./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:41,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:41,650 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:56:41,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:41,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:41,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:41,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:41,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:41,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:41,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:41,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:41,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:41,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:41,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:41,704 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:41,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:41,705 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:41,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:41,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:41,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:41,706 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:56:41,710 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:56:41,711 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:56:41,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:41,711 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:56:41,711 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:41,712 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:56:41,721 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:41,722 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:41,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:41,723 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:41,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:41,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:41,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:41,725 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:41,725 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:41,726 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:41,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:41,726 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:41,726 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:41,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:41,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:41,727 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_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-10-31 21:56:42,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:42,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:42,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:42,049 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:42,049 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:42,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c Unable to find full path for "g++" [2024-10-31 21:56:44,191 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:44,377 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:44,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-31 21:56:44,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/data/ebb169a31/63b5f6553cee48c2af7c6554e42a84b0/FLAGa6a0b4aae [2024-10-31 21:56:44,402 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/data/ebb169a31/63b5f6553cee48c2af7c6554e42a84b0 [2024-10-31 21:56:44,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:44,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:44,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:44,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:44,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:44,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4710cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44, skipping insertion in model container [2024-10-31 21:56:44,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,452 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:44,704 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 21:56:44,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:44,720 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:44,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:44,781 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:44,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44 WrapperNode [2024-10-31 21:56:44,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:44,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:44,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:44,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:44,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,836 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 224 [2024-10-31 21:56:44,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:44,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:44,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:44,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:44,849 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,871 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-31 21:56:44,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:44,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:44,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:44,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:44,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (1/1) ... [2024-10-31 21:56:44,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:44,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:44,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:45,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:45,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:56:45,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:56:45,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:56:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:56:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:56:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:56:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:56:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:56:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:56:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:56:45,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:56:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:56:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:56:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:56:45,010 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:56:45,189 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:45,192 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:45,999 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:56:45,999 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:46,479 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:46,479 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 21:56:46,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:46 BoogieIcfgContainer [2024-10-31 21:56:46,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:46,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:46,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:46,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:46,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:44" (1/3) ... [2024-10-31 21:56:46,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3978bbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:46, skipping insertion in model container [2024-10-31 21:56:46,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:44" (2/3) ... [2024-10-31 21:56:46,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3978bbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:46, skipping insertion in model container [2024-10-31 21:56:46,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:46" (3/3) ... [2024-10-31 21:56:46,492 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-10-31 21:56:46,514 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:46,515 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-31 21:56:46,515 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:56:46,603 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:56:46,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-10-31 21:56:46,693 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-10-31 21:56:46,693 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:56:46,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 235 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-10-31 21:56:46,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-10-31 21:56:46,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-10-31 21:56:46,721 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:46,727 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ab12fca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:46,727 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-10-31 21:56:46,731 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:56:46,731 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 21:56:46,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:56:46,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:46,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:56:46,733 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:46,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash 904789, now seen corresponding path program 1 times [2024-10-31 21:56:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:46,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572631748] [2024-10-31 21:56:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:47,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572631748] [2024-10-31 21:56:47,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572631748] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:56:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145494876] [2024-10-31 21:56:47,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:47,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:47,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:56:47,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:47,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:47,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:56:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:48,242 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-10-31 21:56:48,242 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-10-31 21:56:48,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29802 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-10-31 21:56:48,302 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-10-31 21:56:48,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-10-31 21:56:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-10-31 21:56:48,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-10-31 21:56:48,321 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-10-31 21:56:48,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-10-31 21:56:48,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:56:48,342 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-10-31 21:56:48,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-10-31 21:56:48,351 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-10-31 21:56:48,351 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-10-31 21:56:48,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:48,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:48,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:56:48,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:48,353 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:48,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 904790, now seen corresponding path program 1 times [2024-10-31 21:56:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:48,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199534817] [2024-10-31 21:56:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:48,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:48,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199534817] [2024-10-31 21:56:48,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199534817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:48,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:48,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:48,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728025044] [2024-10-31 21:56:48,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:48,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:48,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:48,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:48,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:49,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:56:49,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:49,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:49,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:56:49,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:49,780 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-10-31 21:56:49,781 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 21:56:49,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29796 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-10-31 21:56:49,816 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-10-31 21:56:49,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-10-31 21:56:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-10-31 21:56:49,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-10-31 21:56:49,822 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-10-31 21:56:49,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-10-31 21:56:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:49,826 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-10-31 21:56:49,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-10-31 21:56:49,827 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-10-31 21:56:49,828 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-10-31 21:56:49,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:49,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:49,829 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 21:56:49,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:56:49,829 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:49,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 869532509, now seen corresponding path program 1 times [2024-10-31 21:56:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:49,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939868802] [2024-10-31 21:56:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:49,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:50,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:50,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939868802] [2024-10-31 21:56:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939868802] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072828777] [2024-10-31 21:56:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:50,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:50,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:50,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:56:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:50,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 21:56:50,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:50,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:56:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:50,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072828777] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:50,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:50,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 21:56:50,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794082615] [2024-10-31 21:56:50,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:50,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:56:50,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:56:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:51,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:56:51,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:51,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:51,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:56:51,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:52,286 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-10-31 21:56:52,287 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 21:56:52,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29832 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-10-31 21:56:52,331 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-10-31 21:56:52,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-10-31 21:56:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:56:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-10-31 21:56:52,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-10-31 21:56:52,334 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-10-31 21:56:52,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-10-31 21:56:52,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:52,338 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-10-31 21:56:52,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-10-31 21:56:52,341 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-10-31 21:56:52,342 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-10-31 21:56:52,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:52,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:52,343 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 21:56:52,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:56:52,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:52,548 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:52,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1185706500, now seen corresponding path program 1 times [2024-10-31 21:56:52,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:52,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066095485] [2024-10-31 21:56:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:52,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:52,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066095485] [2024-10-31 21:56:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066095485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:52,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284750709] [2024-10-31 21:56:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:52,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:52,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:52,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:56:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:52,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 21:56:52,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:52,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:56:53,105 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 21:56:53,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-10-31 21:56:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:53,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284750709] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:56:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-10-31 21:56:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835037907] [2024-10-31 21:56:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:53,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:56:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:56:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:53,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:56:53,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:53,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:53,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:56:53,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:54,085 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-10-31 21:56:54,086 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-10-31 21:56:54,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29792 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-10-31 21:56:54,116 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-10-31 21:56:54,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-10-31 21:56:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-10-31 21:56:54,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-10-31 21:56:54,118 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-10-31 21:56:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-10-31 21:56:54,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:54,121 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-10-31 21:56:54,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-10-31 21:56:54,122 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-10-31 21:56:54,122 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-10-31 21:56:54,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:54,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:54,123 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:54,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:56:54,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:54,328 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:54,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1897801947, now seen corresponding path program 1 times [2024-10-31 21:56:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366530078] [2024-10-31 21:56:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:56:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366530078] [2024-10-31 21:56:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366530078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116076822] [2024-10-31 21:56:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:54,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:54,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-31 21:56:54,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:54,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:54,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-31 21:56:54,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:55,017 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-10-31 21:56:55,018 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-10-31 21:56:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29835 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-10-31 21:56:55,049 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-10-31 21:56:55,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-10-31 21:56:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-10-31 21:56:55,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-10-31 21:56:55,051 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-10-31 21:56:55,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-10-31 21:56:55,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:55,054 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-10-31 21:56:55,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-10-31 21:56:55,055 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-10-31 21:56:55,055 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-10-31 21:56:55,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:55,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:55,056 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:55,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:56:55,057 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:55,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1297642248, now seen corresponding path program 1 times [2024-10-31 21:56:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:55,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217811097] [2024-10-31 21:56:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:55,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217811097] [2024-10-31 21:56:55,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217811097] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372852754] [2024-10-31 21:56:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:55,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:55,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:55,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:56:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:55,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 