./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.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_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/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_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/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_44fe3477-e03e-429e-89e8-201cfd143317/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 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:12:34,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:12:34,583 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:12:34,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:12:34,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:12:34,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:12:34,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:12:34,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:12:34,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:12:34,634 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:12:34,634 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:12:34,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:12:34,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:12:34,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:12:34,637 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:12:34,637 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:12:34,637 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:12:34,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:12:34,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:12:34,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:12:34,639 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:12:34,643 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:12:34,644 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:12:34,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:12:34,645 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:12:34,645 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:12:34,645 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:12:34,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:12:34,646 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:12:34,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:12:34,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:12:34,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:12:34,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:12:34,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:12:34,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:12:34,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:12:34,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:12:34,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:12:34,652 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:12:34,652 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:12:34,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:12:34,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:12:34,655 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_44fe3477-e03e-429e-89e8-201cfd143317/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c579ed20cf5b381709dcc4ef9fbcf839f80c68ac017a29b947b11bd3a57dd56 [2024-10-31 22:12:34,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:12:35,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:12:35,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:12:35,019 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:12:35,020 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:12:35,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c Unable to find full path for "g++" [2024-10-31 22:12:37,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:12:37,280 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:12:37,281 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2024-10-31 22:12:37,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/data/07ee486ed/d9d3dbb7ead34a2d9af06e1de72ef284/FLAGeb2b15133 [2024-10-31 22:12:37,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/data/07ee486ed/d9d3dbb7ead34a2d9af06e1de72ef284 [2024-10-31 22:12:37,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:12:37,311 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:12:37,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:37,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:12:37,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:12:37,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31515325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37, skipping insertion in model container [2024-10-31 22:12:37,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,357 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:12:37,636 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:12:37,646 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:12:37,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:37,666 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:12:37,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:12:37,714 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:12:37,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37 WrapperNode [2024-10-31 22:12:37,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:12:37,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:12:37,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:12:37,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:12:37,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,767 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 186 [2024-10-31 22:12:37,768 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:12:37,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:12:37,769 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:12:37,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:12:37,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,804 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 3, 9]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-10-31 22:12:37,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,843 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:12:37,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:12:37,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:12:37,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:12:37,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (1/1) ... [2024-10-31 22:12:37,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:12:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:37,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:12:37,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:12:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:12:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:12:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:12:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:12:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:12:37,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:12:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:12:37,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:12:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:12:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:12:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:12:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:12:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:12:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:12:37,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:12:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:12:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:12:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:12:37,934 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:12:38,107 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:12:38,110 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:12:38,736 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:12:38,736 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:12:39,214 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:12:39,214 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-31 22:12:39,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:12:39 BoogieIcfgContainer [2024-10-31 22:12:39,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:12:39,225 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:12:39,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:12:39,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:12:39,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:12:37" (1/3) ... [2024-10-31 22:12:39,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f99a60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:12:39, skipping insertion in model container [2024-10-31 22:12:39,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:12:37" (2/3) ... [2024-10-31 22:12:39,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f99a60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:12:39, skipping insertion in model container [2024-10-31 22:12:39,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:12:39" (3/3) ... [2024-10-31 22:12:39,236 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2024-10-31 22:12:39,260 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:12:39,261 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2024-10-31 22:12:39,261 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:12:39,359 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:12:39,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 146 flow [2024-10-31 22:12:39,468 INFO L124 PetriNetUnfolderBase]: 7/64 cut-off events. [2024-10-31 22:12:39,468 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:12:39,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 7/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-10-31 22:12:39,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 146 flow [2024-10-31 22:12:39,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 63 transitions, 138 flow [2024-10-31 22:12:39,495 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:12:39,503 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;@6e84de94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:12:39,503 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-10-31 22:12:39,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:12:39,511 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:12:39,512 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:12:39,512 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:39,514 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:12:39,514 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:12:39,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 724435, now seen corresponding path program 1 times [2024-10-31 22:12:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:39,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85012973] [2024-10-31 22:12:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:39,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85012973] [2024-10-31 22:12:39,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85012973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:39,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:39,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:12:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608705685] [2024-10-31 22:12:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:39,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:12:39,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:12:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:12:40,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 22:12:40,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:40,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:40,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 22:12:40,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:40,267 INFO L124 PetriNetUnfolderBase]: 58/178 cut-off events. [2024-10-31 22:12:40,268 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:12:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 178 events. 58/178 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 699 event pairs, 30 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 222. Up to 96 conditions per place. [2024-10-31 22:12:40,272 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 25 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-10-31 22:12:40,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 186 flow [2024-10-31 22:12:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:12:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:12:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-10-31 22:12:40,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-10-31 22:12:40,291 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-10-31 22:12:40,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 186 flow [2024-10-31 22:12:40,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:12:40,303 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 128 flow [2024-10-31 22:12:40,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-10-31 22:12:40,311 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2024-10-31 22:12:40,312 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 128 flow [2024-10-31 22:12:40,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:40,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:40,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:12:40,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:12:40,313 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:12:40,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 724436, now seen corresponding path program 1 times [2024-10-31 22:12:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:40,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645684644] [2024-10-31 22:12:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:12:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592812642] [2024-10-31 22:12:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:40,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:40,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:12:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:40,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:12:40,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:40,878 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 22:12:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:46,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:12:46,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:46,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645684644] [2024-10-31 22:12:46,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:12:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592812642] [2024-10-31 22:12:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592812642] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:46,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:46,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:12:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709943161] [2024-10-31 22:12:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:46,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:12:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:12:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2024-10-31 22:12:50,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-31 22:12:54,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-31 22:12:59,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-31 22:13:03,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-31 22:13:07,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-31 22:13:07,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2024-10-31 22:13:07,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:07,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:07,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2024-10-31 22:13:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:09,742 INFO L124 PetriNetUnfolderBase]: 201/407 cut-off events. [2024-10-31 22:13:09,743 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:13:09,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 407 events. 201/407 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1808 event pairs, 151 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 733. Up to 348 conditions per place. [2024-10-31 22:13:09,749 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 41 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-10-31 22:13:09,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 216 flow [2024-10-31 22:13:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-10-31 22:13:09,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-10-31 22:13:09,754 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 128 flow. Second operand 4 states and 106 transitions. [2024-10-31 22:13:09,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 216 flow [2024-10-31 22:13:09,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:09,757 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 126 flow [2024-10-31 22:13:09,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-10-31 22:13:09,759 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2024-10-31 22:13:09,759 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 126 flow [2024-10-31 22:13:09,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:09,759 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:09,760 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:13:09,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:13:09,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:09,961 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:13:09,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 22458754, now seen corresponding path program 1 times [2024-10-31 22:13:09,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:09,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226187311] [2024-10-31 22:13:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:09,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:10,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226187311] [2024-10-31 22:13:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226187311] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:10,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187712091] [2024-10-31 22:13:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:10,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:10,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 66 [2024-10-31 22:13:10,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:10,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:10,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 66 [2024-10-31 22:13:10,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:10,611 INFO L124 PetriNetUnfolderBase]: 60/185 cut-off events. [2024-10-31 22:13:10,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:13:10,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 185 events. 60/185 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 715 event pairs, 30 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 272. Up to 107 conditions per place. [2024-10-31 22:13:10,613 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 29 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-10-31 22:13:10,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 218 flow [2024-10-31 22:13:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-10-31 22:13:10,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6704545454545454 [2024-10-31 22:13:10,616 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 126 flow. Second operand 4 states and 177 transitions. [2024-10-31 22:13:10,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 218 flow [2024-10-31 22:13:10,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 204 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:13:10,619 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 158 flow [2024-10-31 22:13:10,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2024-10-31 22:13:10,620 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2024-10-31 22:13:10,620 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 158 flow [2024-10-31 22:13:10,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:10,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:10,621 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:13:10,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:13:10,621 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:13:10,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash 107577511, now seen corresponding path program 1 times [2024-10-31 22:13:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881056672] [2024-10-31 22:13:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:11,116 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 22:13:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881056672] [2024-10-31 22:13:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881056672] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129601564] [2024-10-31 22:13:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:11,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:11,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:11,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:11,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:13:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:11,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:13:11,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:11,239 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 22:13:11,525 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:13:11,526 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 22:13:11,604 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 22:13:11,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:11,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129601564] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:11,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:13:11,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-10-31 22:13:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621014050] [2024-10-31 22:13:11,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:11,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:13:12,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 22:13:12,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:12,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:12,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 22:13:12,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:12,711 INFO L124 PetriNetUnfolderBase]: 115/353 cut-off events. [2024-10-31 22:13:12,711 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:13:12,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 353 events. 115/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1794 event pairs, 60 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 292. Up to 107 conditions per place. [2024-10-31 22:13:12,718 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 55 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2024-10-31 22:13:12,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 336 flow [2024-10-31 22:13:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:13:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:13:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-10-31 22:13:12,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-10-31 22:13:12,720 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 158 flow. Second operand 5 states and 222 transitions. [2024-10-31 22:13:12,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 336 flow [2024-10-31 22:13:12,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:13:12,724 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 175 flow [2024-10-31 22:13:12,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-10-31 22:13:12,725 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2024-10-31 22:13:12,725 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 175 flow [2024-10-31 22:13:12,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:12,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:12,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:13:12,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:13:12,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44fe3477-e03e-429e-89e8-201cfd143317/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:12,927 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:13:12,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 108124106, now seen corresponding path program 1 times [2024-10-31 22:13:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182112940] [2024-10-31 22:13:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182112940] [2024-10-31 22:13:13,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182112940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:13,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:13,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544323956] [2024-10-31 22:13:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:13,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:13:13,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 22:13:13,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:13,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:13,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 22:13:13,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:14,439 INFO L124 PetriNetUnfolderBase]: 139/391 cut-off events. [2024-10-31 22:13:14,440 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:13:14,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 391 events. 139/391 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1971 event pairs, 76 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 340. Up to 247 conditions per place. [2024-10-31 22:13:14,443 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-10-31 22:13:14,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 273 flow [2024-10-31 22:13:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:13:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:13:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2024-10-31 22:13:14,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-31 22:13:14,446 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 175 flow. Second operand 6 states and 231 transitions. [2024-10-31 22:13:14,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 273 flow [2024-10-31 22:13:14,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:14,449 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 216 flow [2024-10-31 22:13:14,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-10-31 22:13:14,450 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2024-10-31 22:13:14,450 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 216 flow [2024-10-31 22:13:14,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:14,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:14,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:13:14,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:13:14,451 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:13:14,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash 108124105, now seen corresponding path program 1 times [2024-10-31 22:13:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498793856] [2024-10-31 22:13:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:14,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:14,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:14,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498793856] [2024-10-31 22:13:14,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498793856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:14,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:14,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856756068] [2024-10-31 22:13:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:14,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:14,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-31 22:13:14,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:14,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:14,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-31 22:13:14,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:14,823 INFO L124 PetriNetUnfolderBase]: 139/373 cut-off events. [2024-10-31 22:13:14,823 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 22:13:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 373 events. 139/373 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1773 event pairs, 76 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 638. Up to 245 conditions per place. [2024-10-31 22:13:14,826 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 37 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-10-31 22:13:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 290 flow [2024-10-31 22:13:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-31 22:13:14,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-10-31 22:13:14,828 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 216 flow. Second operand 3 states and 124 transitions. [2024-10-31 22:13:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 290 flow [2024-10-31 22:13:14,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:14,831 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 209 flow [2024-10-31 22:13:14,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-10-31 22:13:14,832 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-10-31 22:13:14,832 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 209 flow [2024-10-31 22:13:14,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:14,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:14,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:13:14,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:13:14,833 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-10-31 22:13:14,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash 108124079, now seen corresponding path program 1 times [2024-10-31 22:13:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:14,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199526824] [2024-10-31 22:13:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:15,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199526824] [2024-10-31 22:13:15,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199526824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:15,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:15,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:15,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380987999] [2024-10-31 22:13:15,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:15,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20