./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:38:02,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:38:02,776 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:38:02,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:38:02,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:38:02,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:38:02,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:38:02,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:38:02,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:38:02,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:38:02,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:38:02,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:38:02,811 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:38:02,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:38:02,813 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:38:02,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:38:02,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:38:02,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:38:02,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:38:02,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:38:02,815 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:38:02,817 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:38:02,817 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:38:02,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:38:02,817 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:38:02,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:38:02,818 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:38:02,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:38:02,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:38:02,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:38:02,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:38:02,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:38:02,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:38:02,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:38:02,820 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:38:02,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:38:02,820 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:38:02,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:38:02,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:38:02,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:38:02,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:38:02,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:38:02,822 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2024-11-19 09:38:03,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:38:03,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:38:03,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:38:03,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:38:03,159 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:38:03,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-19 09:38:04,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:38:05,031 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:38:05,032 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-11-19 09:38:05,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc685fea/7b248eb312ea4befa60d0443f05d406f/FLAG5116a4616 [2024-11-19 09:38:05,230 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc685fea/7b248eb312ea4befa60d0443f05d406f [2024-11-19 09:38:05,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:38:05,238 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:38:05,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:38:05,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:38:05,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:38:05,249 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:05,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32923f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05, skipping insertion in model container [2024-11-19 09:38:05,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:05,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:38:05,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:38:05,803 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:38:05,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:38:05,929 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:38:05,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05 WrapperNode [2024-11-19 09:38:05,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:38:05,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:38:05,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:38:05,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:38:05,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:05,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,001 INFO L138 Inliner]: procedures = 372, calls = 95, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 229 [2024-11-19 09:38:06,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:38:06,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:38:06,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:38:06,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:38:06,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,019 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,040 INFO L175 MemorySlicer]: Split 90 memory accesses to 3 slices as follows [50, 24, 16]. 56 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 0, 10]. The 19 writes are split as follows [0, 18, 1]. [2024-11-19 09:38:06,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,056 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:38:06,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:38:06,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:38:06,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:38:06,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (1/1) ... [2024-11-19 09:38:06,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:38:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:06,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:38:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:38:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 09:38:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-19 09:38:06,136 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-19 09:38:06,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:38:06,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:38:06,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:38:06,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:38:06,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:38:06,140 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:38:06,335 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:38:06,337 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:38:06,997 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:38:06,997 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:38:07,318 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:38:07,319 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 09:38:07,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:38:07 BoogieIcfgContainer [2024-11-19 09:38:07,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:38:07,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:38:07,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:38:07,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:38:07,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:38:05" (1/3) ... [2024-11-19 09:38:07,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fab6480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:38:07, skipping insertion in model container [2024-11-19 09:38:07,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:38:05" (2/3) ... [2024-11-19 09:38:07,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fab6480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:38:07, skipping insertion in model container [2024-11-19 09:38:07,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:38:07" (3/3) ... [2024-11-19 09:38:07,326 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2024-11-19 09:38:07,343 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:38:07,343 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2024-11-19 09:38:07,343 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:38:07,409 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 09:38:07,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 218 flow [2024-11-19 09:38:07,466 INFO L124 PetriNetUnfolderBase]: 1/106 cut-off events. [2024-11-19 09:38:07,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:07,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 106 events. 1/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 328 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2024-11-19 09:38:07,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 218 flow [2024-11-19 09:38:07,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 215 flow [2024-11-19 09:38:07,480 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:38:07,485 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;@56a80987, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:38:07,485 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2024-11-19 09:38:07,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:38:07,489 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-19 09:38:07,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:07,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:07,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:38:07,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:07,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 661789, now seen corresponding path program 1 times [2024-11-19 09:38:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408493012] [2024-11-19 09:38:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:07,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:07,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408493012] [2024-11-19 09:38:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408493012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:07,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:07,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:38:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446849577] [2024-11-19 09:38:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:07,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:38:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:38:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:38:07,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 107 [2024-11-19 09:38:07,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:07,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:07,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 107 [2024-11-19 09:38:07,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:08,010 INFO L124 PetriNetUnfolderBase]: 64/293 cut-off events. [2024-11-19 09:38:08,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 293 events. 64/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1323 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2024-11-19 09:38:08,014 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 30 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-11-19 09:38:08,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 275 flow [2024-11-19 09:38:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2024-11-19 09:38:08,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2024-11-19 09:38:08,026 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 215 flow. Second operand 3 states and 229 transitions. [2024-11-19 09:38:08,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 275 flow [2024-11-19 09:38:08,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:08,030 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 214 flow [2024-11-19 09:38:08,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-11-19 09:38:08,034 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -7 predicate places. [2024-11-19 09:38:08,034 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 214 flow [2024-11-19 09:38:08,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:08,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:08,035 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:38:08,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:38:08,035 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:08,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash 661790, now seen corresponding path program 1 times [2024-11-19 09:38:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663244335] [2024-11-19 09:38:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:08,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663244335] [2024-11-19 09:38:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663244335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:08,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:08,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:38:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423919345] [2024-11-19 09:38:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:08,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:38:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:38:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:38:08,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2024-11-19 09:38:08,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 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) [2024-11-19 09:38:08,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:08,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2024-11-19 09:38:08,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:08,279 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-11-19 09:38:08,279 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:38:08,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 285 events. 64/285 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1284 event pairs, 63 based on Foata normal form. 8/226 useless extension candidates. Maximal degree in co-relation 395. Up to 157 conditions per place. [2024-11-19 09:38:08,281 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 26 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-11-19 09:38:08,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 266 flow [2024-11-19 09:38:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2024-11-19 09:38:08,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383177570093458 [2024-11-19 09:38:08,284 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 214 flow. Second operand 3 states and 237 transitions. [2024-11-19 09:38:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 266 flow [2024-11-19 09:38:08,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:08,286 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 198 flow [2024-11-19 09:38:08,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-11-19 09:38:08,286 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-11-19 09:38:08,287 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 198 flow [2024-11-19 09:38:08,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 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) [2024-11-19 09:38:08,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:08,287 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:38:08,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:38:08,288 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:08,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 636000131, now seen corresponding path program 1 times [2024-11-19 09:38:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:08,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111568364] [2024-11-19 09:38:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:08,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:08,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111568364] [2024-11-19 09:38:08,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111568364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:08,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:08,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:38:08,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158221401] [2024-11-19 09:38:08,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:08,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:38:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:38:08,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:38:08,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-11-19 09:38:08,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:08,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:08,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-11-19 09:38:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:08,709 INFO L124 PetriNetUnfolderBase]: 73/305 cut-off events. [2024-11-19 09:38:08,710 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:38:08,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 305 events. 73/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1389 event pairs, 72 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 437. Up to 183 conditions per place. [2024-11-19 09:38:08,713 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 38 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2024-11-19 09:38:08,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 264 flow [2024-11-19 09:38:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:38:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:38:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2024-11-19 09:38:08,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.719626168224299 [2024-11-19 09:38:08,715 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 198 flow. Second operand 3 states and 231 transitions. [2024-11-19 09:38:08,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 264 flow [2024-11-19 09:38:08,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:08,718 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 172 flow [2024-11-19 09:38:08,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-19 09:38:08,718 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-11-19 09:38:08,719 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 172 flow [2024-11-19 09:38:08,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:08,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:08,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:38:08,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:38:08,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:08,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 636000132, now seen corresponding path program 1 times [2024-11-19 09:38:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576841850] [2024-11-19 09:38:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:08,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576841850] [2024-11-19 09:38:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576841850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:08,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:38:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548486950] [2024-11-19 09:38:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:08,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:09,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2024-11-19 09:38:09,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:09,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:09,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2024-11-19 09:38:09,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:09,290 INFO L124 PetriNetUnfolderBase]: 64/291 cut-off events. [2024-11-19 09:38:09,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:38:09,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 291 events. 64/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1224 event pairs, 63 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 460. Up to 163 conditions per place. [2024-11-19 09:38:09,301 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 37 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2024-11-19 09:38:09,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 272 flow [2024-11-19 09:38:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:38:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:38:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-19 09:38:09,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6401869158878505 [2024-11-19 09:38:09,303 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 172 flow. Second operand 4 states and 274 transitions. [2024-11-19 09:38:09,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 272 flow [2024-11-19 09:38:09,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:09,306 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 219 flow [2024-11-19 09:38:09,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-19 09:38:09,307 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2024-11-19 09:38:09,307 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 219 flow [2024-11-19 09:38:09,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:09,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:09,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:09,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:38:09,308 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:09,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1245755487, now seen corresponding path program 1 times [2024-11-19 09:38:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230884605] [2024-11-19 09:38:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:09,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:09,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230884605] [2024-11-19 09:38:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230884605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:09,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:09,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:38:09,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302115255] [2024-11-19 09:38:09,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:09,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:38:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:38:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:38:09,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-19 09:38:09,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:09,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:09,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-19 09:38:09,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:09,923 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-11-19 09:38:09,924 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:38:09,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 285 events. 64/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1182 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 482. Up to 154 conditions per place. [2024-11-19 09:38:09,925 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 30 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-11-19 09:38:09,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 307 flow [2024-11-19 09:38:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:38:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:38:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2024-11-19 09:38:09,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5408878504672897 [2024-11-19 09:38:09,927 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 219 flow. Second operand 8 states and 463 transitions. [2024-11-19 09:38:09,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 307 flow [2024-11-19 09:38:09,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:38:09,929 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 245 flow [2024-11-19 09:38:09,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-11-19 09:38:09,929 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-11-19 09:38:09,930 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 245 flow [2024-11-19 09:38:09,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:09,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:09,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:09,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:38:09,934 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:09,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1245755488, now seen corresponding path program 1 times [2024-11-19 09:38:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933184282] [2024-11-19 09:38:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:10,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:10,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933184282] [2024-11-19 09:38:10,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933184282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:10,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:38:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705681261] [2024-11-19 09:38:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:10,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:38:10,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:38:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:38:10,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2024-11-19 09:38:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2024-11-19 09:38:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:10,863 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2024-11-19 09:38:10,863 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-19 09:38:10,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 281 events. 64/281 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1180 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 494. Up to 158 conditions per place. [2024-11-19 09:38:10,864 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 32 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-19 09:38:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 335 flow [2024-11-19 09:38:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:38:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:38:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2024-11-19 09:38:10,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979973297730307 [2024-11-19 09:38:10,869 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 245 flow. Second operand 7 states and 373 transitions. [2024-11-19 09:38:10,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 335 flow [2024-11-19 09:38:10,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 299 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:38:10,875 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 235 flow [2024-11-19 09:38:10,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-19 09:38:10,876 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2024-11-19 09:38:10,876 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 235 flow [2024-11-19 09:38:10,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:10,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:10,877 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:10,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:38:10,877 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:10,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1124829933, now seen corresponding path program 1 times [2024-11-19 09:38:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120868080] [2024-11-19 09:38:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:11,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:11,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120868080] [2024-11-19 09:38:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120868080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:11,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:38:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678827436] [2024-11-19 09:38:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:11,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:11,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 107 [2024-11-19 09:38:11,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:11,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 107 [2024-11-19 09:38:11,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:11,374 INFO L124 PetriNetUnfolderBase]: 64/279 cut-off events. [2024-11-19 09:38:11,374 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:38:11,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 279 events. 64/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 63 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 487. Up to 158 conditions per place. [2024-11-19 09:38:11,379 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 30 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2024-11-19 09:38:11,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 323 flow [2024-11-19 09:38:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:38:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:38:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-19 09:38:11,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6186915887850467 [2024-11-19 09:38:11,381 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 235 flow. Second operand 5 states and 331 transitions. [2024-11-19 09:38:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 323 flow [2024-11-19 09:38:11,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 293 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:38:11,382 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 233 flow [2024-11-19 09:38:11,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2024-11-19 09:38:11,383 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-11-19 09:38:11,383 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 233 flow [2024-11-19 09:38:11,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:11,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:11,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:38:11,385 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:11,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1124829932, now seen corresponding path program 1 times [2024-11-19 09:38:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:11,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528801900] [2024-11-19 09:38:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:11,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:11,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528801900] [2024-11-19 09:38:11,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528801900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:38:11,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:38:11,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:38:11,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408991405] [2024-11-19 09:38:11,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:38:11,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:38:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:38:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:38:11,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-11-19 09:38:11,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:11,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-11-19 09:38:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:11,853 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2024-11-19 09:38:11,853 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-19 09:38:11,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 277 events. 64/277 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1161 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 479. Up to 158 conditions per place. [2024-11-19 09:38:11,854 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 26 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-11-19 09:38:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 313 flow [2024-11-19 09:38:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:38:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:38:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2024-11-19 09:38:11,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6485981308411215 [2024-11-19 09:38:11,856 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 233 flow. Second operand 5 states and 347 transitions. [2024-11-19 09:38:11,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 313 flow [2024-11-19 09:38:11,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 283 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:38:11,857 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 231 flow [2024-11-19 09:38:11,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2024-11-19 09:38:11,858 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2024-11-19 09:38:11,858 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 231 flow [2024-11-19 09:38:11,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:11,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:11,859 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:38:11,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:38:11,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:11,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1778571907, now seen corresponding path