./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU --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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:05:24,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:05:24,495 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:05:24,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:05:24,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:05:24,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:05:24,542 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:05:24,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:05:24,543 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:05:24,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:05:24,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:05:24,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:05:24,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:05:24,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:05:24,552 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:05:24,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:05:24,553 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:05:24,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:05:24,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:05:24,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:05:24,555 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:05:24,555 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:05:24,556 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:05:24,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:05:24,556 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:05:24,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:05:24,557 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:05:24,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:05:24,557 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:05:24,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:05:24,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:05:24,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:05:24,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:05:24,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:24,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:05:24,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:05:24,560 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:05:24,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:05:24,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:05:24,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:05:24,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:05:24,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:05:24,562 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2024-10-31 22:05:24,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:05:24,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:05:24,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:05:24,883 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:05:24,883 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:05:24,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c Unable to find full path for "g++" [2024-10-31 22:05:27,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:05:27,382 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:05:27,382 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2024-10-31 22:05:27,391 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/data/bbe9e4783/b02f12b3fe034644bcb0948a853f0c68/FLAGb6e61701b [2024-10-31 22:05:27,406 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/data/bbe9e4783/b02f12b3fe034644bcb0948a853f0c68 [2024-10-31 22:05:27,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:05:27,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:05:27,412 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:27,413 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:05:27,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:05:27,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310ccb82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27, skipping insertion in model container [2024-10-31 22:05:27,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:05:27,685 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:05:27,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:27,700 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:05:27,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:27,769 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:05:27,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27 WrapperNode [2024-10-31 22:05:27,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:27,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:27,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:05:27,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:05:27,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,787 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,826 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 241 [2024-10-31 22:05:27,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:27,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:05:27,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:05:27,828 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:05:27,841 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,845 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,868 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:05:27,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:05:27,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:05:27,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:05:27,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:05:27,893 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (1/1) ... [2024-10-31 22:05:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:27,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:27,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:05:27,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:05:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:05:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:05:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:05:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:05:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:05:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:05:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:05:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:05:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:05:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:05:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:05:27,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:05:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:05:27,995 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:05:28,191 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:05:28,194 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:05:28,961 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:05:28,962 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:05:29,467 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:05:29,468 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-31 22:05:29,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:29 BoogieIcfgContainer [2024-10-31 22:05:29,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:05:29,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:05:29,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:05:29,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:05:29,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:05:27" (1/3) ... [2024-10-31 22:05:29,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd15dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:29, skipping insertion in model container [2024-10-31 22:05:29,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:27" (2/3) ... [2024-10-31 22:05:29,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd15dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:29, skipping insertion in model container [2024-10-31 22:05:29,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:29" (3/3) ... [2024-10-31 22:05:29,485 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2024-10-31 22:05:29,506 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:05:29,507 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-31 22:05:29,507 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:05:29,574 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:05:29,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 145 flow [2024-10-31 22:05:29,663 INFO L124 PetriNetUnfolderBase]: 7/59 cut-off events. [2024-10-31 22:05:29,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:05:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 7/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-10-31 22:05:29,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 62 transitions, 145 flow [2024-10-31 22:05:29,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 58 transitions, 134 flow [2024-10-31 22:05:29,690 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:05:29,697 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;@52188b69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:05:29,698 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-10-31 22:05:29,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:05:29,701 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:05:29,702 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:05:29,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:29,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:05:29,706 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:29,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash 744745, now seen corresponding path program 1 times [2024-10-31 22:05:29,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:29,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924311828] [2024-10-31 22:05:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:29,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:30,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:30,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924311828] [2024-10-31 22:05:30,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924311828] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:30,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:30,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:05:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48677595] [2024-10-31 22:05:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:30,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:30,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:30,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-10-31 22:05:30,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:30,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:30,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-10-31 22:05:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:31,149 INFO L124 PetriNetUnfolderBase]: 3101/5050 cut-off events. [2024-10-31 22:05:31,149 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2024-10-31 22:05:31,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 5050 events. 