21:56:55,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:55,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:55,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372852754] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:55,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:55,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 21:56:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383975647] [2024-10-31 21:56:55,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:55,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 21:56:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 21:56:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:56:55,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-31 21:56:55,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:55,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:55,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-31 21:56:55,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:57,026 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-10-31 21:56:57,026 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-10-31 21:56:57,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63404 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-10-31 21:56:57,089 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-10-31 21:56:57,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-10-31 21:56:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-10-31 21:56:57,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-10-31 21:56:57,092 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-10-31 21:56:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-10-31 21:56:57,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:57,095 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-10-31 21:56:57,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-10-31 21:56:57,096 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-10-31 21:56:57,097 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-10-31 21:56:57,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:57,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:57,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-10-31 21:56:57,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:57,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:56:57,302 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:56:57,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 35474017, now seen corresponding path program 2 times [2024-10-31 21:56:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318649353] [2024-10-31 21:56:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:57,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318649353] [2024-10-31 21:56:57,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318649353] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511888211] [2024-10-31 21:56:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:57,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:57,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:57,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:57,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:57,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:56:57,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:57,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:56:57,982 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 21:56:57,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-10-31 21:56:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:58,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:58,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511888211] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:58,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:58,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-31 21:56:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214769967] [2024-10-31 21:56:58,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:58,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 21:56:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 21:56:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:56:59,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:56:59,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:59,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:59,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:56:59,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:02,027 INFO L124 PetriNetUnfolderBase]: 5916/9288 cut-off events. [2024-10-31 21:57:02,027 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-10-31 21:57:02,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17381 conditions, 9288 events. 5916/9288 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63466 event pairs, 4268 based on Foata normal form. 8/6529 useless extension candidates. Maximal degree in co-relation 8691. Up to 3894 conditions per place. [2024-10-31 21:57:02,089 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 101 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-10-31 21:57:02,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 807 flow [2024-10-31 21:57:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:57:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 21:57:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 542 transitions. [2024-10-31 21:57:02,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5074906367041199 [2024-10-31 21:57:02,092 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 12 states and 542 transitions. [2024-10-31 21:57:02,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 807 flow [2024-10-31 21:57:02,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 779 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-10-31 21:57:02,096 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 456 flow [2024-10-31 21:57:02,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-10-31 21:57:02,097 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2024-10-31 21:57:02,098 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 456 flow [2024-10-31 21:57:02,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:57:02,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:02,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:02,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:02,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 21:57:02,303 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:57:02,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash -938285925, now seen corresponding path program 1 times [2024-10-31 21:57:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122201322] [2024-10-31 21:57:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:57:02,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122201322] [2024-10-31 21:57:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122201322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:02,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:57:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359912407] [2024-10-31 21:57:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:02,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:57:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:57:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:02,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-10-31 21:57:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:57:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-10-31 21:57:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:57:04,041 INFO L124 PetriNetUnfolderBase]: 5982/9620 cut-off events. [2024-10-31 21:57:04,042 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-10-31 21:57:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 9620 events. 5982/9620 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65788 event pairs, 4376 based on Foata normal form. 0/6848 useless extension candidates. Maximal degree in co-relation 17804. Up to 7873 conditions per place. [2024-10-31 21:57:04,095 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 67 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-10-31 21:57:04,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 594 flow [2024-10-31 21:57:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:57:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-10-31 21:57:04,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-10-31 21:57:04,097 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 456 flow. Second operand 5 states and 194 transitions. [2024-10-31 21:57:04,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 594 flow [2024-10-31 21:57:04,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 561 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-31 21:57:04,101 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 427 flow [2024-10-31 21:57:04,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-10-31 21:57:04,102 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2024-10-31 21:57:04,102 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 427 flow [2024-10-31 21:57:04,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:57:04,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:57:04,103 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:04,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:57:04,103 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-31 21:57:04,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash -938285924, now seen corresponding path program 1 times [2024-10-31 21:57:04,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:04,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216290995] [2024-10-31 21:57:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:57:04,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:04,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216290995] [2024-10-31 21:57:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216290995] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:04,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181285168] [2024-10-31 21:57:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:04,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:04,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:04,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c79918ee-cfdf-4b28-b3a3-8cc28d39f908/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:57:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 21:57:04,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:04,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:57:04,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:57:04,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 21:57:04,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 21:57:04,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 21:57:04,958 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-10-31 21:57:04,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-10-31 21:57:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:57:05,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:57:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:57:05,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181285168] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:05,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:57:05,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-10-31 21:57:05,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233276534] [2024-10-31 21:57:05,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:05,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:57:05,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:57:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:57:06,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-31 21:57:06,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:57:06,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:57:06,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-31 21:57:06,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand