./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB --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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:30:52,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:30:52,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:30:52,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:30:52,308 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:30:52,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:30:52,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:30:52,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:30:52,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:30:52,346 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:30:52,347 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:30:52,347 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:30:52,347 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:30:52,348 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:30:52,348 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:30:52,349 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:30:52,349 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:30:52,350 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:30:52,350 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:52,351 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:30:52,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:30:52,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:52,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:30:52,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:30:52,352 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:30:52,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:30:52,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:30:52,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:30:52,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:30:52,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:30:52,353 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-11-28 04:30:52,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:30:52,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:30:52,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:30:52,709 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:30:52,711 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:30:52,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-28 04:30:55,782 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/data/31c84cec9/621345bdf07f4767a02de3e0c45b2381/FLAG343aefd6f [2024-11-28 04:30:56,096 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:30:56,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-11-28 04:30:56,105 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/data/31c84cec9/621345bdf07f4767a02de3e0c45b2381/FLAG343aefd6f [2024-11-28 04:30:56,120 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/data/31c84cec9/621345bdf07f4767a02de3e0c45b2381 [2024-11-28 04:30:56,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:30:56,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:30:56,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:30:56,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:30:56,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:30:56,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c792d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56, skipping insertion in model container [2024-11-28 04:30:56,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,154 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:30:56,376 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:30:56,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:30:56,401 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:30:56,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:30:56,460 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:30:56,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56 WrapperNode [2024-11-28 04:30:56,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:30:56,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:30:56,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:30:56,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:30:56,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,522 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 196 [2024-11-28 04:30:56,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:30:56,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:30:56,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:30:56,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:30:56,536 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,540 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,565 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 04:30:56,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,577 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:30:56,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:30:56,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:30:56,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:30:56,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (1/1) ... [2024-11-28 04:30:56,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:30:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:30:56,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:30:56,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:30:56,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:30:56,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:30:56,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:30:56,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:30:56,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:30:56,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:30:56,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:30:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:30:56,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:30:56,665 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:30:56,768 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:30:56,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:30:57,238 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:30:57,238 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:30:57,677 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:30:57,678 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:30:57,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:30:57 BoogieIcfgContainer [2024-11-28 04:30:57,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:30:57,682 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:30:57,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:30:57,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:30:57,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:30:56" (1/3) ... [2024-11-28 04:30:57,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325abae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:30:57, skipping insertion in model container [2024-11-28 04:30:57,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:30:56" (2/3) ... [2024-11-28 04:30:57,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325abae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:30:57, skipping insertion in model container [2024-11-28 04:30:57,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:30:57" (3/3) ... [2024-11-28 04:30:57,694 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-11-28 04:30:57,711 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:30:57,713 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-two-queue.wvr.c that has 3 procedures, 41 locations, 1 initial locations, 4 loop locations, and 14 error locations. [2024-11-28 04:30:57,713 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:30:57,782 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:30:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-11-28 04:30:57,871 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-11-28 04:30:57,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:30:57,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-28 04:30:57,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-11-28 04:30:57,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 94 flow [2024-11-28 04:30:57,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:30:57,915 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;@3f2bd16f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:30:57,915 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-28 04:30:57,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:30:57,922 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 04:30:57,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:30:57,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:30:57,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:30:57,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:30:57,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:57,932 INFO L85 PathProgramCache]: Analyzing trace with hash 635538, now seen corresponding path program 1 times [2024-11-28 04:30:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:57,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79872343] [2024-11-28 04:30:57,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:57,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:58,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79872343] [2024-11-28 04:30:58,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79872343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:58,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:58,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:30:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305731177] [2024-11-28 04:30:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:58,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:30:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:58,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:30:58,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:30:58,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:30:58,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:58,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:30:58,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:30:58,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:30:58,638 INFO L124 PetriNetUnfolderBase]: 359/589 cut-off events. [2024-11-28 04:30:58,638 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-28 04:30:58,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 589 events. 359/589 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2752 event pairs, 219 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1090. Up to 544 conditions per place. [2024-11-28 04:30:58,651 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-28 04:30:58,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 146 flow [2024-11-28 04:30:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:30:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:30:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-11-28 04:30:58,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-28 04:30:58,670 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-11-28 04:30:58,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 146 flow [2024-11-28 04:30:58,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:30:58,680 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 82 flow [2024-11-28 04:30:58,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-11-28 04:30:58,687 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-11-28 04:30:58,687 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 82 flow [2024-11-28 04:30:58,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:58,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:30:58,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:30:58,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:30:58,688 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:30:58,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash 635539, now seen corresponding path program 1 times [2024-11-28 04:30:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:58,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527125405] [2024-11-28 04:30:58,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:59,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527125405] [2024-11-28 04:30:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527125405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:59,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:59,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:30:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246065686] [2024-11-28 04:30:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:59,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:30:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:59,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:30:59,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:30:59,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:30:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:59,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:30:59,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:30:59,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:30:59,444 INFO L124 PetriNetUnfolderBase]: 360/592 cut-off events. [2024-11-28 04:30:59,445 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:30:59,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 592 events. 360/592 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2772 event pairs, 219 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 1132. Up to 553 conditions per place. [2024-11-28 04:30:59,454 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-28 04:30:59,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 158 flow [2024-11-28 04:30:59,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:30:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:30:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-28 04:30:59,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-28 04:30:59,457 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 82 flow. Second operand 4 states and 76 transitions. [2024-11-28 04:30:59,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 158 flow [2024-11-28 04:30:59,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:30:59,462 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 105 flow [2024-11-28 04:30:59,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2024-11-28 04:30:59,463 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-11-28 04:30:59,463 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 105 flow [2024-11-28 04:30:59,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:59,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:30:59,463 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 04:30:59,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:30:59,464 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:30:59,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:30:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash 19703620, now seen corresponding path program 1 times [2024-11-28 04:30:59,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:30:59,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734193359] [2024-11-28 04:30:59,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:30:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:30:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:30:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:30:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:30:59,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734193359] [2024-11-28 04:30:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734193359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:30:59,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:30:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:30:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158069232] [2024-11-28 04:30:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:30:59,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:30:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:30:59,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:30:59,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:30:59,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:30:59,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:30:59,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:30:59,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:30:59,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:00,118 INFO L124 PetriNetUnfolderBase]: 361/595 cut-off events. [2024-11-28 04:31:00,118 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:31:00,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 595 events. 