3101/5050 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33153 event pairs, 2731 based on Foata normal form. 337/3583 useless extension candidates. Maximal degree in co-relation 9119. Up to 4203 conditions per place. [2024-10-31 22:05:31,205 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 38 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-31 22:05:31,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 202 flow [2024-10-31 22:05:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-10-31 22:05:31,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:05:31,222 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 134 flow. Second operand 3 states and 93 transitions. [2024-10-31 22:05:31,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 202 flow [2024-10-31 22:05:31,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:05:31,236 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 114 flow [2024-10-31 22:05:31,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-10-31 22:05:31,245 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-10-31 22:05:31,246 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 114 flow [2024-10-31 22:05:31,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:31,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:31,246 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:05:31,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:05:31,247 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:31,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 744746, now seen corresponding path program 1 times [2024-10-31 22:05:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827314665] [2024-10-31 22:05:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:31,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:31,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:31,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827314665] [2024-10-31 22:05:31,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827314665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:31,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:31,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:31,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410404691] [2024-10-31 22:05:31,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:31,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:31,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-10-31 22:05:31,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-10-31 22:05:31,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:31,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-10-31 22:05:31,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:32,510 INFO L124 PetriNetUnfolderBase]: 3101/5048 cut-off events. [2024-10-31 22:05:32,510 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-31 22:05:32,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9362 conditions, 5048 events. 3101/5048 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33184 event pairs, 2731 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 9343. Up to 4203 conditions per place. [2024-10-31 22:05:32,553 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 34 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-10-31 22:05:32,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 190 flow [2024-10-31 22:05:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-10-31 22:05:32,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-10-31 22:05:32,556 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 114 flow. Second operand 4 states and 106 transitions. [2024-10-31 22:05:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 190 flow [2024-10-31 22:05:32,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:32,558 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 118 flow [2024-10-31 22:05:32,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-31 22:05:32,560 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2024-10-31 22:05:32,560 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 118 flow [2024-10-31 22:05:32,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-10-31 22:05:32,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:32,561 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:32,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:05:32,561 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:32,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 631782869, now seen corresponding path program 1 times [2024-10-31 22:05:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:32,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905663095] [2024-10-31 22:05:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905663095] [2024-10-31 22:05:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905663095] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:32,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:32,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578814608] [2024-10-31 22:05:32,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:32,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:32,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-31 22:05:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-31 22:05:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:33,475 INFO L124 PetriNetUnfolderBase]: 3241/5326 cut-off events. [2024-10-31 22:05:33,475 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-31 22:05:33,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9882 conditions, 5326 events. 3241/5326 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34746 event pairs, 2858 based on Foata normal form. 98/3599 useless extension candidates. Maximal degree in co-relation 9343. Up to 4209 conditions per place. [2024-10-31 22:05:33,518 INFO L140 encePairwiseOnDemand]: 50/62 looper letters, 56 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2024-10-31 22:05:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 291 flow [2024-10-31 22:05:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-10-31 22:05:33,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2024-10-31 22:05:33,521 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 118 flow. Second operand 4 states and 141 transitions. [2024-10-31 22:05:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 291 flow [2024-10-31 22:05:33,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 269 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:05:33,526 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 142 flow [2024-10-31 22:05:33,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-10-31 22:05:33,527 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2024-10-31 22:05:33,528 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 142 flow [2024-10-31 22:05:33,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:33,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:33,528 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:33,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:05:33,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:33,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:33,530 INFO L85 PathProgramCache]: Analyzing trace with hash -749223984, now seen corresponding path program 1 times [2024-10-31 22:05:33,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028705633] [2024-10-31 22:05:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028705633] [2024-10-31 22:05:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028705633] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:33,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:33,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358311817] [2024-10-31 22:05:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:33,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:33,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-10-31 22:05:33,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:33,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:33,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-10-31 22:05:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:34,680 INFO L124 PetriNetUnfolderBase]: 2350/3865 cut-off events. [2024-10-31 22:05:34,681 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-10-31 22:05:34,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 3865 events. 2350/3865 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23709 event pairs, 2053 based on Foata normal form. 0/2723 useless extension candidates. Maximal degree in co-relation 7367. Up to 3233 conditions per place. [2024-10-31 22:05:34,706 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 36 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-10-31 22:05:34,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 208 flow [2024-10-31 22:05:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-10-31 22:05:34,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-10-31 22:05:34,709 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 142 flow. Second operand 4 states and 104 transitions. [2024-10-31 22:05:34,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 208 flow [2024-10-31 22:05:34,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:05:34,711 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 134 flow [2024-10-31 22:05:34,713 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-10-31 22:05:34,714 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-10-31 22:05:34,714 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 134 flow [2024-10-31 22:05:34,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:34,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:34,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:34,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:05:34,715 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:34,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash -749223985, now seen corresponding path program 1 times [2024-10-31 22:05:34,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139104823] [2024-10-31 22:05:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:34,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:34,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139104823] [2024-10-31 22:05:34,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139104823] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:34,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:34,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:34,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910342841] [2024-10-31 22:05:34,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:34,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:34,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:34,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-10-31 22:05:34,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:34,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:34,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-10-31 22:05:34,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:35,224 INFO L124 PetriNetUnfolderBase]: 1605/2666 cut-off events. [2024-10-31 22:05:35,224 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2024-10-31 22:05:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2666 events. 1605/2666 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15095 event pairs, 1376 based on Foata normal form. 0/2088 useless extension candidates. Maximal degree in co-relation 4725. Up to 2218 conditions per place. [2024-10-31 22:05:35,244 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 32 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-10-31 22:05:35,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 194 flow [2024-10-31 22:05:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:05:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-10-31 22:05:35,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-10-31 22:05:35,246 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 134 flow. Second operand 5 states and 117 transitions. [2024-10-31 22:05:35,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 194 flow [2024-10-31 22:05:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:35,248 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 126 flow [2024-10-31 22:05:35,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-10-31 22:05:35,249 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2024-10-31 22:05:35,250 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 126 flow [2024-10-31 22:05:35,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:35,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:35,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:35,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:05:35,251 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:35,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1086663848, now seen corresponding path program 1 times [2024-10-31 22:05:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796035495] [2024-10-31 22:05:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:35,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:35,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796035495] [2024-10-31 22:05:35,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796035495] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:35,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:05:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738177064] [2024-10-31 22:05:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:35,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:35,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-31 22:05:35,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:35,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:35,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-31 22:05:35,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:35,691 INFO L124 PetriNetUnfolderBase]: 1497/2498 cut-off events. [2024-10-31 22:05:35,692 INFO L125 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2024-10-31 22:05:35,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5095 conditions, 2498 events. 1497/2498 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13512 event pairs, 577 based on Foata normal form. 71/1994 useless extension candidates. Maximal degree in co-relation 4851. Up to 1517 conditions per place. [2024-10-31 22:05:35,708 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 48 selfloop transitions, 2 changer transitions 1/61 dead transitions. [2024-10-31 22:05:35,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 266 flow [2024-10-31 22:05:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-31 22:05:35,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-10-31 22:05:35,711 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 126 flow. Second operand 3 states and 106 transitions. [2024-10-31 22:05:35,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 266 flow [2024-10-31 22:05:35,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 259 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:05:35,714 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 128 flow [2024-10-31 22:05:35,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-10-31 22:05:35,715 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2024-10-31 22:05:35,715 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 128 flow [2024-10-31 22:05:35,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:35,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:35,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:35,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:05:35,716 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:35,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash -671653960, now seen corresponding path program 1 times [2024-10-31 22:05:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292006114] [2024-10-31 22:05:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:35,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:35,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:35,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292006114] [2024-10-31 22:05:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292006114] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:35,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:35,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577113751] [2024-10-31 22:05:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:35,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:05:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:05:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:05:35,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-31 22:05:35,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:35,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:35,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-31 22:05:35,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:36,094 INFO L124 PetriNetUnfolderBase]: 1317/2188 cut-off events. [2024-10-31 22:05:36,095 INFO L125 PetriNetUnfolderBase]: For 409/414 co-relation queries the response was YES. [2024-10-31 22:05:36,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 2188 events. 1317/2188 cut-off events. For 409/414 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10987 event pairs, 527 based on Foata normal form. 15/1831 useless extension candidates. Maximal degree in co-relation 4759. Up to 1772 conditions per place. [2024-10-31 22:05:36,109 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 43 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-10-31 22:05:36,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 246 flow [2024-10-31 22:05:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:05:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:05:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-31 22:05:36,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-10-31 22:05:36,110 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 128 flow. Second operand 3 states and 99 transitions. [2024-10-31 22:05:36,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 246 flow [2024-10-31 22:05:36,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:05:36,113 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 149 flow [2024-10-31 22:05:36,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-10-31 22:05:36,114 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-10-31 22:05:36,114 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 149 flow [2024-10-31 22:05:36,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:36,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:36,115 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:36,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:05:36,120 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:36,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 748385132, now seen corresponding path program 1 times [2024-10-31 22:05:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079466002] [2024-10-31 22:05:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:36,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079466002] [2024-10-31 22:05:36,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079466002] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:36,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:36,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392801932] [2024-10-31 22:05:36,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:36,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:36,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-10-31 22:05:36,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:36,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:36,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-10-31 22:05:36,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:36,491 INFO L124 PetriNetUnfolderBase]: 963/1687 cut-off events. [2024-10-31 22:05:36,491 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2024-10-31 22:05:36,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 1687 events. 963/1687 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8518 event pairs, 704 based on Foata normal form. 0/1515 useless extension candidates. Maximal degree in co-relation 3865. Up to 1365 conditions per place. [2024-10-31 22:05:36,503 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-10-31 22:05:36,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 215 flow [2024-10-31 22:05:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-31 22:05:36,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-10-31 22:05:36,505 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 149 flow. Second operand 4 states and 98 transitions. [2024-10-31 22:05:36,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 215 flow [2024-10-31 22:05:36,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 202 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:36,511 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 134 flow [2024-10-31 22:05:36,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-10-31 22:05:36,512 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2024-10-31 22:05:36,512 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 134 flow [2024-10-31 22:05:36,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:36,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:36,513 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:36,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:05:36,514 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:36,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1999803309, now seen corresponding path program 1 times [2024-10-31 22:05:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:36,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128152463] [2024-10-31 22:05:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128152463] [2024-10-31 22:05:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128152463] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720741301] [2024-10-31 22:05:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:36,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:36,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-31 22:05:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-31 22:05:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:36,998 INFO L124 PetriNetUnfolderBase]: 1205/2141 cut-off events. [2024-10-31 22:05:36,998 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2024-10-31 22:05:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 2141 events. 1205/2141 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11200 event pairs, 906 based on Foata normal form. 64/2034 useless extension candidates. Maximal degree in co-relation 4544. Up to 1369 conditions per place. [2024-10-31 22:05:37,011 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 35 selfloop transitions, 4 changer transitions 19/68 dead transitions. [2024-10-31 22:05:37,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 311 flow [2024-10-31 22:05:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:05:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-10-31 22:05:37,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-10-31 22:05:37,013 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 134 flow. Second operand 5 states and 145 transitions. [2024-10-31 22:05:37,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 311 flow [2024-10-31 22:05:37,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:05:37,016 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 153 flow [2024-10-31 22:05:37,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-10-31 22:05:37,017 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-10-31 22:05:37,017 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 153 flow [2024-10-31 22:05:37,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:37,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:37,018 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:37,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:05:37,018 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:37,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1366877506, now seen corresponding path program 1 times [2024-10-31 22:05:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:37,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326965794] [2024-10-31 22:05:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326965794] [2024-10-31 22:05:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326965794] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926598011] [2024-10-31 22:05:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:37,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:05:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:37,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:05:37,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:37,680 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:05:37,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926598011] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:37,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:05:37,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-10-31 22:05:37,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644909230] [2024-10-31 22:05:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:37,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:05:37,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-31 22:05:37,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:37,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:05:37,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-31 22:05:37,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:05:37,978 INFO L124 PetriNetUnfolderBase]: 663/1236 cut-off events. [2024-10-31 22:05:37,980 INFO L125 PetriNetUnfolderBase]: For 389/389 co-relation queries the response was YES. [2024-10-31 22:05:37,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 1236 events. 663/1236 cut-off events. For 389/389 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6218 event pairs, 474 based on Foata normal form. 86/1227 useless extension candidates. Maximal degree in co-relation 2596. Up to 945 conditions per place. [2024-10-31 22:05:37,988 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 33 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-10-31 22:05:37,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 215 flow [2024-10-31 22:05:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:05:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-10-31 22:05:37,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-10-31 22:05:37,990 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 153 flow. Second operand 4 states and 104 transitions. [2024-10-31 22:05:37,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 215 flow [2024-10-31 22:05:37,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 207 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-31 22:05:37,994 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 141 flow [2024-10-31 22:05:37,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-10-31 22:05:37,995 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -7 predicate places. [2024-10-31 22:05:37,996 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 141 flow [2024-10-31 22:05:37,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:37,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:05:37,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:38,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:05:38,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:38,201 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-10-31 22:05:38,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1392492121, now seen corresponding path program 1 times [2024-10-31 22:05:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:38,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865795879] [2024-10-31 22:05:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:38,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:40,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:40,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865795879] [2024-10-31 22:05:40,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865795879] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603637422] [2024-10-31 22:05:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:40,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:40,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ab92f0-e255-4567-a5e2-fb0ecfbaca5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:05:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:40,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-31 22:05:40,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:40,751 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 [2024-10-31 22:05:40,886 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 [2024-10-31 22:05:40,998 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:05:40,999 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 [2024-10-31 22:05:41,128 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 [2024-10-31 22:05:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:42,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:48,172 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-10-31 22:05:48,173 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 279 treesize of output 297 [2024-10-31 22:05:48,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:48,226 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 195 treesize of output 191 [2024-10-31 22:05:48,336 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 36 treesize of output 30 [2024-10-31 22:05:48,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:48,523 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 159 treesize of output 201 [2024-10-31 22:05:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:49,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603637422] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:49,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:05:49,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2024-10-31 22:05:49,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250842223] [2024-10-31 22:05:49,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:49,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-31 22:05:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-31 22:05:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1071, Unknown=1, NotChecked=0, Total=1190 [2024-10-31 22:05:53,723 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]