./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd --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 ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:31:58,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:31:58,151 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 16:31:58,157 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:31:58,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:31:58,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:31:58,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:31:58,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:31:58,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:31:58,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:31:58,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:31:58,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:31:58,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:31:58,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:31:58,191 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:31:58,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 16:31:58,192 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:31:58,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:31:58,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:31:58,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:31:58,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:31:58,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:31:58,195 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_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd 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 -> ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 [2024-11-13 16:31:58,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:31:58,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:31:58,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:31:58,636 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:31:58,637 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:31:58,638 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c Unable to find full path for "g++" [2024-11-13 16:32:00,826 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:32:01,240 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:32:01,241 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-13 16:32:01,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/data/7ef1c6de6/0db0f4c8ee4a44bab3b2caeee1369b70/FLAGc4b525a17 [2024-11-13 16:32:01,272 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/data/7ef1c6de6/0db0f4c8ee4a44bab3b2caeee1369b70 [2024-11-13 16:32:01,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:32:01,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:32:01,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:32:01,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:32:01,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:32:01,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5313d1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01, skipping insertion in model container [2024-11-13 16:32:01,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,320 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:32:01,566 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 16:32:01,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:32:01,580 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:32:01,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:32:01,640 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:32:01,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01 WrapperNode [2024-11-13 16:32:01,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:32:01,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:32:01,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:32:01,643 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:32:01,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,706 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 455 [2024-11-13 16:32:01,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:32:01,711 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:32:01,711 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:32:01,711 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:32:01,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,743 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,777 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]. [2024-11-13 16:32:01,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,777 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,807 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:32:01,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:32:01,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:32:01,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:32:01,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (1/1) ... [2024-11-13 16:32:01,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:32:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:32:01,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:32:01,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19bc0590-6b36-4261-895e-595e06f81e0d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:32:01,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:32:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 16:32:01,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 16:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 16:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 16:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 16:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 16:32:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-13 16:32:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 16:32:01,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:32:01,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:32:01,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:32:01,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:32:01,932 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 16:32:02,149 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:32:02,152 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:32:03,288 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 16:32:03,289 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:32:04,164 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:32:04,165 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-13 16:32:04,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:32:04 BoogieIcfgContainer [2024-11-13 16:32:04,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:32:04,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:32:04,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:32:04,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:32:04,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:32:01" (1/3) ... [2024-11-13 16:32:04,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed8e2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:32:04, skipping insertion in model container [2024-11-13 16:32:04,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:32:01" (2/3) ... [2024-11-13 16:32:04,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed8e2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:32:04, skipping insertion in model container [2024-11-13 16:32:04,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:32:04" (3/3) ... [2024-11-13 16:32:04,181 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2024-11-13 16:32:04,202 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:32:04,204 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-2.wvr.c that has 5 procedures, 91 locations, 1 initial locations, 8 loop locations, and 34 error locations. [2024-11-13 16:32:04,205 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 16:32:04,376 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 16:32:04,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 232 flow [2024-11-13 16:32:04,517 INFO L124 PetriNetUnfolderBase]: 12/98 cut-off events. [2024-11-13 16:32:04,521 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 16:32:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 98 events. 12/98 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 304 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2024-11-13 16:32:04,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 102 transitions, 232 flow [2024-11-13 16:32:04,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 97 transitions, 218 flow [2024-11-13 16:32:04,555 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:32:04,581 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;@7ca704ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:32:04,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-13 16:32:04,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:32:04,592 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 16:32:04,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 16:32:04,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:32:04,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:32:04,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-13 16:32:04,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:32:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1399518, now seen corresponding path program 1 times [2024-11-13 16:32:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:32:04,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487490182] [2024-11-13 16:32:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:32:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:32:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:32:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:32:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:32:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487490182] [2024-11-13 16:32:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487490182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:32:05,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:32:05,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 16:32:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191647950] [2024-11-13 16:32:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:32:05,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:32:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:32:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:32:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:32:05,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 102 [2024-11-13 16:32:05,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-13 16:32:05,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:32:05,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 102 [2024-11-13 16:32:05,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:32:33,599 INFO L124 PetriNetUnfolderBase]: 235780/304603 cut-off events. [2024-11-13 16:32:33,600 INFO L125 PetriNetUnfolderBase]: For 7019/7019 co-relation queries the response was YES. [2024-11-13 16:32:34,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616692 conditions, 304603 events. 235780/304603 cut-off events. For 7019/7019 co-relation queries the response was YES. Maximal size of possible extension queue 9315. Compared 1919917 event pairs, 214706 based on Foata normal form. 1/175792 useless extension candidates. Maximal degree in co-relation 603765. Up to 304488 conditions per place. [2024-11-13 16:32:35,305 INFO L140 encePairwiseOnDemand]: 91/102 looper letters, 76 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-13 16:32:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 87 transitions, 354 flow [2024-11-13 16:32:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:32:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:32:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-13 16:32:35,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-11-13 16:32:35,322 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 218 flow. Second operand 3 states and 129 transitions. [2024-11-13 16:32:35,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 87 transitions, 354 flow [2024-11-13 16:32:35,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 338 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 16:32:35,762 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 186 flow [2024-11-13 16:32:35,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-13 16:32:35,773 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -12 predicate places. [2024-11-13 16:32:35,774 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 186 flow [2024-11-13 16:32:35,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-11-13 16:32:35,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:32:35,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:32:35,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:32:35,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-13 16:32:35,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:32:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1399519, now seen corresponding path program 1 times [2024-11-13 16:32:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:32:35,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556588903] [2024-11-13 16:32:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:32:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:32:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:32:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:32:36,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:32:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556588903] [2024-11-13 16:32:36,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556588903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:32:36,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:32:36,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:32:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722110291] [2024-11-13 16:32:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:32:36,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:32:36,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:32:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:32:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:32:36,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 102 [2024-11-13 16:32:36,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:32:36,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:32:36,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 102 [2024-11-13 16:32:36,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand