./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx --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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:05:11,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:05:11,427 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 21:05:11,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:05:11,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:05:11,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:05:11,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:05:11,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:05:11,461 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:05:11,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:05:11,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:05:11,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:05:11,464 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:05:11,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:05:11,465 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:05:11,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:05:11,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:05:11,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:05:11,467 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:05:11,468 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:05:11,468 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:05:11,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:05:11,469 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:05:11,470 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:05:11,470 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:05:11,471 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:05:11,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:05:11,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:05:11,472 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:05:11,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:05:11,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:05:11,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:05:11,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:05:11,474 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:05:11,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:05:11,475 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:05:11,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:05:11,475 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:05:11,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:05:11,476 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_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2023-11-21 21:05:11,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:05:11,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:05:11,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:05:11,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:05:11,836 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:05:11,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-21 21:05:14,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:05:15,286 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:05:15,286 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-21 21:05:15,305 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data/ffef8ad5e/4bbcca069140498388db3151b9ddb2ff/FLAGbd57990fa [2023-11-21 21:05:15,326 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data/ffef8ad5e/4bbcca069140498388db3151b9ddb2ff [2023-11-21 21:05:15,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:05:15,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:05:15,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:15,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:05:15,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:05:15,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179a02c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15, skipping insertion in model container [2023-11-21 21:05:15,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,399 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:05:15,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:15,783 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:05:15,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:15,894 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:05:15,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15 WrapperNode [2023-11-21 21:05:15,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:15,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:15,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:05:15,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:05:15,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,944 INFO L138 Inliner]: procedures = 167, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-21 21:05:15,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:15,945 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:05:15,945 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:05:15,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:05:15,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,973 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:05:15,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:05:15,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:05:15,979 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:05:15,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (1/1) ... [2023-11-21 21:05:15,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:05:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:05:16,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:05:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:05:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 21:05:16,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 21:05:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 21:05:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:05:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:05:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:05:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 21:05:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:05:16,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:05:16,054 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:05:16,173 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:05:16,175 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:05:16,367 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:05:16,469 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:05:16,469 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 21:05:16,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:16 BoogieIcfgContainer [2023-11-21 21:05:16,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:05:16,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:05:16,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:05:16,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:05:16,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:15" (1/3) ... [2023-11-21 21:05:16,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392babdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:16, skipping insertion in model container [2023-11-21 21:05:16,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:15" (2/3) ... [2023-11-21 21:05:16,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392babdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:16, skipping insertion in model container [2023-11-21 21:05:16,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:16" (3/3) ... [2023-11-21 21:05:16,489 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-11-21 21:05:16,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:05:16,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-21 21:05:16,512 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:05:16,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:05:16,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:16,729 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-21 21:05:16,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:16,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-21 21:05:16,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:16,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:16,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:05:16,775 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6a40048a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:05:16,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 21:05:16,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:05:16,789 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 21:05:16,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:16,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:16,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 221963, now seen corresponding path program 1 times [2023-11-21 21:05:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971488058] [2023-11-21 21:05:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:17,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971488058] [2023-11-21 21:05:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971488058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:17,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:17,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614926499] [2023-11-21 21:05:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:17,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:17,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:17,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2023-11-21 21:05:17,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:17,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:17,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2023-11-21 21:05:17,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:17,265 INFO L124 PetriNetUnfolderBase]: 31/87 cut-off events. [2023-11-21 21:05:17,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:17,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 87 events. 31/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 279 event pairs, 15 based on Foata normal form. 8/83 useless extension candidates. Maximal degree in co-relation 130. Up to 54 conditions per place. [2023-11-21 21:05:17,271 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 12 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-21 21:05:17,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 74 flow [2023-11-21 21:05:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-21 21:05:17,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2023-11-21 21:05:17,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-21 21:05:17,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-21 21:05:17,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:17,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-21 21:05:17,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:17,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:17,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:17,300 INFO L175 Difference]: Start difference. First operand has 26 places, 29 transitions, 62 flow. Second operand 3 states and 47 transitions. [2023-11-21 21:05:17,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 74 flow [2023-11-21 21:05:17,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:05:17,305 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 50 flow [2023-11-21 21:05:17,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-11-21 21:05:17,319 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-21 21:05:17,320 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 50 flow [2023-11-21 21:05:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:17,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:17,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:17,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:05:17,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:17,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash 221964, now seen corresponding path program 1 times [2023-11-21 21:05:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:17,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498599205] [2023-11-21 21:05:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498599205] [2023-11-21 21:05:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498599205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:17,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:17,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318128974] [2023-11-21 21:05:17,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:17,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:17,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-21 21:05:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-11-21 21:05:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:17,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-21 21:05:17,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:17,475 INFO L124 PetriNetUnfolderBase]: 22/65 cut-off events. [2023-11-21 21:05:17,476 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 21:05:17,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 65 events. 22/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 10 based on Foata normal form. 7/63 useless extension candidates. Maximal degree in co-relation 104. Up to 39 conditions per place. [2023-11-21 21:05:17,477 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-21 21:05:17,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 72 flow [2023-11-21 21:05:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-21 21:05:17,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-11-21 21:05:17,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-21 21:05:17,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-21 21:05:17,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:17,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-21 21:05:17,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-21 21:05:17,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:17,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:17,483 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 50 flow. Second operand 3 states and 46 transitions. [2023-11-21 21:05:17,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 72 flow [2023-11-21 21:05:17,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:05:17,485 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 49 flow [2023-11-21 21:05:17,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-21 21:05:17,486 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-21 21:05:17,486 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 49 flow [2023-11-21 21:05:17,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-11-21 21:05:17,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:17,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 21:05:17,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:05:17,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:17,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1757957947, now seen corresponding path program 1 times [2023-11-21 21:05:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:17,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077898016] [2023-11-21 21:05:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:17,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:17,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 21:05:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:17,541 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 21:05:17,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 21:05:17,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-21 21:05:17,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-21 21:05:17,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-21 21:05:17,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-21 21:05:17,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-21 21:05:17,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-21 21:05:17,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:05:17,552 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 21:05:17,555 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 21:05:17,555 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 21:05:17,607 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:05:17,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:17,621 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2023-11-21 21:05:17,621 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 21:05:17,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 63 events. 12/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 170 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 44. Up to 3 conditions per place. [2023-11-21 21:05:17,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:17,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:17,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:05:17,627 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6a40048a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:05:17,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-21 21:05:17,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:05:17,629 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 21:05:17,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:17,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:17,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:17,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:17,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 269627, now seen corresponding path program 1 times [2023-11-21 21:05:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629005915] [2023-11-21 21:05:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:17,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629005915] [2023-11-21 21:05:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629005915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:17,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779921931] [2023-11-21 21:05:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:17,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-21 21:05:17,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:17,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:17,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-21 21:05:17,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:17,861 INFO L124 PetriNetUnfolderBase]: 409/762 cut-off events. [2023-11-21 21:05:17,861 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-21 21:05:17,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 762 events. 409/762 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3641 event pairs, 225 based on Foata normal form. 97/726 useless extension candidates. Maximal degree in co-relation 227. Up to 552 conditions per place. [2023-11-21 21:05:17,873 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-21 21:05:17,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 130 flow [2023-11-21 21:05:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-21 21:05:17,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-21 21:05:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-21 21:05:17,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-21 21:05:17,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:17,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-21 21:05:17,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-21 21:05:17,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:17,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:17,879 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 106 flow. Second operand 3 states and 79 transitions. [2023-11-21 21:05:17,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 130 flow [2023-11-21 21:05:17,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:05:17,882 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 88 flow [2023-11-21 21:05:17,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-21 21:05:17,884 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-21 21:05:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 88 flow [2023-11-21 21:05:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:17,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:17,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:05:17,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:17,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 269628, now seen corresponding path program 1 times [2023-11-21 21:05:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995118489] [2023-11-21 21:05:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:05:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995118489] [2023-11-21 21:05:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995118489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:18,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64007808] [2023-11-21 21:05:18,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:05:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:18,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-21 21:05:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 21:05:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-21 21:05:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:18,179 INFO L124 PetriNetUnfolderBase]: 301/577 cut-off events. [2023-11-21 21:05:18,179 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-21 21:05:18,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 577 events. 301/577 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2663 event pairs, 160 based on Foata normal form. 43/518 useless extension candidates. Maximal degree in co-relation 1000. Up to 405 conditions per place. [2023-11-21 21:05:18,186 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-21 21:05:18,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 128 flow [2023-11-21 21:05:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-21 21:05:18,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-21 21:05:18,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-21 21:05:18,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-21 21:05:18,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:18,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-21 21:05:18,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-21 21:05:18,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:18,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:18,198 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 88 flow. Second operand 3 states and 76 transitions. [2023-11-21 21:05:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 128 flow [2023-11-21 21:05:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:05:18,203 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 87 flow [2023-11-21 21:05:18,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-21 21:05:18,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-21 21:05:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 87 flow [2023-11-21 21:05:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 21:05:18,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:18,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:05:18,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:18,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:18,213 INFO L85 PathProgramCache]: Analyzing trace with hash -446580659, now seen corresponding path program 1 times [2023-11-21 21:05:18,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:05:18,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553791707] [2023-11-21 21:05:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:05:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:18,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 21:05:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:18,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 21:05:18,297 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 21:05:18,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2023-11-21 21:05:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-21 21:05:18,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-21 21:05:18,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-21 21:05:18,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-21 21:05:18,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-21 21:05:18,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-21 21:05:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 21:05:18,300 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 21:05:18,304 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-11-21 21:05:18,305 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 21:05:18,321 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-21 21:05:18,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:05:18 BasicIcfg [2023-11-21 21:05:18,332 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 21:05:18,333 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 21:05:18,333 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 21:05:18,334 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 21:05:18,334 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:16" (3/4) ... [2023-11-21 21:05:18,336 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 21:05:18,337 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 21:05:18,338 INFO L158 Benchmark]: Toolchain (without parser) took 3007.05ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 95.7MB in the beginning and 108.1MB in the end (delta: -12.4MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2023-11-21 21:05:18,338 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 144.7MB. Free memory is still 113.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:18,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 562.58ms. Allocated memory is still 144.7MB. Free memory was 95.7MB in the beginning and 75.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:18,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.87ms. Allocated memory is still 144.7MB. Free memory was 75.6MB in the beginning and 74.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:18,340 INFO L158 Benchmark]: Boogie Preprocessor took 32.64ms. Allocated memory is still 144.7MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:18,340 INFO L158 Benchmark]: RCFGBuilder took 492.79ms. Allocated memory is still 144.7MB. Free memory was 72.6MB in the beginning and 53.2MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:18,341 INFO L158 Benchmark]: TraceAbstraction took 1858.71ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 52.0MB in the beginning and 109.2MB in the end (delta: -57.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:18,341 INFO L158 Benchmark]: Witness Printer took 4.09ms. Allocated memory is still 190.8MB. Free memory was 109.2MB in the beginning and 108.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:18,344 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 144.7MB. Free memory is still 113.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 562.58ms. Allocated memory is still 144.7MB. Free memory was 95.7MB in the beginning and 75.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.87ms. Allocated memory is still 144.7MB. Free memory was 75.6MB in the beginning and 74.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.64ms. Allocated memory is still 144.7MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 492.79ms. Allocated memory is still 144.7MB. Free memory was 72.6MB in the beginning and 53.2MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 1858.71ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 52.0MB in the beginning and 109.2MB in the end (delta: -57.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.09ms. Allocated memory is still 190.8MB. Free memory was 109.2MB in the beginning and 108.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx 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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2023-11-21 21:05:21,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:05:21,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:05:21,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:05:21,728 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:05:21,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:05:21,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-21 21:05:24,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:05:25,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:05:25,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2023-11-21 21:05:25,281 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data/6aa1065b8/f89d6433f9dd4afab3045e4bfb1ea7ac/FLAG4a0dbe019 [2023-11-21 21:05:25,293 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/data/6aa1065b8/f89d6433f9dd4afab3045e4bfb1ea7ac [2023-11-21 21:05:25,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:05:25,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:05:25,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:25,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:05:25,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:05:25,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:25,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ec2a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25, skipping insertion in model container [2023-11-21 21:05:25,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:25,358 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:05:25,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:25,851 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:05:25,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:05:25,973 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:05:25,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25 WrapperNode [2023-11-21 21:05:25,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:05:25,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:25,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:05:25,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:05:25,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,058 INFO L138 Inliner]: procedures = 170, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-11-21 21:05:26,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:05:26,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:05:26,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:05:26,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:05:26,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,130 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:05:26,131 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:05:26,131 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:05:26,131 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:05:26,132 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2023-11-21 21:05:26,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:05:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:05:26,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:05:26,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:05:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 21:05:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 21:05:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:05:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:05:26,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:05:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 21:05:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 21:05:26,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:05:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:05:26,256 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:05:26,446 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:05:26,449 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:05:26,704 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:05:26,828 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:05:26,828 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 21:05:26,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:26 BoogieIcfgContainer [2023-11-21 21:05:26,830 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:05:26,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:05:26,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:05:26,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:05:26,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:25" (1/3) ... [2023-11-21 21:05:26,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b36a93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:26, skipping insertion in model container [2023-11-21 21:05:26,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (2/3) ... [2023-11-21 21:05:26,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b36a93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:26, skipping insertion in model container [2023-11-21 21:05:26,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:26" (3/3) ... [2023-11-21 21:05:26,839 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-11-21 21:05:26,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:05:26,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-21 21:05:26,860 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:05:26,926 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:05:26,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:27,010 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-21 21:05:27,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:27,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 92 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-21 21:05:27,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:27,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 29 transitions, 62 flow [2023-11-21 21:05:27,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:05:27,047 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@e0bf90c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:05:27,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 21:05:27,057 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:05:27,057 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 21:05:27,057 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:27,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:27,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:27,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 223949, now seen corresponding path program 1 times [2023-11-21 21:05:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:27,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349613091] [2023-11-21 21:05:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:27,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:27,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:27,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:27,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-21 21:05:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:27,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:05:27,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:27,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 21:05:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:27,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:05:27,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:05:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349613091] [2023-11-21 21:05:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349613091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:27,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546531592] [2023-11-21 21:05:27,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:27,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:05:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:27,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2023-11-21 21:05:27,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:27,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:27,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2023-11-21 21:05:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:27,448 INFO L124 PetriNetUnfolderBase]: 31/87 cut-off events. [2023-11-21 21:05:27,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 87 events. 31/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 279 event pairs, 15 based on Foata normal form. 8/83 useless extension candidates. Maximal degree in co-relation 130. Up to 54 conditions per place. [2023-11-21 21:05:27,451 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 12 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-21 21:05:27,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 74 flow [2023-11-21 21:05:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-21 21:05:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2023-11-21 21:05:27,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-21 21:05:27,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-21 21:05:27,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:27,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-21 21:05:27,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:27,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:27,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:27,478 INFO L175 Difference]: Start difference. First operand has 26 places, 29 transitions, 62 flow. Second operand 3 states and 47 transitions. [2023-11-21 21:05:27,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 74 flow [2023-11-21 21:05:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 22 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:05:27,512 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 50 flow [2023-11-21 21:05:27,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-11-21 21:05:27,521 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-21 21:05:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 50 flow [2023-11-21 21:05:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:27,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:27,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:27,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-21 21:05:27,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:27,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:27,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 223950, now seen corresponding path program 1 times [2023-11-21 21:05:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395074275] [2023-11-21 21:05:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:27,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:27,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:27,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-21 21:05:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:27,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 21:05:27,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:27,817 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 [2023-11-21 21:05:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:27,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:05:27,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:05:27,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395074275] [2023-11-21 21:05:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395074275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:27,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:27,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977448290] [2023-11-21 21:05:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:05:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:27,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2023-11-21 21:05:27,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-11-21 21:05:27,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:27,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2023-11-21 21:05:27,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:27,916 INFO L124 PetriNetUnfolderBase]: 22/65 cut-off events. [2023-11-21 21:05:27,916 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 21:05:27,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 65 events. 22/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 10 based on Foata normal form. 7/63 useless extension candidates. Maximal degree in co-relation 104. Up to 39 conditions per place. [2023-11-21 21:05:27,918 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-21 21:05:27,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 72 flow [2023-11-21 21:05:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-21 21:05:27,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-11-21 21:05:27,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-21 21:05:27,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-21 21:05:27,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:27,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-21 21:05:27,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-21 21:05:27,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:27,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:05:27,923 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 50 flow. Second operand 3 states and 46 transitions. [2023-11-21 21:05:27,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 72 flow [2023-11-21 21:05:27,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:05:27,925 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 49 flow [2023-11-21 21:05:27,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-21 21:05:27,927 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-11-21 21:05:27,927 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 49 flow [2023-11-21 21:05:27,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-11-21 21:05:27,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:27,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 21:05:27,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-21 21:05:28,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:28,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-21 21:05:28,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -733130299, now seen corresponding path program 1 times [2023-11-21 21:05:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:28,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740779468] [2023-11-21 21:05:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:28,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:28,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-21 21:05:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:28,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 21:05:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:28,235 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-21 21:05:28,235 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 21:05:28,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-21 21:05:28,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-21 21:05:28,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-21 21:05:28,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-21 21:05:28,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-21 21:05:28,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-21 21:05:28,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:05:28,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:28,441 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 21:05:28,443 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 21:05:28,444 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 21:05:28,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 21:05:28,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:28,494 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2023-11-21 21:05:28,495 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 21:05:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 63 events. 12/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 170 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 44. Up to 3 conditions per place. [2023-11-21 21:05:28,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:28,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 48 transitions, 106 flow [2023-11-21 21:05:28,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:05:28,500 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@e0bf90c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:05:28,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-21 21:05:28,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:05:28,502 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 21:05:28,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:05:28,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:28,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:28,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:28,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 271613, now seen corresponding path program 1 times [2023-11-21 21:05:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171562573] [2023-11-21 21:05:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:28,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:28,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:28,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-21 21:05:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:28,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:05:28,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:28,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-21 21:05:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:28,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:05:28,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:05:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171562573] [2023-11-21 21:05:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171562573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:28,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:28,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:28,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219339658] [2023-11-21 21:05:28,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:28,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:28,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:05:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:28,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-21 21:05:28,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:28,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:28,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-21 21:05:28,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:28,876 INFO L124 PetriNetUnfolderBase]: 409/762 cut-off events. [2023-11-21 21:05:28,876 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-21 21:05:28,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 762 events. 409/762 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3641 event pairs, 225 based on Foata normal form. 97/726 useless extension candidates. Maximal degree in co-relation 227. Up to 552 conditions per place. [2023-11-21 21:05:28,889 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 21 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-11-21 21:05:28,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 38 transitions, 130 flow [2023-11-21 21:05:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-21 21:05:28,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2023-11-21 21:05:28,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-21 21:05:28,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-21 21:05:28,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:28,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-21 21:05:28,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2023-11-21 21:05:28,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:28,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:28,896 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 106 flow. Second operand 3 states and 79 transitions. [2023-11-21 21:05:28,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 38 transitions, 130 flow [2023-11-21 21:05:28,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:05:28,898 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 88 flow [2023-11-21 21:05:28,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-21 21:05:28,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-21 