361/595 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2789 event pairs, 219 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 1153. Up to 552 conditions per place. [2024-11-28 04:31:00,124 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 31 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-28 04:31:00,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 187 flow [2024-11-28 04:31:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:31:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:31:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-28 04:31:00,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-11-28 04:31:00,126 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 105 flow. Second operand 5 states and 89 transitions. [2024-11-28 04:31:00,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 187 flow [2024-11-28 04:31:00,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:31:00,128 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 139 flow [2024-11-28 04:31:00,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-11-28 04:31:00,131 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-11-28 04:31:00,131 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 139 flow [2024-11-28 04:31:00,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:00,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:00,132 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 04:31:00,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:31:00,132 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:00,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash 610772517, now seen corresponding path program 1 times [2024-11-28 04:31:00,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:00,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313062999] [2024-11-28 04:31:00,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:00,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313062999] [2024-11-28 04:31:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313062999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160899391] [2024-11-28 04:31:00,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:00,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:00,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:31:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:00,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:31:00,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:00,700 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 10 treesize of output 9 [2024-11-28 04:31:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:00,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160899391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:01,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 04:31:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435906127] [2024-11-28 04:31:01,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:01,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:31:01,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:01,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:31:01,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:31:01,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:31:01,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 139 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:01,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:01,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:31:01,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:01,665 INFO L124 PetriNetUnfolderBase]: 361/594 cut-off events. [2024-11-28 04:31:01,665 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-28 04:31:01,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 594 events. 361/594 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2804 event pairs, 219 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 1163. Up to 552 conditions per place. [2024-11-28 04:31:01,669 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-11-28 04:31:01,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 209 flow [2024-11-28 04:31:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:31:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-11-28 04:31:01,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35984848484848486 [2024-11-28 04:31:01,671 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 139 flow. Second operand 6 states and 95 transitions. [2024-11-28 04:31:01,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 209 flow [2024-11-28 04:31:01,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:31:01,673 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 148 flow [2024-11-28 04:31:01,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-28 04:31:01,674 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-28 04:31:01,674 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 148 flow [2024-11-28 04:31:01,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:01,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:01,674 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 04:31:01,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:31:01,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:01,878 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:01,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1755330054, now seen corresponding path program 1 times [2024-11-28 04:31:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:01,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946028722] [2024-11-28 04:31:01,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:02,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:02,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946028722] [2024-11-28 04:31:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946028722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:02,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570987949] [2024-11-28 04:31:02,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:02,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:31:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:02,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:31:02,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:02,334 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 10 treesize of output 9 [2024-11-28 04:31:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:02,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:02,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570987949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:02,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:02,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 04:31:02,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552610439] [2024-11-28 04:31:02,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:02,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:31:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:02,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:31:02,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:31:02,948 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:31:02,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 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) [2024-11-28 04:31:02,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:02,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:31:02,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:03,499 INFO L124 PetriNetUnfolderBase]: 363/599 cut-off events. [2024-11-28 04:31:03,499 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-28 04:31:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 599 events. 363/599 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2825 event pairs, 219 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 1171. Up to 545 conditions per place. [2024-11-28 04:31:03,503 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 24 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-28 04:31:03,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 261 flow [2024-11-28 04:31:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:31:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 04:31:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-11-28 04:31:03,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-11-28 04:31:03,505 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 148 flow. Second operand 9 states and 134 transitions. [2024-11-28 04:31:03,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 261 flow [2024-11-28 04:31:03,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 214 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-28 04:31:03,507 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 166 flow [2024-11-28 04:31:03,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=166, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-28 04:31:03,508 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-11-28 04:31:03,508 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 166 flow [2024-11-28 04:31:03,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 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) [2024-11-28 04:31:03,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:03,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:03,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:31:03,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:03,713 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:03,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1416775571, now seen corresponding path program 1 times [2024-11-28 04:31:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691942168] [2024-11-28 04:31:03,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691942168] [2024-11-28 04:31:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691942168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:03,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:31:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157340633] [2024-11-28 04:31:03,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:03,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:03,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:03,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:03,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:03,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:03,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:03,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:04,000 INFO L124 PetriNetUnfolderBase]: 385/660 cut-off events. [2024-11-28 04:31:04,000 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 04:31:04,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 660 events. 385/660 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3300 event pairs, 242 based on Foata normal form. 16/432 useless extension candidates. Maximal degree in co-relation 1140. Up to 557 conditions per place. [2024-11-28 04:31:04,004 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 5 changer transitions 1/59 dead transitions. [2024-11-28 04:31:04,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 302 flow [2024-11-28 04:31:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:31:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-28 04:31:04,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-28 04:31:04,006 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 166 flow. Second operand 4 states and 99 transitions. [2024-11-28 04:31:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 302 flow [2024-11-28 04:31:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 269 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-28 04:31:04,008 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 156 flow [2024-11-28 04:31:04,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-11-28 04:31:04,011 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-11-28 04:31:04,011 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 156 flow [2024-11-28 04:31:04,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:04,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:04,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:04,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:31:04,012 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:04,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1814010475, now seen corresponding path program 1 times [2024-11-28 04:31:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:04,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634771746] [2024-11-28 04:31:04,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:04,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:04,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634771746] [2024-11-28 04:31:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634771746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975455373] [2024-11-28 04:31:04,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:04,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:04,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:04,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:31:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:04,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:31:04,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:04,440 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:04,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975455373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:04,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:31:04,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-28 04:31:04,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293304565] [2024-11-28 04:31:04,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:04,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:31:04,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:04,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:31:04,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:31:04,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:04,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:04,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:04,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:04,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:04,606 INFO L124 PetriNetUnfolderBase]: 307/543 cut-off events. [2024-11-28 04:31:04,606 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-28 04:31:04,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 543 events. 307/543 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2577 event pairs, 194 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1020. Up to 485 conditions per place. [2024-11-28 04:31:04,609 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 34 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-11-28 04:31:04,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 228 flow [2024-11-28 04:31:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:31:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-28 04:31:04,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-28 04:31:04,611 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 156 flow. Second operand 4 states and 78 transitions. [2024-11-28 04:31:04,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 228 flow [2024-11-28 04:31:04,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:31:04,613 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 156 flow [2024-11-28 04:31:04,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-28 04:31:04,613 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-11-28 04:31:04,613 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 156 flow [2024-11-28 04:31:04,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:04,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:04,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:04,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:31:04,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:04,821 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:04,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash -28939054, now seen corresponding path program 1 times [2024-11-28 04:31:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:04,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650792546] [2024-11-28 04:31:04,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:04,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:04,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:04,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650792546] [2024-11-28 04:31:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650792546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:04,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:31:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721817744] [2024-11-28 04:31:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:04,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:04,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:04,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:04,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:04,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:04,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:04,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:04,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:05,127 INFO L124 PetriNetUnfolderBase]: 336/642 cut-off events. [2024-11-28 04:31:05,127 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-28 04:31:05,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 642 events. 336/642 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3391 event pairs, 222 based on Foata normal form. 12/476 useless extension candidates. Maximal degree in co-relation 1002. Up to 499 conditions per place. [2024-11-28 04:31:05,131 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 54 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2024-11-28 04:31:05,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 352 flow [2024-11-28 04:31:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:31:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:31:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-28 04:31:05,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-11-28 04:31:05,135 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 156 flow. Second operand 5 states and 114 transitions. [2024-11-28 04:31:05,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 352 flow [2024-11-28 04:31:05,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:31:05,138 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 191 flow [2024-11-28 04:31:05,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-28 04:31:05,140 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-11-28 04:31:05,140 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 191 flow [2024-11-28 04:31:05,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:05,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:05,140 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:05,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 04:31:05,140 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:05,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1814010474, now seen corresponding path program 1 times [2024-11-28 04:31:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179753982] [2024-11-28 04:31:05,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:05,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179753982] [2024-11-28 04:31:05,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179753982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:05,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:05,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:31:05,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758335962] [2024-11-28 04:31:05,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:05,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:05,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:05,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:05,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:31:05,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:05,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:31:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:05,359 INFO L124 PetriNetUnfolderBase]: 262/525 cut-off events. [2024-11-28 04:31:05,359 INFO L125 PetriNetUnfolderBase]: For 97/145 co-relation queries the response was YES. [2024-11-28 04:31:05,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 525 events. 262/525 cut-off events. For 97/145 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2681 event pairs, 174 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 1053. Up to 448 conditions per place. [2024-11-28 04:31:05,365 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 35 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-11-28 04:31:05,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 263 flow [2024-11-28 04:31:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:31:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-28 04:31:05,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-28 04:31:05,366 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 191 flow. Second operand 4 states and 68 transitions. [2024-11-28 04:31:05,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 263 flow [2024-11-28 04:31:05,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:31:05,368 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 188 flow [2024-11-28 04:31:05,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-11-28 04:31:05,369 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-11-28 04:31:05,369 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 188 flow [2024-11-28 04:31:05,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:05,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:05,369 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:05,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:31:05,369 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:05,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1584392932, now seen corresponding path program 1 times [2024-11-28 04:31:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:05,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967700055] [2024-11-28 04:31:05,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:05,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967700055] [2024-11-28 04:31:05,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967700055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:05,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878046713] [2024-11-28 04:31:05,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:05,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:05,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:05,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:31:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:05,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:31:05,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:05,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:31:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:31:05,775 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 18 treesize of output 13 [2024-11-28 04:31:05,796 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:31:05,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:31:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:05,842 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:31:05,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878046713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:05,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:31:05,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-28 04:31:05,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782016071] [2024-11-28 04:31:05,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:05,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:31:05,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:05,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:31:05,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:31:05,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:31:05,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:05,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:05,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:31:05,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:05,995 INFO L124 PetriNetUnfolderBase]: 198/423 cut-off events. [2024-11-28 04:31:05,995 INFO L125 PetriNetUnfolderBase]: For 91/115 co-relation queries the response was YES. [2024-11-28 04:31:05,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 423 events. 198/423 cut-off events. For 91/115 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2075 event pairs, 132 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 648. Up to 365 conditions per place. [2024-11-28 04:31:05,998 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-28 04:31:05,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 256 flow [2024-11-28 04:31:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:31:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:31:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-28 04:31:05,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-28 04:31:05,999 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 188 flow. Second operand 4 states and 66 transitions. [2024-11-28 04:31:05,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 256 flow [2024-11-28 04:31:06,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:31:06,001 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 182 flow [2024-11-28 04:31:06,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-28 04:31:06,002 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-28 04:31:06,002 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 182 flow [2024-11-28 04:31:06,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:06,002 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:06,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:31:06,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:06,203 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:06,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1584392931, now seen corresponding path program 1 times [2024-11-28 04:31:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571547824] [2024-11-28 04:31:06,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:31:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:06,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571547824] [2024-11-28 04:31:06,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571547824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:06,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:06,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:31:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609331945] [2024-11-28 04:31:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:06,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:31:06,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:06,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:31:06,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:31:06,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:31:06,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:06,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:31:06,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:06,426 INFO L124 PetriNetUnfolderBase]: 144/335 cut-off events. [2024-11-28 04:31:06,427 INFO L125 PetriNetUnfolderBase]: For 75/83 co-relation queries the response was YES. [2024-11-28 04:31:06,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 335 events. 144/335 cut-off events. For 75/83 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1604 event pairs, 96 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 544. Up to 266 conditions per place. [2024-11-28 04:31:06,430 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-11-28 04:31:06,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 246 flow [2024-11-28 04:31:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:31:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:31:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-28 04:31:06,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-28 04:31:06,431 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 182 flow. Second operand 5 states and 74 transitions. [2024-11-28 04:31:06,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 246 flow [2024-11-28 04:31:06,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:31:06,434 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 185 flow [2024-11-28 04:31:06,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-11-28 04:31:06,436 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-28 04:31:06,437 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 185 flow [2024-11-28 04:31:06,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:06,438 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:06,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 04:31:06,438 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:06,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1006072961, now seen corresponding path program 1 times [2024-11-28 04:31:06,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:06,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533974962] [2024-11-28 04:31:06,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:06,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533974962] [2024-11-28 04:31:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533974962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:31:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272321054] [2024-11-28 04:31:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:06,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:31:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:06,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:31:06,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:31:06,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:06,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:06,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:06,644 INFO L124 PetriNetUnfolderBase]: 180/397 cut-off events. [2024-11-28 04:31:06,645 INFO L125 PetriNetUnfolderBase]: For 93/101 co-relation queries the response was YES. [2024-11-28 04:31:06,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 397 events. 180/397 cut-off events. For 93/101 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1909 event pairs, 61 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 708. Up to 181 conditions per place. [2024-11-28 04:31:06,647 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 39 selfloop transitions, 3 changer transitions 5/52 dead transitions. [2024-11-28 04:31:06,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 312 flow [2024-11-28 04:31:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:31:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:31:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-28 04:31:06,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-28 04:31:06,648 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 185 flow. Second operand 3 states and 70 transitions. [2024-11-28 04:31:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 312 flow [2024-11-28 04:31:06,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:31:06,650 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 155 flow [2024-11-28 04:31:06,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2024-11-28 04:31:06,651 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-28 04:31:06,651 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 155 flow [2024-11-28 04:31:06,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:06,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:06,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:31:06,652 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:06,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1480679834, now seen corresponding path program 1 times [2024-11-28 04:31:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173177300] [2024-11-28 04:31:06,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:31:06,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:06,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173177300] [2024-11-28 04:31:06,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173177300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:06,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:31:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958565233] [2024-11-28 04:31:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:06,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:31:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:06,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:31:06,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:31:06,736 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:06,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:06,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:06,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:06,818 INFO L124 PetriNetUnfolderBase]: 107/218 cut-off events. [2024-11-28 04:31:06,819 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-28 04:31:06,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 218 events. 107/218 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 749 event pairs, 22 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 521. Up to 143 conditions per place. [2024-11-28 04:31:06,821 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 37 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2024-11-28 04:31:06,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 257 flow [2024-11-28 04:31:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:31:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:31:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-28 04:31:06,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 04:31:06,822 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 155 flow. Second operand 3 states and 66 transitions. [2024-11-28 04:31:06,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 257 flow [2024-11-28 04:31:06,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 252 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-28 04:31:06,824 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 164 flow [2024-11-28 04:31:06,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-11-28 04:31:06,825 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-11-28 04:31:06,825 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 164 flow [2024-11-28 04:31:06,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:06,825 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:06,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 04:31:06,826 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:06,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1850092364, now seen corresponding path program 1 times [2024-11-28 04:31:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:06,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814420430] [2024-11-28 04:31:06,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:31:06,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:06,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814420430] [2024-11-28 04:31:06,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814420430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:06,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:06,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:31:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889827589] [2024-11-28 04:31:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:06,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:31:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:06,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:31:06,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:31:06,898 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 04:31:06,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:06,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 04:31:06,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:31:06,979 INFO L124 PetriNetUnfolderBase]: 82/178 cut-off events. [2024-11-28 04:31:06,979 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-11-28 04:31:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 178 events. 82/178 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 520 event pairs, 28 based on Foata normal form. 5/173 useless extension candidates. Maximal degree in co-relation 439. Up to 112 conditions per place. [2024-11-28 04:31:06,981 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 38 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2024-11-28 04:31:06,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 280 flow [2024-11-28 04:31:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:31:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:31:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-28 04:31:06,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-28 04:31:06,982 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 164 flow. Second operand 3 states and 68 transitions. [2024-11-28 04:31:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 280 flow [2024-11-28 04:31:06,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 273 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-28 04:31:06,984 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 174 flow [2024-11-28 04:31:06,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-11-28 04:31:06,985 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-11-28 04:31:06,985 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 174 flow [2024-11-28 04:31:06,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:06,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:31:06,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:06,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 04:31:06,986 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:31:06,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:06,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2063150415, now seen corresponding path program 1 times [2024-11-28 04:31:06,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:06,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344047440] [2024-11-28 04:31:06,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:06,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344047440] [2024-11-28 04:31:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344047440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:08,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576114555] [2024-11-28 04:31:08,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:08,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:08,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:31:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:08,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 04:31:08,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:08,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:31:08,935 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 [2024-11-28 04:31:09,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:31:09,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:31:09,116 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 23 treesize of output 1 [2024-11-28 04:31:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:09,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:16,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:31:16,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 192 [2024-11-28 04:31:16,836 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 216 treesize of output 210 [2024-11-28 04:31:16,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:31:16,865 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 154 treesize of output 144 [2024-11-28 04:31:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576114555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:17,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:17,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-11-28 04:31:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73528593] [2024-11-28 04:31:17,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:17,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 04:31:17,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:17,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 04:31:17,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1413, Unknown=1, NotChecked=0, Total=1640 [2024-11-28 04:31:22,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:31:26,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:31:30,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:31:30,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2024-11-28 04:31:30,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 174 flow. Second operand has 41 states, 41 states have (on average 6.682926829268292) internal successors, (274), 41 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:30,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:31:30,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2024-11-28 04:31:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:32:02,142 INFO L124 PetriNetUnfolderBase]: 1102/2066 cut-off events. [2024-11-28 04:32:02,142 INFO L125 PetriNetUnfolderBase]: For 1128/1128 co-relation queries the response was YES. [2024-11-28 04:32:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5530 conditions, 2066 events. 1102/2066 cut-off events. For 1128/1128 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11152 event pairs, 44 based on Foata normal form. 7/1787 useless extension candidates. Maximal degree in co-relation 5301. Up to 379 conditions per place. [2024-11-28 04:32:02,152 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 316 selfloop transitions, 326 changer transitions 28/673 dead transitions. [2024-11-28 04:32:02,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 673 transitions, 3620 flow [2024-11-28 04:32:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-11-28 04:32:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2024-11-28 04:32:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 1364 transitions. [2024-11-28 04:32:02,160 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22794117647058823 [2024-11-28 04:32:02,160 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 174 flow. Second operand 136 states and 1364 transitions. [2024-11-28 04:32:02,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 673 transitions, 3620 flow [2024-11-28 04:32:02,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 673 transitions, 3599 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-28 04:32:02,175 INFO L231 Difference]: Finished difference. Result has 234 places, 400 transitions, 2714 flow [2024-11-28 04:32:02,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=2714, PETRI_PLACES=234, PETRI_TRANSITIONS=400} [2024-11-28 04:32:02,175 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-11-28 04:32:02,176 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 400 transitions, 2714 flow [2024-11-28 04:32:02,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.682926829268292) internal successors, (274), 41 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:02,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:32:02,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:02,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:32:02,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:02,380 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:32:02,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash -306836741, now seen corresponding path program 2 times [2024-11-28 04:32:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829903838] [2024-11-28 04:32:02,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:32:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:02,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:32:02,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:32:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829903838] [2024-11-28 04:32:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829903838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71899811] [2024-11-28 04:32:04,013 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:32:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:04,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:04,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:32:04,108 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:32:04,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:04,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:32:04,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:04,254 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 [2024-11-28 04:32:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:32:04,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:05,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:05,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 145 [2024-11-28 04:32:05,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:05,279 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 33 treesize of output 29 [2024-11-28 04:32:05,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:05,390 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 51 treesize of output 47 [2024-11-28 04:32:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:32:05,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71899811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:05,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:05,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 32 [2024-11-28 04:32:05,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563116350] [2024-11-28 04:32:05,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:05,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:32:05,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:05,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:32:05,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:32:06,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:32:06,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 400 transitions, 2714 flow. Second operand has 33 states, 33 states have (on average 12.090909090909092) internal successors, (399), 33 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:06,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:32:06,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:32:06,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:32:11,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:32:15,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:32:19,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:32:23,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:32:27,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:32:29,321 INFO L124 PetriNetUnfolderBase]: 1293/2401 cut-off events. [2024-11-28 04:32:29,321 INFO L125 PetriNetUnfolderBase]: For 64648/64648 co-relation queries the response was YES. [2024-11-28 04:32:29,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13920 conditions, 2401 events. 1293/2401 cut-off events. For 64648/64648 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13406 event pairs, 100 based on Foata normal form. 3/2335 useless extension candidates. Maximal degree in co-relation 13717. Up to 1246 conditions per place. [2024-11-28 04:32:29,340 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 335 selfloop transitions, 195 changer transitions 11/544 dead transitions. [2024-11-28 04:32:29,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 544 transitions, 4876 flow [2024-11-28 04:32:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:32:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 04:32:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 453 transitions. [2024-11-28 04:32:29,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3550156739811912 [2024-11-28 04:32:29,342 INFO L175 Difference]: Start difference. First operand has 234 places, 400 transitions, 2714 flow. Second operand 29 states and 453 transitions. [2024-11-28 04:32:29,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 544 transitions, 4876 flow [2024-11-28 04:32:29,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 544 transitions, 4178 flow, removed 343 selfloop flow, removed 6 redundant places. [2024-11-28 04:32:29,513 INFO L231 Difference]: Finished difference. Result has 259 places, 458 transitions, 2987 flow [2024-11-28 04:32:29,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2987, PETRI_PLACES=259, PETRI_TRANSITIONS=458} [2024-11-28 04:32:29,516 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-11-28 04:32:29,518 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 458 transitions, 2987 flow [2024-11-28 04:32:29,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.090909090909092) internal successors, (399), 33 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:29,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:32:29,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:29,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:32:29,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:29,719 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:32:29,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash -424781215, now seen corresponding path program 3 times [2024-11-28 04:32:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552223780] [2024-11-28 04:32:29,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:32:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:29,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:32:29,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:32:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552223780] [2024-11-28 04:32:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552223780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729722836] [2024-11-28 04:32:31,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:32:31,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:31,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:31,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:31,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:32:31,557 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:32:31,557 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:31,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:32:31,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:31,697 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 [2024-11-28 04:32:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:32:32,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:32,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:32,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 145 [2024-11-28 04:32:32,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:32,903 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 33 treesize of output 29 [2024-11-28 04:32:33,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:32:33,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 195 treesize of output 256 [2024-11-28 04:32:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:32:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729722836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:35,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2024-11-28 04:32:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767710960] [2024-11-28 04:32:35,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:35,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:32:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:35,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:32:35,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:32:36,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:32:36,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 458 transitions, 2987 flow. Second operand has 34 states, 34 states have (on average 12.029411764705882) internal successors, (409), 34 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:36,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:32:36,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:32:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:32:41,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:32:43,881 INFO L124 PetriNetUnfolderBase]: 1669/3065 cut-off events. [2024-11-28 04:32:43,882 INFO L125 PetriNetUnfolderBase]: For 84028/84028 co-relation queries the response was YES. [2024-11-28 04:32:43,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17681 conditions, 3065 events. 1669/3065 cut-off events. For 84028/84028 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18330 event pairs, 168 based on Foata normal form. 6/2971 useless extension candidates. Maximal degree in co-relation 17378. Up to 1440 conditions per place. [2024-11-28 04:32:43,921 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 392 selfloop transitions, 260 changer transitions 10/665 dead transitions. [2024-11-28 04:32:43,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 665 transitions, 5961 flow [2024-11-28 04:32:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:32:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 04:32:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 549 transitions. [2024-11-28 04:32:43,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3564935064935065 [2024-11-28 04:32:43,927 INFO L175 Difference]: Start difference. First operand has 259 places, 458 transitions, 2987 flow. Second operand 35 states and 549 transitions. [2024-11-28 04:32:43,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 665 transitions, 5961 flow [2024-11-28 04:32:44,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 665 transitions, 5811 flow, removed 37 selfloop flow, removed 16 redundant places. [2024-11-28 04:32:44,112 INFO L231 Difference]: Finished difference. Result has 286 places, 544 transitions, 4181 flow [2024-11-28 04:32:44,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4181, PETRI_PLACES=286, PETRI_TRANSITIONS=544} [2024-11-28 04:32:44,113 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-11-28 04:32:44,113 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 544 transitions, 4181 flow [2024-11-28 04:32:44,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.029411764705882) internal successors, (409), 34 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:44,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:32:44,113 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:44,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:32:44,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:44,314 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:32:44,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash 758609825, now seen corresponding path program 4 times [2024-11-28 04:32:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:44,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548509400] [2024-11-28 04:32:44,315 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:32:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:44,349 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:32:44,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:32:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548509400] [2024-11-28 04:32:45,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548509400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535353002] [2024-11-28 04:32:45,311 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:32:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:45,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:45,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:32:45,411 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:32:45,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:45,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:32:45,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:45,424 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 [2024-11-28 04:32:45,524 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 [2024-11-28 04:32:45,613 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:32:45,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:32:45,761 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 23 treesize of output 1 [2024-11-28 04:32:46,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2024-11-28 04:32:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:32:46,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:32:52,902 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 04:32:52,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 137 [2024-11-28 04:32:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:32:52,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 117 [2024-11-28 04:32:52,927 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 66 treesize of output 54 [2024-11-28 04:32:52,977 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 04:32:52,977 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 102 treesize of output 82 [2024-11-28 04:32:53,482 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:32:53,549 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-28 04:32:53,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 108 [2024-11-28 04:32:53,562 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 04:32:53,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 88 [2024-11-28 04:32:53,570 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 20 treesize of output 14 [2024-11-28 04:32:53,627 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-28 04:32:53,627 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 70 treesize of output 62 [2024-11-28 04:32:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:32:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535353002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:54,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 35 [2024-11-28 04:32:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494499618] [2024-11-28 04:32:54,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:54,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:32:54,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:54,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:32:54,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1131, Unknown=1, NotChecked=0, Total=1260 [2024-11-28 04:32:58,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:02,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:06,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:06,861 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2024-11-28 04:33:06,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 544 transitions, 4181 flow. Second operand has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:33:06,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:33:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2024-11-28 04:33:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:33:11,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:15,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:22,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:26,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:30,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:32,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:33:37,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:09,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:34:17,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:21,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:27,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:31,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:41,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:34:45,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:35:08,071 INFO L124 PetriNetUnfolderBase]: 2103/3851 cut-off events. [2024-11-28 04:35:08,071 INFO L125 PetriNetUnfolderBase]: For 106125/106125 co-relation queries the response was YES. [2024-11-28 04:35:08,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23511 conditions, 3851 events. 2103/3851 cut-off events. For 106125/106125 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24100 event pairs, 137 based on Foata normal form. 15/3796 useless extension candidates. Maximal degree in co-relation 23165. Up to 1388 conditions per place. [2024-11-28 04:35:08,102 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 312 selfloop transitions, 504 changer transitions 11/830 dead transitions. [2024-11-28 04:35:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 830 transitions, 8276 flow [2024-11-28 04:35:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 04:35:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-28 04:35:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 548 transitions. [2024-11-28 04:35:08,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.23499142367066894 [2024-11-28 04:35:08,105 INFO L175 Difference]: Start difference. First operand has 286 places, 544 transitions, 4181 flow. Second operand 53 states and 548 transitions. [2024-11-28 04:35:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 830 transitions, 8276 flow [2024-11-28 04:35:08,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 830 transitions, 8142 flow, removed 27 selfloop flow, removed 17 redundant places. [2024-11-28 04:35:08,435 INFO L231 Difference]: Finished difference. Result has 336 places, 696 transitions, 7312 flow [2024-11-28 04:35:08,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=7312, PETRI_PLACES=336, PETRI_TRANSITIONS=696} [2024-11-28 04:35:08,436 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-11-28 04:35:08,436 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 696 transitions, 7312 flow [2024-11-28 04:35:08,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:08,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:35:08,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:35:08,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:35:08,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:08,637 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:35:08,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:35:08,637 INFO L85 PathProgramCache]: Analyzing trace with hash 703175251, now seen corresponding path program 5 times [2024-11-28 04:35:08,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:35:08,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350158304] [2024-11-28 04:35:08,637 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:35:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:35:08,683 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:35:08,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:35:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:35:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:35:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350158304] [2024-11-28 04:35:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350158304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:35:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120913889] [2024-11-28 04:35:14,535 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:35:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:35:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:35:14,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:35:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:35:14,622 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:35:14,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:35:14,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:35:14,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:35:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:35:19,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:35:23,454 INFO L349 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2024-11-28 04:35:23,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 226 [2024-11-28 04:35:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:35:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120913889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:35:37,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:35:37,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-11-28 04:35:37,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504437960] [2024-11-28 04:35:37,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:35:37,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 04:35:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:35:37,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 04:35:37,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:35:40,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:35:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 696 transitions, 7312 flow. Second operand has 39 states, 39 states have (on average 11.76923076923077) internal successors, (459), 39 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:35:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:35:40,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:35:40,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:36:18,821 INFO L124 PetriNetUnfolderBase]: 2769/5016 cut-off events. [2024-11-28 04:36:18,821 INFO L125 PetriNetUnfolderBase]: For 192592/192592 co-relation queries the response was YES. [2024-11-28 04:36:18,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36838 conditions, 5016 events. 2769/5016 cut-off events. For 192592/192592 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 33125 event pairs, 110 based on Foata normal form. 23/4985 useless extension candidates. Maximal degree in co-relation 36464. Up to 1589 conditions per place. [2024-11-28 04:36:18,873 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 413 selfloop transitions, 656 changer transitions 19/1091 dead transitions. [2024-11-28 04:36:18,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1091 transitions, 13816 flow [2024-11-28 04:36:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-28 04:36:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-28 04:36:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 915 transitions. [2024-11-28 04:36:18,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-28 04:36:18,876 INFO L175 Difference]: Start difference. First operand has 336 places, 696 transitions, 7312 flow. Second operand 61 states and 915 transitions. [2024-11-28 04:36:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1091 transitions, 13816 flow [2024-11-28 04:36:20,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1091 transitions, 13359 flow, removed 182 selfloop flow, removed 16 redundant places. [2024-11-28 04:36:20,183 INFO L231 Difference]: Finished difference. Result has 395 places, 933 transitions, 12180 flow [2024-11-28 04:36:20,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6922, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=12180, PETRI_PLACES=395, PETRI_TRANSITIONS=933} [2024-11-28 04:36:20,184 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-11-28 04:36:20,184 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 933 transitions, 12180 flow [2024-11-28 04:36:20,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.76923076923077) internal successors, (459), 39 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:36:20,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:36:20,185 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:36:20,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:36:20,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:36:20,385 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:36:20,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:36:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1773634855, now seen corresponding path program 6 times [2024-11-28 04:36:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:36:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311133881] [2024-11-28 04:36:20,386 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:36:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:36:20,411 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:36:20,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:36:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:36:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:36:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311133881] [2024-11-28 04:36:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311133881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:36:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324326023] [2024-11-28 04:36:25,693 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:36:25,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:36:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:36:25,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:36:25,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:36:25,808 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:36:25,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:36:25,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:36:25,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:36:26,664 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 [2024-11-28 04:36:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:36:30,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:36:36,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:36:36,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 291 treesize of output 297 [2024-11-28 04:36:38,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:36:38,255 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 35 treesize of output 31 [2024-11-28 04:36:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:38,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 04:36:38,375 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 04:36:38,375 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 28 treesize of output 1 [2024-11-28 04:36:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:38,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-28 04:36:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:38,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-28 04:36:41,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:36:41,062 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 22 treesize of output 18 [2024-11-28 04:36:41,120 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 04:36:41,120 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 22 treesize of output 1 [2024-11-28 04:36:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:41,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 04:36:41,374 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 04:36:41,374 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 22 treesize of output 1 [2024-11-28 04:36:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:41,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 04:36:41,554 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 04:36:41,554 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 22 treesize of output 1 [2024-11-28 04:36:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:36:41,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-28 04:36:41,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:36:41,714 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 102 treesize of output 86 [2024-11-28 04:36:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:36:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324326023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:36:43,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:36:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-28 04:36:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648597644] [2024-11-28 04:36:43,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:36:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 04:36:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:36:43,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 04:36:43,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:36:46,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:36:46,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 933 transitions, 12180 flow. Second operand has 38 states, 38 states have (on average 11.81578947368421) internal successors, (449), 38 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:36:46,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:36:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:36:46,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:37:00,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:08,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:13,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:17,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:25,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:37:33,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:37,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:37:46,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:38:00,090 INFO L124 PetriNetUnfolderBase]: 3180/5739 cut-off events. [2024-11-28 04:38:00,090 INFO L125 PetriNetUnfolderBase]: For 231032/231032 co-relation queries the response was YES. [2024-11-28 04:38:00,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47207 conditions, 5739 events. 3180/5739 cut-off events. For 231032/231032 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38953 event pairs, 104 based on Foata normal form. 21/5758 useless extension candidates. Maximal degree in co-relation 46800. Up to 1975 conditions per place. [2024-11-28 04:38:00,158 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 448 selfloop transitions, 771 changer transitions 19/1241 dead transitions. [2024-11-28 04:38:00,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1241 transitions, 18628 flow [2024-11-28 04:38:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 04:38:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-28 04:38:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 785 transitions. [2024-11-28 04:38:00,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34309440559440557 [2024-11-28 04:38:00,162 INFO L175 Difference]: Start difference. First operand has 395 places, 933 transitions, 12180 flow. Second operand 52 states and 785 transitions. [2024-11-28 04:38:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1241 transitions, 18628 flow [2024-11-28 04:38:01,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1241 transitions, 18139 flow, removed 153 selfloop flow, removed 25 redundant places. [2024-11-28 04:38:01,820 INFO L231 Difference]: Finished difference. Result has 433 places, 1110 transitions, 17348 flow [2024-11-28 04:38:01,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11785, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=17348, PETRI_PLACES=433, PETRI_TRANSITIONS=1110} [2024-11-28 04:38:01,821 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-11-28 04:38:01,821 INFO L471 AbstractCegarLoop]: Abstraction has has 433 places, 1110 transitions, 17348 flow [2024-11-28 04:38:01,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.81578947368421) internal successors, (449), 38 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:38:01,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:38:01,821 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:38:01,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:38:02,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-28 04:38:02,022 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:38:02,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:38:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash 401432295, now seen corresponding path program 7 times [2024-11-28 04:38:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:38:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475429067] [2024-11-28 04:38:02,023 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:38:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:38:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:38:09,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:38:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475429067] [2024-11-28 04:38:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475429067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:38:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893157437] [2024-11-28 04:38:09,936 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:38:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:38:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:38:09,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:38:09,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:38:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:38:10,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 04:38:10,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:38:10,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:38:10,575 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 [2024-11-28 04:38:11,021 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:38:11,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:38:11,633 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 8 treesize of output 1 [2024-11-28 04:38:12,131 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 8 treesize of output 1 [2024-11-28 04:38:15,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2024-11-28 04:38:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:38:16,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:38:25,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:38:25,863 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2024-11-28 04:38:25,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:38:25,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 91 [2024-11-28 04:38:26,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:38:26,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 127 [2024-11-28 04:38:28,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:38:28,091 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2024-11-28 04:38:28,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:38:28,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2024-11-28 04:38:28,706 INFO L349 Elim1Store]: treesize reduction 5, result has 93.8 percent of original size [2024-11-28 04:38:28,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 112 [2024-11-28 04:38:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:38:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893157437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:38:31,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:38:31,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-11-28 04:38:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296002818] [2024-11-28 04:38:31,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:38:31,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:38:31,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:38:31,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:38:31,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1554, Unknown=5, NotChecked=0, Total=1722 [2024-11-28 04:38:40,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:38:41,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2024-11-28 04:38:41,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1110 transitions, 17348 flow. Second operand has 42 states, 42 states have (on average 6.761904761904762) internal successors, (284), 42 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:38:41,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:38:41,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2024-11-28 04:38:41,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:40:18,840 INFO L124 PetriNetUnfolderBase]: 4758/8579 cut-off events. [2024-11-28 04:40:18,841 INFO L125 PetriNetUnfolderBase]: For 354580/354580 co-relation queries the response was YES. [2024-11-28 04:40:18,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77491 conditions, 8579 events. 4758/8579 cut-off events. For 354580/354580 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 63395 event pairs, 191 based on Foata normal form. 26/8601 useless extension candidates. Maximal degree in co-relation 76868. Up to 2908 conditions per place. [2024-11-28 04:40:18,936 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 944 selfloop transitions, 991 changer transitions 24/1962 dead transitions. [2024-11-28 04:40:18,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1962 transitions, 34869 flow [2024-11-28 04:40:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 04:40:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-11-28 04:40:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 972 transitions. [2024-11-28 04:40:18,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22090909090909092 [2024-11-28 04:40:18,939 INFO L175 Difference]: Start difference. First operand has 433 places, 1110 transitions, 17348 flow. Second operand 100 states and 972 transitions. [2024-11-28 04:40:18,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1962 transitions, 34869 flow [2024-11-28 04:40:22,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1962 transitions, 34426 flow, removed 120 selfloop flow, removed 28 redundant places. [2024-11-28 04:40:22,338 INFO L231 Difference]: Finished difference. Result has 541 places, 1642 transitions, 30858 flow [2024-11-28 04:40:22,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16994, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=30858, PETRI_PLACES=541, PETRI_TRANSITIONS=1642} [2024-11-28 04:40:22,339 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 497 predicate places. [2024-11-28 04:40:22,339 INFO L471 AbstractCegarLoop]: Abstraction has has 541 places, 1642 transitions, 30858 flow [2024-11-28 04:40:22,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.761904761904762) internal successors, (284), 42 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:40:22,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:40:22,340 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:22,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:40:22,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 04:40:22,540 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:40:22,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -94820313, now seen corresponding path program 8 times [2024-11-28 04:40:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:40:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725647796] [2024-11-28 04:40:22,541 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:40:22,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:40:22,563 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:40:22,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:40:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:40:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725647796] [2024-11-28 04:40:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725647796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913662428] [2024-11-28 04:40:25,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:40:25,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:25,620 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:25,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:40:25,716 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:40:25,716 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:40:25,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:40:25,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:25,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:40:26,258 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 [2024-11-28 04:40:26,743 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:40:26,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:40:27,187 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 8 treesize of output 1 [2024-11-28 04:40:27,392 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 8 treesize of output 1 [2024-11-28 04:40:30,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2024-11-28 04:40:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:40:32,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:45,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:40:45,552 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2024-11-28 04:40:45,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:40:45,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 91 [2024-11-28 04:40:45,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:40:45,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 127 [2024-11-28 04:40:47,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:40:47,470 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2024-11-28 04:40:47,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:40:47,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2024-11-28 04:40:48,104 INFO L349 Elim1Store]: treesize reduction 5, result has 93.8 percent of original size [2024-11-28 04:40:48,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 112 [2024-11-28 04:40:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:40:50,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913662428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:50,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:40:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 36 [2024-11-28 04:40:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878310791] [2024-11-28 04:40:50,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:50,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 04:40:50,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:40:50,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 04:40:50,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1170, Unknown=6, NotChecked=0, Total=1332 [2024-11-28 04:40:51,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 44 [2024-11-28 04:40:51,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1642 transitions, 30858 flow. Second operand has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 37 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:40:51,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:40:51,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 44 [2024-11-28 04:40:51,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:41:01,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:42:05,656 INFO L124 PetriNetUnfolderBase]: 5603/10072 cut-off events. [2024-11-28 04:42:05,656 INFO L125 PetriNetUnfolderBase]: For 452613/452613 co-relation queries the response was YES. [2024-11-28 04:42:05,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99335 conditions, 10072 events. 5603/10072 cut-off events. For 452613/452613 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 76672 event pairs, 294 based on Foata normal form. 13/10081 useless extension candidates. Maximal degree in co-relation 98608. Up to 5686 conditions per place. [2024-11-28 04:42:05,894 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 1093 selfloop transitions, 1094 changer transitions 10/2200 dead transitions. [2024-11-28 04:42:05,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 2200 transitions, 44849 flow [2024-11-28 04:42:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 04:42:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-11-28 04:42:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 636 transitions. [2024-11-28 04:42:05,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22237762237762237 [2024-11-28 04:42:05,897 INFO L175 Difference]: Start difference. First operand has 541 places, 1642 transitions, 30858 flow. Second operand 65 states and 636 transitions. [2024-11-28 04:42:05,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 2200 transitions, 44849 flow [2024-11-28 04:42:13,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 2200 transitions, 41948 flow, removed 1424 selfloop flow, removed 7 redundant places. [2024-11-28 04:42:13,352 INFO L231 Difference]: Finished difference. Result has 627 places, 1970 transitions, 39617 flow [2024-11-28 04:42:13,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=28850, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=39617, PETRI_PLACES=627, PETRI_TRANSITIONS=1970} [2024-11-28 04:42:13,355 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 583 predicate places. [2024-11-28 04:42:13,355 INFO L471 AbstractCegarLoop]: Abstraction has has 627 places, 1970 transitions, 39617 flow [2024-11-28 04:42:13,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 37 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:13,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:42:13,356 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:13,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:42:13,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 04:42:13,556 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:42:13,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791797, now seen corresponding path program 9 times [2024-11-28 04:42:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:13,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312533640] [2024-11-28 04:42:13,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:42:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:13,579 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:42:13,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:42:16,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312533640] [2024-11-28 04:42:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312533640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405310019] [2024-11-28 04:42:16,551 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:42:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:16,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:42:16,670 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:42:16,670 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:16,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 04:42:16,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:42:20,747 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:42:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405310019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:42:20,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:42:20,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2024-11-28 04:42:20,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469000364] [2024-11-28 04:42:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:42:20,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:42:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:42:20,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:42:20,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:42:21,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:42:21,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 1970 transitions, 39617 flow. Second operand has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:21,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:42:21,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:42:21,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:42:37,242 INFO L124 PetriNetUnfolderBase]: 6684/11983 cut-off events. [2024-11-28 04:42:37,243 INFO L125 PetriNetUnfolderBase]: For 443779/443779 co-relation queries the response was YES. [2024-11-28 04:42:37,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118887 conditions, 11983 events. 6684/11983 cut-off events. For 443779/443779 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 93795 event pairs, 422 based on Foata normal form. 8/11983 useless extension candidates. Maximal degree in co-relation 118427. Up to 7535 conditions per place. [2024-11-28 04:42:37,687 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1854 selfloop transitions, 524 changer transitions 128/2509 dead transitions. [2024-11-28 04:42:37,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 2509 transitions, 55697 flow [2024-11-28 04:42:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:42:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:42:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 271 transitions. [2024-11-28 04:42:37,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4106060606060606 [2024-11-28 04:42:37,688 INFO L175 Difference]: Start difference. First operand has 627 places, 1970 transitions, 39617 flow. Second operand 15 states and 271 transitions. [2024-11-28 04:42:37,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 2509 transitions, 55697 flow [2024-11-28 04:42:48,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 2509 transitions, 55154 flow, removed 186 selfloop flow, removed 20 redundant places. [2024-11-28 04:42:48,762 INFO L231 Difference]: Finished difference. Result has 631 places, 2197 transitions, 47215 flow [2024-11-28 04:42:48,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=39160, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=47215, PETRI_PLACES=631, PETRI_TRANSITIONS=2197} [2024-11-28 04:42:48,764 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 587 predicate places. [2024-11-28 04:42:48,765 INFO L471 AbstractCegarLoop]: Abstraction has has 631 places, 2197 transitions, 47215 flow [2024-11-28 04:42:48,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:42:48,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:42:48,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:48,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:42:48,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:48,966 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:42:48,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 605541319, now seen corresponding path program 10 times [2024-11-28 04:42:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:42:48,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417067796] [2024-11-28 04:42:48,967 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:42:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:42:49,018 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:42:49,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:42:55,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:42:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417067796] [2024-11-28 04:42:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417067796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234229943] [2024-11-28 04:42:55,472 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:42:55,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:55,475 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:55,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:42:55,596 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:42:55,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:55,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:42:55,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:43:00,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:04,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:43:04,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 270 [2024-11-28 04:43:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:43:32,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234229943] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:43:32,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:43:32,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15, 11] total 33 [2024-11-28 04:43:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068416801] [2024-11-28 04:43:32,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:43:32,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:43:32,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:43:32,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:43:32,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:43:32,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:43:32,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 2197 transitions, 47215 flow. Second operand has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:43:32,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:43:32,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:43:32,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:43:49,437 INFO L124 PetriNetUnfolderBase]: 6605/11789 cut-off events. [2024-11-28 04:43:49,437 INFO L125 PetriNetUnfolderBase]: For 505253/505253 co-relation queries the response was YES. [2024-11-28 04:43:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123138 conditions, 11789 events. 6605/11789 cut-off events. For 505253/505253 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 91560 event pairs, 127 based on Foata normal form. 1/11782 useless extension candidates. Maximal degree in co-relation 122963. Up to 7357 conditions per place. [2024-11-28 04:43:49,952 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 1486 selfloop transitions, 1115 changer transitions 3/2607 dead transitions. [2024-11-28 04:43:49,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 2607 transitions, 61090 flow [2024-11-28 04:43:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:43:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 04:43:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 247 transitions. [2024-11-28 04:43:49,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37424242424242427 [2024-11-28 04:43:49,953 INFO L175 Difference]: Start difference. First operand has 631 places, 2197 transitions, 47215 flow. Second operand 15 states and 247 transitions. [2024-11-28 04:43:49,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 2607 transitions, 61090 flow [2024-11-28 04:44:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 2607 transitions, 60640 flow, removed 182 selfloop flow, removed 7 redundant places. [2024-11-28 04:44:03,086 INFO L231 Difference]: Finished difference. Result has 631 places, 2430 transitions, 55747 flow [2024-11-28 04:44:03,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=46883, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=55747, PETRI_PLACES=631, PETRI_TRANSITIONS=2430} [2024-11-28 04:44:03,089 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 587 predicate places. [2024-11-28 04:44:03,089 INFO L471 AbstractCegarLoop]: Abstraction has has 631 places, 2430 transitions, 55747 flow [2024-11-28 04:44:03,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:44:03,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:44:03,089 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:03,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:44:03,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 04:44:03,290 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:44:03,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash -421703903, now seen corresponding path program 11 times [2024-11-28 04:44:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:44:03,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718053288] [2024-11-28 04:44:03,291 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:44:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:44:03,346 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:44:03,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:44:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:44:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:44:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718053288] [2024-11-28 04:44:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718053288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497010397] [2024-11-28 04:44:11,630 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:44:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:11,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:11,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:44:11,746 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 04:44:11,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:44:11,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:44:11,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:15,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:44:15,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2024-11-28 04:44:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:44:17,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:21,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:44:21,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 268 [2024-11-28 04:44:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:44:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497010397] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17, 12] total 37 [2024-11-28 04:44:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367937795] [2024-11-28 04:44:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:44:27,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:44:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:44:27,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:44:27,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:44:28,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:44:28,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 2430 transitions, 55747 flow. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:44:28,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:44:28,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:44:28,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:44:43,779 INFO L124 PetriNetUnfolderBase]: 7127/12685 cut-off events. [2024-11-28 04:44:43,779 INFO L125 PetriNetUnfolderBase]: For 505589/505589 co-relation queries the response was YES. [2024-11-28 04:44:44,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135787 conditions, 12685 events. 7127/12685 cut-off events. For 505589/505589 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 99502 event pairs, 151 based on Foata normal form. 3/12680 useless extension candidates. Maximal degree in co-relation 135611. Up to 5607 conditions per place. [2024-11-28 04:44:44,114 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1066 selfloop transitions, 1702 changer transitions 6/2777 dead transitions. [2024-11-28 04:44:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 2777 transitions, 68510 flow [2024-11-28 04:44:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:44:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 04:44:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 263 transitions. [2024-11-28 04:44:44,115 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37357954545454547 [2024-11-28 04:44:44,115 INFO L175 Difference]: Start difference. First operand has 631 places, 2430 transitions, 55747 flow. Second operand 16 states and 263 transitions. [2024-11-28 04:44:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 2777 transitions, 68510 flow [2024-11-28 04:44:55,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 2777 transitions, 68107 flow, removed 131 selfloop flow, removed 7 redundant places. [2024-11-28 04:44:55,821 INFO L231 Difference]: Finished difference. Result has 645 places, 2669 transitions, 66781 flow [2024-11-28 04:44:55,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=55414, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=66781, PETRI_PLACES=645, PETRI_TRANSITIONS=2669} [2024-11-28 04:44:55,823 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 601 predicate places. [2024-11-28 04:44:55,823 INFO L471 AbstractCegarLoop]: Abstraction has has 645 places, 2669 transitions, 66781 flow [2024-11-28 04:44:55,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:44:55,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:44:55,823 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:55,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:44:56,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:44:56,024 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-28 04:44:56,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -268199361, now seen corresponding path program 12 times [2024-11-28 04:44:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:44:56,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868324207] [2024-11-28 04:44:56,024 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:44:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:44:56,052 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:44:56,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:45:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:45:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:45:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868324207] [2024-11-28 04:45:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868324207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:45:03,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127794606] [2024-11-28 04:45:03,845 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:45:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:03,847 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e4a26-f561-4042-adf0-a8d73109dabf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:45:04,014 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 04:45:04,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:45:04,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:45:04,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:45:09,275 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:45:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127794606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:45:09,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:45:09,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2024-11-28 04:45:09,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689242096] [2024-11-28 04:45:09,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:45:09,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:45:09,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:45:09,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:45:09,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:45:09,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 04:45:09,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 2669 transitions, 66781 flow. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:45:09,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:45:09,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 04:45:09,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand