00:36,642 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-08 17:00:36,642 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 271 flow [2024-11-08 17:00:36,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.916666666666664) internal successors, (599), 12 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:36,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:36,644 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:36,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:00:36,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:36,848 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:36,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2074592455, now seen corresponding path program 2 times [2024-11-08 17:00:36,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768740515] [2024-11-08 17:00:36,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:00:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:36,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:36,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:00:36,995 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:00:36,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:00:37,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:00:37,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:00:37,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:00:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:37,562 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:37,562 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:37,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768740515] [2024-11-08 17:00:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768740515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:37,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:00:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766779388] [2024-11-08 17:00:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:37,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:00:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:00:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:00:38,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-08 17:00:38,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:38,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:38,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-08 17:00:38,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:38,426 INFO L124 PetriNetUnfolderBase]: 75/319 cut-off events. [2024-11-08 17:00:38,426 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-08 17:00:38,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 319 events. 75/319 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1417 event pairs, 72 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 584. Up to 186 conditions per place. [2024-11-08 17:00:38,429 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 46 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2024-11-08 17:00:38,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 383 flow [2024-11-08 17:00:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:00:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:00:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2024-11-08 17:00:38,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708860759493671 [2024-11-08 17:00:38,435 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 271 flow. Second operand 4 states and 212 transitions. [2024-11-08 17:00:38,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 383 flow [2024-11-08 17:00:38,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 83 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:00:38,450 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 285 flow [2024-11-08 17:00:38,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2024-11-08 17:00:38,451 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2024-11-08 17:00:38,451 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 285 flow [2024-11-08 17:00:38,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:38,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:38,452 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:38,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:00:38,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:38,656 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:38,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 639445213, now seen corresponding path program 1 times [2024-11-08 17:00:38,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:38,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445753507] [2024-11-08 17:00:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:38,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:00:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:38,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 17:00:38,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:38,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 17:00:38,954 INFO L349 Elim1Store]: treesize reduction 48, result has 36.8 percent of original size [2024-11-08 17:00:38,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2024-11-08 17:00:38,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 17:00:39,014 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 27 treesize of output 11 [2024-11-08 17:00:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:39,032 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:39,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445753507] [2024-11-08 17:00:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445753507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:39,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:00:39,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030965064] [2024-11-08 17:00:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:39,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:00:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:00:39,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:00:39,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-08 17:00:39,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 43.833333333333336) internal successors, (263), 6 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:39,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:39,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-08 17:00:39,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:40,549 INFO L124 PetriNetUnfolderBase]: 66/288 cut-off events. [2024-11-08 17:00:40,550 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-08 17:00:40,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 288 events. 66/288 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1245 event pairs, 63 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 542. Up to 159 conditions per place. [2024-11-08 17:00:40,553 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2024-11-08 17:00:40,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 75 transitions, 363 flow [2024-11-08 17:00:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:00:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:00:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 327 transitions. [2024-11-08 17:00:40,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5913200723327305 [2024-11-08 17:00:40,555 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 285 flow. Second operand 7 states and 327 transitions. [2024-11-08 17:00:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 75 transitions, 363 flow [2024-11-08 17:00:40,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 75 transitions, 359 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:00:40,561 INFO L231 Difference]: Finished difference. Result has 97 places, 75 transitions, 291 flow [2024-11-08 17:00:40,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=97, PETRI_TRANSITIONS=75} [2024-11-08 17:00:40,562 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 19 predicate places. [2024-11-08 17:00:40,562 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 75 transitions, 291 flow [2024-11-08 17:00:40,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.833333333333336) internal successors, (263), 6 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:40,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:40,563 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:40,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:40,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:40,764 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:40,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash 639445214, now seen corresponding path program 1 times [2024-11-08 17:00:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007462712] [2024-11-08 17:00:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:40,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:40,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:40,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:00:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:40,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 17:00:40,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:40,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:00:40,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 17:00:41,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 17:00:41,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 17:00:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:00:41,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-08 17:00:41,152 INFO L349 Elim1Store]: treesize reduction 6, result has 66.7 percent of original size [2024-11-08 17:00:41,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-08 17:00:41,241 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 25 treesize of output 9 [2024-11-08 17:00:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:41,271 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:41,271 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007462712] [2024-11-08 17:00:41,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007462712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:41,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:41,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:00:41,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70070593] [2024-11-08 17:00:41,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:41,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:00:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:00:41,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:00:42,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 79 [2024-11-08 17:00:42,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 75 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 42.5) internal successors, (255), 6 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:42,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:42,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 79 [2024-11-08 17:00:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:43,013 INFO L124 PetriNetUnfolderBase]: 66/284 cut-off events. [2024-11-08 17:00:43,013 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-08 17:00:43,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 284 events. 66/284 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1215 event pairs, 63 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 543. Up to 159 conditions per place. [2024-11-08 17:00:43,016 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 31 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-08 17:00:43,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 73 transitions, 363 flow [2024-11-08 17:00:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:00:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:00:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 317 transitions. [2024-11-08 17:00:43,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5732368896925859 [2024-11-08 17:00:43,019 INFO L175 Difference]: Start difference. First operand has 97 places, 75 transitions, 291 flow. Second operand 7 states and 317 transitions. [2024-11-08 17:00:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 73 transitions, 363 flow [2024-11-08 17:00:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 73 transitions, 349 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:00:43,024 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 287 flow [2024-11-08 17:00:43,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-11-08 17:00:43,028 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2024-11-08 17:00:43,028 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 287 flow [2024-11-08 17:00:43,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.5) internal successors, (255), 6 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:43,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:43,029 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:43,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:00:43,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:43,230 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:43,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash 326545433, now seen corresponding path program 1 times [2024-11-08 17:00:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781321914] [2024-11-08 17:00:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:43,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:43,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:43,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:00:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:43,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 17:00:43,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:43,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:00:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:43,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:43,513 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781321914] [2024-11-08 17:00:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781321914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:00:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021274286] [2024-11-08 17:00:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:43,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:00:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:00:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:00:44,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2024-11-08 17:00:44,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:44,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:44,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2024-11-08 17:00:44,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:44,576 INFO L124 PetriNetUnfolderBase]: 66/282 cut-off events. [2024-11-08 17:00:44,577 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-08 17:00:44,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 282 events. 66/282 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1203 event pairs, 63 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 541. Up to 161 conditions per place. [2024-11-08 17:00:44,579 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 31 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-08 17:00:44,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 72 transitions, 361 flow [2024-11-08 17:00:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:00:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:00:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 259 transitions. [2024-11-08 17:00:44,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556962025316456 [2024-11-08 17:00:44,582 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 287 flow. Second operand 5 states and 259 transitions. [2024-11-08 17:00:44,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 72 transitions, 361 flow [2024-11-08 17:00:44,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 72 transitions, 347 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:00:44,587 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 285 flow [2024-11-08 17:00:44,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2024-11-08 17:00:44,588 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2024-11-08 17:00:44,588 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 285 flow [2024-11-08 17:00:44,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:44,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:44,589 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:44,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:44,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:44,790 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:44,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash 326545432, now seen corresponding path program 1 times [2024-11-08 17:00:44,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724769414] [2024-11-08 17:00:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:44,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:44,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:44,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:44,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:00:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:44,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:00:44,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:45,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:00:45,037 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724769414] [2024-11-08 17:00:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724769414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:00:45,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:00:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:00:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493014174] [2024-11-08 17:00:45,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:00:45,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:00:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:00:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:00:45,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2024-11-08 17:00:45,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:45,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:00:45,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2024-11-08 17:00:45,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:00:45,826 INFO L124 PetriNetUnfolderBase]: 66/280 cut-off events. [2024-11-08 17:00:45,826 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-08 17:00:45,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 280 events. 66/280 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1190 event pairs, 63 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 543. Up to 161 conditions per place. [2024-11-08 17:00:45,829 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 33 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-08 17:00:45,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 71 transitions, 363 flow [2024-11-08 17:00:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:00:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:00:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-08 17:00:45,831 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354430379746835 [2024-11-08 17:00:45,831 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 285 flow. Second operand 5 states and 251 transitions. [2024-11-08 17:00:45,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 71 transitions, 363 flow [2024-11-08 17:00:45,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 71 transitions, 349 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:00:45,835 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 283 flow [2024-11-08 17:00:45,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2024-11-08 17:00:45,836 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-11-08 17:00:45,836 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 283 flow [2024-11-08 17:00:45,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:00:45,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:00:45,837 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:00:45,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 17:00:46,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:46,038 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:00:46,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:00:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1151728204, now seen corresponding path program 1 times [2024-11-08 17:00:46,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:00:46,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855668738] [2024-11-08 17:00:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:00:46,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:00:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:00:46,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:00:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 17:00:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:00:46,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:00:46,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:00:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:00:46,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:00:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:00:46,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:00:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:00:46,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:00:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:47,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:00:47,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:00:47,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2024-11-08 17:00:52,027 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-08 17:00:52,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-08 17:00:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:00:58,847 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:00:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855668738] [2024-11-08 17:00:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855668738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:00:58,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:00:58,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-11-08 17:00:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33503783] [2024-11-08 17:00:58,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:00:58,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:00:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:00:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:00:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=109, Unknown=2, NotChecked=0, Total=156 [2024-11-08 17:01:03,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:07,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:12,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:15,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:19,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:24,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:28,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:32,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:37,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:42,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:46,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:50,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:01:54,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:00,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:05,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:09,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:14,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:14,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 79 [2024-11-08 17:02:14,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 283 flow. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:14,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:02:14,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 79 [2024-11-08 17:02:14,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:02:17,113 INFO L124 PetriNetUnfolderBase]: 254/657 cut-off events. [2024-11-08 17:02:17,113 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-08 17:02:17,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 657 events. 254/657 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3183 event pairs, 247 based on Foata normal form. 8/452 useless extension candidates. Maximal degree in co-relation 1359. Up to 547 conditions per place. [2024-11-08 17:02:17,117 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 89 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-08 17:02:17,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 109 transitions, 607 flow [2024-11-08 17:02:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:02:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:02:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-08 17:02:17,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3069620253164557 [2024-11-08 17:02:17,119 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 283 flow. Second operand 8 states and 194 transitions. [2024-11-08 17:02:17,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 109 transitions, 607 flow [2024-11-08 17:02:17,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 109 transitions, 553 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:02:17,123 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 316 flow [2024-11-08 17:02:17,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2024-11-08 17:02:17,125 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 17 predicate places. [2024-11-08 17:02:17,125 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 316 flow [2024-11-08 17:02:17,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:17,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:02:17,125 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:17,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 17:02:17,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:17,326 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:02:17,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash 268934809, now seen corresponding path program 1 times [2024-11-08 17:02:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:02:17,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958248997] [2024-11-08 17:02:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:17,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:17,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:17,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 17:02:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:17,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:02:17,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:17,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:02:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 17:02:17,622 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:02:17,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:02:17,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958248997] [2024-11-08 17:02:17,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958248997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:02:17,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:02:17,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:02:17,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980615489] [2024-11-08 17:02:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:02:17,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:02:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:02:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:02:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:02:17,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-08 17:02:17,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:17,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:02:17,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-08 17:02:17,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:02:18,189 INFO L124 PetriNetUnfolderBase]: 70/315 cut-off events. [2024-11-08 17:02:18,190 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-08 17:02:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 315 events. 70/315 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1302 event pairs, 56 based on Foata normal form. 8/286 useless extension candidates. Maximal degree in co-relation 610. Up to 175 conditions per place. [2024-11-08 17:02:18,193 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 48 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-08 17:02:18,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 426 flow [2024-11-08 17:02:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:02:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:02:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2024-11-08 17:02:18,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7763713080168776 [2024-11-08 17:02:18,195 INFO L175 Difference]: Start difference. First operand has 95 places, 75 transitions, 316 flow. Second operand 3 states and 184 transitions. [2024-11-08 17:02:18,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 426 flow [2024-11-08 17:02:18,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 421 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:02:18,200 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 311 flow [2024-11-08 17:02:18,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-11-08 17:02:18,201 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-08 17:02:18,201 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 311 flow [2024-11-08 17:02:18,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:18,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:02:18,202 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:18,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 17:02:18,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:18,403 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:02:18,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash 268934808, now seen corresponding path program 1 times [2024-11-08 17:02:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:02:18,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851514604] [2024-11-08 17:02:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:18,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:18,405 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:18,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 17:02:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:18,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:02:18,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:18,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-08 17:02:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-08 17:02:18,688 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:02:18,688 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:02:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851514604] [2024-11-08 17:02:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851514604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:02:18,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:02:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:02:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983934074] [2024-11-08 17:02:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:02:18,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:02:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:02:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:02:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:02:18,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 17:02:18,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:18,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:02:18,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 17:02:18,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:02:19,197 INFO L124 PetriNetUnfolderBase]: 77/306 cut-off events. [2024-11-08 17:02:19,197 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-11-08 17:02:19,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 306 events. 77/306 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1184 event pairs, 56 based on Foata normal form. 8/284 useless extension candidates. Maximal degree in co-relation 630. Up to 175 conditions per place. [2024-11-08 17:02:19,200 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 49 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-08 17:02:19,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 423 flow [2024-11-08 17:02:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:02:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:02:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-08 17:02:19,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7679324894514767 [2024-11-08 17:02:19,202 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 311 flow. Second operand 3 states and 182 transitions. [2024-11-08 17:02:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 423 flow [2024-11-08 17:02:19,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:02:19,208 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 307 flow [2024-11-08 17:02:19,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2024-11-08 17:02:19,209 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-11-08 17:02:19,209 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 307 flow [2024-11-08 17:02:19,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:19,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:02:19,210 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:02:19,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 17:02:19,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:19,410 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:02:19,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash 267755001, now seen corresponding path program 1 times [2024-11-08 17:02:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:02:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128709022] [2024-11-08 17:02:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:02:19,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:19,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 17:02:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:02:19,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:02:19,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:02:19,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:02:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:02:19,953 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:02:19,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128709022] [2024-11-08 17:02:19,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128709022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:02:19,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:02:19,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-08 17:02:19,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696930223] [2024-11-08 17:02:19,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:02:19,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:02:19,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:02:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:02:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:02:20,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-08 17:02:20,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 307 flow. Second operand has 8 states, 8 states have (on average 53.25) internal successors, (426), 8 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:20,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:02:20,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-08 17:02:20,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:02:20,974 INFO L124 PetriNetUnfolderBase]: 65/308 cut-off events. [2024-11-08 17:02:20,974 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-11-08 17:02:20,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 308 events. 65/308 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 969 event pairs, 63 based on Foata normal form. 8/286 useless extension candidates. Maximal degree in co-relation 631. Up to 158 conditions per place. [2024-11-08 17:02:20,976 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 72 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2024-11-08 17:02:20,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 105 transitions, 544 flow [2024-11-08 17:02:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:02:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:02:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2024-11-08 17:02:20,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7325949367088608 [2024-11-08 17:02:20,979 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 307 flow. Second operand 8 states and 463 transitions. [2024-11-08 17:02:20,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 105 transitions, 544 flow [2024-11-08 17:02:20,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 105 transitions, 530 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-08 17:02:20,983 INFO L231 Difference]: Finished difference. Result has 101 places, 71 transitions, 331 flow [2024-11-08 17:02:20,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=101, PETRI_TRANSITIONS=71} [2024-11-08 17:02:20,984 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2024-11-08 17:02:20,984 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 71 transitions, 331 flow [2024-11-08 17:02:20,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 53.25) internal successors, (426), 8 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:02:20,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:02:20,984 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2024-11-08 17:02:21,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 17:02:21,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:21,185 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 17:02:21,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:02:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash 575271559, now seen corresponding path program 2 times [2024-11-08 17:02:21,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:02:21,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999813659] [2024-11-08 17:02:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:02:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:02:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:02:21,187 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:02:21,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0f4a70-e0c6-4a01-9300-6b33ae47ee51/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 17:02:21,671 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:02:21,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:02:21,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 17:02:21,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:02:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:22,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:22,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:22,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:22,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:22,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:23,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:23,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:23,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:23,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:02:23,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 17:02:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:02:24,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:02:28,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:02:28,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2024-11-08 17:02:29,179 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-08 17:02:29,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-08 17:02:34,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:02:34,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 102 [2024-11-08 17:02:35,195 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-08 17:02:35,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-08 17:02:36,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:02:36,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 102 [2024-11-08 17:02:37,498 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-08 17:02:37,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-08 17:02:39,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:02:39,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 102 [2024-11-08 17:02:39,626 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-08 17:02:39,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-08 17:02:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 17:02:42,766 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:02:42,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999813659] [2024-11-08 17:02:42,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999813659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:02:42,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:02:42,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2024-11-08 17:02:42,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112865814] [2024-11-08 17:02:42,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:02:42,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 17:02:42,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:02:42,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 17:02:42,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=455, Unknown=1, NotChecked=0, Total=600 [2024-11-08 17:02:45,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:51,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:02:56,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:04,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:09,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:15,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:20,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:25,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:32,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:38,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:43,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:50,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:03:55,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:04:00,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:04:06,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]