21:05:28,900 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 88 flow [2023-11-21 21:05:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:05:28,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:28,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:05:28,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:05:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:29,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:29,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash 271614, now seen corresponding path program 1 times [2023-11-21 21:05:29,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:29,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318846420] [2023-11-21 21:05:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:29,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-21 21:05:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:05:29,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 21:05:29,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:05:29,182 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 [2023-11-21 21:05:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:05:29,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:05:29,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:05:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318846420] [2023-11-21 21:05:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318846420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:05:29,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:05:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:05:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570465564] [2023-11-21 21:05:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:05:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:05:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:05:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:05:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:05:29,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-21 21:05:29,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 21:05:29,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:05:29,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-21 21:05:29,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:05:29,358 INFO L124 PetriNetUnfolderBase]: 301/577 cut-off events. [2023-11-21 21:05:29,358 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-21 21:05:29,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 577 events. 301/577 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2663 event pairs, 160 based on Foata normal form. 43/518 useless extension candidates. Maximal degree in co-relation 1000. Up to 405 conditions per place. [2023-11-21 21:05:29,365 INFO L140 encePairwiseOnDemand]: 46/48 looper letters, 20 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-21 21:05:29,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 128 flow [2023-11-21 21:05:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:05:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:05:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-21 21:05:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-21 21:05:29,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-21 21:05:29,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-21 21:05:29,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:05:29,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-21 21:05:29,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-21 21:05:29,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:29,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-11-21 21:05:29,375 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 88 flow. Second operand 3 states and 76 transitions. [2023-11-21 21:05:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 128 flow [2023-11-21 21:05:29,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:05:29,379 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 87 flow [2023-11-21 21:05:29,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-21 21:05:29,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2023-11-21 21:05:29,382 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 87 flow [2023-11-21 21:05:29,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 21:05:29,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:05:29,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:05:29,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:05:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:29,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-21 21:05:29,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:05:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 865278349, now seen corresponding path program 1 times [2023-11-21 21:05:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:05:29,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297407007] [2023-11-21 21:05:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:05:29,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:05:29,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 21:05:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-21 21:05:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:29,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 21:05:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 21:05:29,700 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-21 21:05:29,700 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 21:05:29,700 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 7 remaining) [2023-11-21 21:05:29,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-21 21:05:29,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-21 21:05:29,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-21 21:05:29,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-21 21:05:29,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-11-21 21:05:29,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-21 21:05:29,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-21 21:05:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16f47d22-5d97-486c-ad3d-efdd7450772b/bin/uautomizer-verify-bycVGegfSx/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 21:05:29,903 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 21:05:29,907 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-11-21 21:05:29,908 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 21:05:29,928 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-21 21:05:29,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:05:29 BasicIcfg [2023-11-21 21:05:29,955 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 21:05:29,956 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 21:05:29,956 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 21:05:29,956 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 21:05:29,957 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:26" (3/4) ... [2023-11-21 21:05:29,958 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 21:05:29,959 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 21:05:29,961 INFO L158 Benchmark]: Toolchain (without parser) took 4664.24ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 72.9MB in the beginning and 64.1MB in the end (delta: 8.8MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,961 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 60.8MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:29,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 676.91ms. Allocated memory is still 94.4MB. Free memory was 72.7MB in the beginning and 52.3MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,962 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.86ms. Allocated memory is still 94.4MB. Free memory was 52.3MB in the beginning and 50.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,962 INFO L158 Benchmark]: Boogie Preprocessor took 70.01ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 48.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,963 INFO L158 Benchmark]: RCFGBuilder took 699.83ms. Allocated memory is still 94.4MB. Free memory was 48.6MB in the beginning and 52.2MB in the end (delta: -3.6MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,963 INFO L158 Benchmark]: TraceAbstraction took 3122.80ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 51.5MB in the beginning and 64.1MB in the end (delta: -12.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2023-11-21 21:05:29,964 INFO L158 Benchmark]: Witness Printer took 3.76ms. Allocated memory is still 113.2MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:05:29,966 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 60.8MB. Free memory was 36.8MB in the beginning and 36.7MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 676.91ms. Allocated memory is still 94.4MB. Free memory was 72.7MB in the beginning and 52.3MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.86ms. Allocated memory is still 94.4MB. Free memory was 52.3MB in the beginning and 50.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.01ms. Allocated memory is still 94.4MB. Free memory was 50.2MB in the beginning and 48.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 699.83ms. Allocated memory is still 94.4MB. Free memory was 48.6MB in the beginning and 52.2MB in the end (delta: -3.6MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3122.80ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 51.5MB in the beginning and 64.1MB in the end (delta: -12.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Witness Printer took 3.76ms. Allocated memory is still 113.2MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i