program 1 times [2024-11-19 09:38:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789082956] [2024-11-19 09:38:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:12,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:12,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789082956] [2024-11-19 09:38:12,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789082956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:12,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795896848] [2024-11-19 09:38:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:12,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:12,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:12,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:12,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:38:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:12,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:38:12,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:12,416 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 14 treesize of output 9 [2024-11-19 09:38:12,484 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:12,484 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 14 treesize of output 13 [2024-11-19 09:38:12,503 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:12,504 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 [2024-11-19 09:38:12,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:12,613 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 14 treesize of output 9 [2024-11-19 09:38:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:12,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:12,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:12,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:12,866 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:12,867 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 13 treesize of output 12 [2024-11-19 09:38:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:12,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795896848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:12,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2024-11-19 09:38:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103858873] [2024-11-19 09:38:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:12,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:38:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:38:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:38:15,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2024-11-19 09:38:15,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 231 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:15,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:15,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2024-11-19 09:38:15,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:15,436 INFO L124 PetriNetUnfolderBase]: 75/332 cut-off events. [2024-11-19 09:38:15,436 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-19 09:38:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 332 events. 75/332 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1455 event pairs, 72 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 602. Up to 178 conditions per place. [2024-11-19 09:38:15,437 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 46 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-11-19 09:38:15,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 459 flow [2024-11-19 09:38:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:38:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:38:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2024-11-19 09:38:15,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5950155763239875 [2024-11-19 09:38:15,439 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 231 flow. Second operand 9 states and 573 transitions. [2024-11-19 09:38:15,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 459 flow [2024-11-19 09:38:15,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:38:15,442 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 305 flow [2024-11-19 09:38:15,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-11-19 09:38:15,443 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -14 predicate places. [2024-11-19 09:38:15,444 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 305 flow [2024-11-19 09:38:15,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:15,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:15,445 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-19 09:38:15,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:38:15,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:15,646 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:15,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -973661121, now seen corresponding path program 1 times [2024-11-19 09:38:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:15,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727274526] [2024-11-19 09:38:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727274526] [2024-11-19 09:38:15,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727274526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622673853] [2024-11-19 09:38:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:38:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:15,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:38:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:38:16,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:38:16,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:16,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:16,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622673853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:16,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:16,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 09:38:16,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440994646] [2024-11-19 09:38:16,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:16,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:38:16,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:38:16,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:38:16,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-11-19 09:38:16,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:16,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:16,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-11-19 09:38:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:16,256 INFO L124 PetriNetUnfolderBase]: 64/318 cut-off events. [2024-11-19 09:38:16,256 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-19 09:38:16,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 318 events. 64/318 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1129 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 603. Up to 154 conditions per place. [2024-11-19 09:38:16,258 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 62 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-11-19 09:38:16,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 541 flow [2024-11-19 09:38:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:38:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:38:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 658 transitions. [2024-11-19 09:38:16,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7686915887850467 [2024-11-19 09:38:16,260 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 305 flow. Second operand 8 states and 658 transitions. [2024-11-19 09:38:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 541 flow [2024-11-19 09:38:16,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 521 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:38:16,262 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 321 flow [2024-11-19 09:38:16,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-11-19 09:38:16,263 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -6 predicate places. [2024-11-19 09:38:16,263 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 321 flow [2024-11-19 09:38:16,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:16,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:16,264 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-19 09:38:16,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:38:16,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 09:38:16,465 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:16,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2049655832, now seen corresponding path program 2 times [2024-11-19 09:38:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520528864] [2024-11-19 09:38:16,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:16,574 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:16,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:18,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:18,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520528864] [2024-11-19 09:38:18,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520528864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:18,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119147542] [2024-11-19 09:38:18,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:18,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:18,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:18,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:38:18,856 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:18,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:18,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-19 09:38:18,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:18,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:18,905 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 14 treesize of output 9 [2024-11-19 09:38:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:18,952 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 14 treesize of output 9 [2024-11-19 09:38:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:19,032 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 14 treesize of output 9 [2024-11-19 09:38:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:19,093 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 14 treesize of output 9 [2024-11-19 09:38:19,166 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:19,166 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 14 treesize of output 13 [2024-11-19 09:38:19,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:19,177 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 [2024-11-19 09:38:19,254 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:19,254 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 [2024-11-19 09:38:19,258 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 14 treesize of output 9 [2024-11-19 09:38:19,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:38:19,437 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:19,437 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 [2024-11-19 09:38:19,444 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 14 treesize of output 9 [2024-11-19 09:38:19,532 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:38:19,532 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 14 treesize of output 13 [2024-11-19 09:38:19,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-19 09:38:19,550 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:38:19,550 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 [2024-11-19 09:38:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:38:19,724 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 14 treesize of output 9 [2024-11-19 09:38:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:19,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:19,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:19,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:20,068 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:20,069 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 13 treesize of output 12 [2024-11-19 09:38:20,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:20,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:20,355 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:20,356 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 13 treesize of output 12 [2024-11-19 09:38:20,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:20,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:20,602 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:20,603 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 13 treesize of output 12 [2024-11-19 09:38:20,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:38:20,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-19 09:38:20,848 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:38:20,849 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 13 treesize of output 12 [2024-11-19 09:38:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119147542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:20,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:20,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 10] total 49 [2024-11-19 09:38:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598133528] [2024-11-19 09:38:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:20,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-19 09:38:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-19 09:38:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2209, Unknown=0, NotChecked=0, Total=2550 [2024-11-19 09:38:34,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2024-11-19 09:38:34,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 321 flow. Second operand has 51 states, 51 states have (on average 51.64705882352941) internal successors, (2634), 51 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:34,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:34,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2024-11-19 09:38:34,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:36,694 INFO L124 PetriNetUnfolderBase]: 77/394 cut-off events. [2024-11-19 09:38:36,694 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-11-19 09:38:36,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 394 events. 77/394 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1527 event pairs, 72 based on Foata normal form. 6/348 useless extension candidates. Maximal degree in co-relation 856. Up to 185 conditions per place. [2024-11-19 09:38:36,697 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 109 selfloop transitions, 32 changer transitions 0/173 dead transitions. [2024-11-19 09:38:36,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 993 flow [2024-11-19 09:38:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 09:38:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 09:38:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1274 transitions. [2024-11-19 09:38:36,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5176757415684681 [2024-11-19 09:38:36,700 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 321 flow. Second operand 23 states and 1274 transitions. [2024-11-19 09:38:36,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 993 flow [2024-11-19 09:38:36,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 173 transitions, 977 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 09:38:36,704 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 621 flow [2024-11-19 09:38:36,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=621, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2024-11-19 09:38:36,705 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, 25 predicate places. [2024-11-19 09:38:36,705 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 621 flow [2024-11-19 09:38:36,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 51.64705882352941) internal successors, (2634), 51 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:36,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:36,706 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-19 09:38:36,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:38:36,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:36,908 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:36,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1713972899, now seen corresponding path program 2 times [2024-11-19 09:38:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:36,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441083543] [2024-11-19 09:38:36,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:36,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:37,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:37,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441083543] [2024-11-19 09:38:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441083543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782179494] [2024-11-19 09:38:37,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:38:37,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:37,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:37,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:37,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:38:37,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:38:37,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:37,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:38:37,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:38:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:37,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:38:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:37,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782179494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:38:37,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:38:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-19 09:38:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247477546] [2024-11-19 09:38:37,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:38:37,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:38:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:38:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:38:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:38:37,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-11-19 09:38:37,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 621 flow. Second operand has 13 states, 13 states have (on average 78.84615384615384) internal successors, (1025), 13 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:37,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:38:37,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-11-19 09:38:37,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:38:38,166 INFO L124 PetriNetUnfolderBase]: 64/360 cut-off events. [2024-11-19 09:38:38,166 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2024-11-19 09:38:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 360 events. 64/360 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1130 event pairs, 63 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 833. Up to 154 conditions per place. [2024-11-19 09:38:38,168 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 87 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-11-19 09:38:38,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 140 transitions, 975 flow [2024-11-19 09:38:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:38:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:38:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 978 transitions. [2024-11-19 09:38:38,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7616822429906542 [2024-11-19 09:38:38,170 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 621 flow. Second operand 12 states and 978 transitions. [2024-11-19 09:38:38,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 140 transitions, 975 flow [2024-11-19 09:38:38,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 140 transitions, 865 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-11-19 09:38:38,174 INFO L231 Difference]: Finished difference. Result has 138 places, 107 transitions, 499 flow [2024-11-19 09:38:38,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=138, PETRI_TRANSITIONS=107} [2024-11-19 09:38:38,175 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, 29 predicate places. [2024-11-19 09:38:38,175 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 107 transitions, 499 flow [2024-11-19 09:38:38,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.84615384615384) internal successors, (1025), 13 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:38:38,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:38:38,176 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-19 09:38:38,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:38:38,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:38,377 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-19 09:38:38,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:38:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1667616514, now seen corresponding path program 3 times [2024-11-19 09:38:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:38:38,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447298012] [2024-11-19 09:38:38,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:38:38,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:38:38,990 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-19 09:38:38,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:38:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:38:39,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:38:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447298012] [2024-11-19 09:38:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447298012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:38:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042208754] [2024-11-19 09:38:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:38:39,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:38:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:38:39,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:38:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process