./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC --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 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:15:26,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:15:26,746 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:15:26,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:15:26,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:15:26,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:15:26,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:15:26,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:15:26,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:15:26,778 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:15:26,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:15:26,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:15:26,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:15:26,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:15:26,779 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:15:26,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:15:26,780 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:15:26,781 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:15:26,782 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:15:26,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:15:26,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:15:26,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:15:26,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:15:26,784 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC 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 -> 5bf746ef76f8c8352051d8eb5f02d7a475e14d238622e290fcb51135a3348206 [2024-11-23 23:15:27,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:15:27,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:15:27,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:15:27,067 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:15:27,068 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:15:27,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-23 23:15:29,967 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/data/e81967719/3b20b30dc6be4d389ffab80678f1c363/FLAG396bb04a6 [2024-11-23 23:15:30,259 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:15:30,260 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/sv-benchmarks/c/weaver/popl20-bad-commit-2.wvr-bad.c [2024-11-23 23:15:30,275 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/data/e81967719/3b20b30dc6be4d389ffab80678f1c363/FLAG396bb04a6 [2024-11-23 23:15:30,288 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/data/e81967719/3b20b30dc6be4d389ffab80678f1c363 [2024-11-23 23:15:30,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:15:30,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:15:30,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:15:30,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:15:30,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:15:30,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da81b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30, skipping insertion in model container [2024-11-23 23:15:30,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,325 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:15:30,536 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:15:30,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:15:30,551 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:15:30,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:15:30,608 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:15:30,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30 WrapperNode [2024-11-23 23:15:30,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:15:30,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:15:30,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:15:30,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:15:30,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,632 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,687 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 455 [2024-11-23 23:15:30,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:15:30,688 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:15:30,688 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:15:30,688 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:15:30,698 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,704 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,742 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-23 23:15:30,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,755 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:15:30,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:15:30,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:15:30,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:15:30,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (1/1) ... [2024-11-23 23:15:30,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:15:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:15:30,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:15:30,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:15:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:15:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:15:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:15:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-23 23:15:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:15:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:15:30,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:15:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:15:30,854 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:15:30,980 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:15:30,982 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:15:31,962 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:15:31,962 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:15:32,659 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:15:32,659 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 23:15:32,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:32 BoogieIcfgContainer [2024-11-23 23:15:32,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:15:32,662 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:15:32,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:15:32,668 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:15:32,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:30" (1/3) ... [2024-11-23 23:15:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592f673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:32, skipping insertion in model container [2024-11-23 23:15:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:30" (2/3) ... [2024-11-23 23:15:32,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592f673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:32, skipping insertion in model container [2024-11-23 23:15:32,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:32" (3/3) ... [2024-11-23 23:15:32,671 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-2.wvr-bad.c [2024-11-23 23:15:32,690 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:15:32,693 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-2.wvr-bad.c that has 5 procedures, 99 locations, 1 initial locations, 8 loop locations, and 34 error locations. [2024-11-23 23:15:32,693 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:15:32,816 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-23 23:15:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 272 flow [2024-11-23 23:15:32,933 INFO L124 PetriNetUnfolderBase]: 24/118 cut-off events. [2024-11-23 23:15:32,936 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 23:15:32,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 118 events. 24/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 398 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 98. Up to 8 conditions per place. [2024-11-23 23:15:32,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 272 flow [2024-11-23 23:15:32,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 117 transitions, 258 flow [2024-11-23 23:15:32,965 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:15:32,978 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;@c20ee67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:15:32,978 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-23 23:15:32,983 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:15:32,983 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:15:32,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:15:32,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:15:32,984 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:15:32,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-23 23:15:32,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:15:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1382589, now seen corresponding path program 1 times [2024-11-23 23:15:32,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:15:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542314648] [2024-11-23 23:15:32,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:15:33,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:15:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:15:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:15:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:15:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542314648] [2024-11-23 23:15:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542314648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:15:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:15:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:15:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212813160] [2024-11-23 23:15:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:15:33,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:15:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:15:33,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:15:33,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:15:33,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-11-23 23:15:33,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:15:33,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:15:33,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-11-23 23:15:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:15:46,924 INFO L124 PetriNetUnfolderBase]: 118658/157187 cut-off events. [2024-11-23 23:15:46,925 INFO L125 PetriNetUnfolderBase]: For 3382/3382 co-relation queries the response was YES. [2024-11-23 23:15:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305211 conditions, 157187 events. 118658/157187 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 1180972 event pairs, 87208 based on Foata normal form. 1/82086 useless extension candidates. Maximal degree in co-relation 297468. Up to 144091 conditions per place. [2024-11-23 23:15:48,149 INFO L140 encePairwiseOnDemand]: 111/122 looper letters, 76 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2024-11-23 23:15:48,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 394 flow [2024-11-23 23:15:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:15:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:15:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-11-23 23:15:48,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2024-11-23 23:15:48,169 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 258 flow. Second operand 3 states and 189 transitions. [2024-11-23 23:15:48,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 394 flow [2024-11-23 23:15:48,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 378 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-23 23:15:48,712 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 226 flow [2024-11-23 23:15:48,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-11-23 23:15:48,719 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2024-11-23 23:15:48,719 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 226 flow [2024-11-23 23:15:48,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:15:48,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:15:48,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:15:48,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:15:48,720 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-23 23:15:48,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:15:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1382590, now seen corresponding path program 1 times [2024-11-23 23:15:48,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:15:48,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770943195] [2024-11-23 23:15:48,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:15:48,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:15:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:15:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:15:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:15:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770943195] [2024-11-23 23:15:49,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770943195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:15:49,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:15:49,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:15:49,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92894610] [2024-11-23 23:15:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:15:49,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:15:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:15:49,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:15:49,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:15:49,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-11-23 23:15:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:15:49,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:15:49,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-11-23 23:15:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:15:59,799 INFO L124 PetriNetUnfolderBase]: 118662/157199 cut-off events. [2024-11-23 23:15:59,799 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2024-11-23 23:15:59,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302871 conditions, 157199 events. 118662/157199 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 12294. Compared 1180139 event pairs, 87208 based on Foata normal form. 0/82091 useless extension candidates. Maximal degree in co-relation 302807. Up to 144108 conditions per place. [2024-11-23 23:16:00,492 INFO L140 encePairwiseOnDemand]: 105/122 looper letters, 81 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2024-11-23 23:16:00,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 440 flow [2024-11-23 23:16:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:16:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:16:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2024-11-23 23:16:00,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47950819672131145 [2024-11-23 23:16:00,494 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 226 flow. Second operand 4 states and 234 transitions. [2024-11-23 23:16:00,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 440 flow [2024-11-23 23:16:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:16:00,500 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 330 flow [2024-11-23 23:16:00,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-11-23 23:16:00,501 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, -8 predicate places. [2024-11-23 23:16:00,501 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 330 flow [2024-11-23 23:16:00,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:16:00,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:16:00,502 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:16:00,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:16:00,502 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-23 23:16:00,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:16:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1328713868, now seen corresponding path program 1 times [2024-11-23 23:16:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:16:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667710937] [2024-11-23 23:16:00,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:16:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:16:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:16:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:16:00,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:16:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667710937] [2024-11-23 23:16:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667710937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:16:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536963452] [2024-11-23 23:16:00,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:16:00,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:16:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:16:00,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:16:00,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bf560a6-e05c-46de-914c-350654b654c9/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:16:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:16:01,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:16:01,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:16:01,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:16:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:16:01,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:16:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:16:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536963452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:16:01,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:16:01,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:16:01,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84576393] [2024-11-23 23:16:01,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:16:01,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:16:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:16:01,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:16:01,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:16:01,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 122 [2024-11-23 23:16:01,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 330 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:16:01,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:16:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 122 [2024-11-23 23:16:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand