./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-deref.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 e8cd6f4fedd4ae62debc23b5e2621fa19163a924ac1cc7b32aeb6e38c2fa5ce1 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:16:03,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:16:03,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:16:03,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:16:03,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:16:03,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:16:03,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:16:03,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:16:03,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:16:03,242 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:16:03,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:16:03,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:16:03,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:16:03,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:16:03,245 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:16:03,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:16:03,245 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:16:03,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:16:03,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:16:03,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:16:03,247 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:16:03,249 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:16:03,250 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:16:03,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:16:03,250 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:16:03,251 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:16:03,251 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:16:03,251 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:16:03,251 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:16:03,252 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:16:03,252 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:16:03,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:16:03,253 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:16:03,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:16:03,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:16:03,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:16:03,254 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:16:03,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:16:03,255 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:16:03,255 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:16:03,255 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:16:03,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:16:03,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8cd6f4fedd4ae62debc23b5e2621fa19163a924ac1cc7b32aeb6e38c2fa5ce1 [2024-11-12 16:16:03,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:16:03,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:16:03,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:16:03,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:16:03,542 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:16:03,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i [2024-11-12 16:16:05,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:16:05,335 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:16:05,335 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i [2024-11-12 16:16:05,362 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1a24155b/4be1ec88fd59420bb9534f805db61034/FLAG102794e21 [2024-11-12 16:16:05,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1a24155b/4be1ec88fd59420bb9534f805db61034 [2024-11-12 16:16:05,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:16:05,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:16:05,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:16:05,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:16:05,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:16:05,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:16:05" (1/1) ... [2024-11-12 16:16:05,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4d01aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:05, skipping insertion in model container [2024-11-12 16:16:05,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:16:05" (1/1) ... [2024-11-12 16:16:05,682 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:16:06,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:16:06,320 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:16:06,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:16:06,462 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:16:06,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06 WrapperNode [2024-11-12 16:16:06,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:16:06,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:16:06,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:16:06,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:16:06,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,531 INFO L138 Inliner]: procedures = 372, calls = 100, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 260 [2024-11-12 16:16:06,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:16:06,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:16:06,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:16:06,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:16:06,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,609 INFO L175 MemorySlicer]: Split 99 memory accesses to 3 slices as follows [50, 18, 31]. 51 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 26 writes are split as follows [0, 2, 24]. [2024-11-12 16:16:06,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,614 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,639 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:16:06,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:16:06,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:16:06,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:16:06,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (1/1) ... [2024-11-12 16:16:06,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:16:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:06,762 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) [2024-11-12 16:16:06,766 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 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:16:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-12 16:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:16:06,818 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:16:06,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:16:06,822 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:16:06,992 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:16:06,994 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:16:07,689 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:16:07,689 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:16:08,134 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:16:08,134 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-12 16:16:08,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:16:08 BoogieIcfgContainer [2024-11-12 16:16:08,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:16:08,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:16:08,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:16:08,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:16:08,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:16:05" (1/3) ... [2024-11-12 16:16:08,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3d496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:16:08, skipping insertion in model container [2024-11-12 16:16:08,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:06" (2/3) ... [2024-11-12 16:16:08,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3d496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:16:08, skipping insertion in model container [2024-11-12 16:16:08,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:16:08" (3/3) ... [2024-11-12 16:16:08,143 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr-deref.i [2024-11-12 16:16:08,161 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:16:08,161 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2024-11-12 16:16:08,162 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:16:08,265 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:16:08,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 134 transitions, 272 flow [2024-11-12 16:16:08,364 INFO L124 PetriNetUnfolderBase]: 1/133 cut-off events. [2024-11-12 16:16:08,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:08,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 133 events. 1/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 269 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2024-11-12 16:16:08,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 134 transitions, 272 flow [2024-11-12 16:16:08,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 133 transitions, 269 flow [2024-11-12 16:16:08,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:16:08,393 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;@403794fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:16:08,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2024-11-12 16:16:08,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:16:08,398 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:16:08,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:08,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:08,399 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:16:08,399 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:08,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 759128, now seen corresponding path program 1 times [2024-11-12 16:16:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:08,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12315717] [2024-11-12 16:16:08,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:08,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12315717] [2024-11-12 16:16:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12315717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:08,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:16:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300206313] [2024-11-12 16:16:08,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:08,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:16:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:16:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:16:08,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 134 [2024-11-12 16:16:08,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2024-11-12 16:16:08,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:08,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 134 [2024-11-12 16:16:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:09,023 INFO L124 PetriNetUnfolderBase]: 64/329 cut-off events. [2024-11-12 16:16:09,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:09,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 329 events. 64/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1306 event pairs, 63 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2024-11-12 16:16:09,028 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 39 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-11-12 16:16:09,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 134 transitions, 353 flow [2024-11-12 16:16:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2024-11-12 16:16:09,044 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2024-11-12 16:16:09,047 INFO L175 Difference]: Start difference. First operand has 136 places, 133 transitions, 269 flow. Second operand 3 states and 324 transitions. [2024-11-12 16:16:09,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 134 transitions, 353 flow [2024-11-12 16:16:09,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 134 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:09,056 INFO L231 Difference]: Finished difference. Result has 138 places, 134 transitions, 280 flow [2024-11-12 16:16:09,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=138, PETRI_TRANSITIONS=134} [2024-11-12 16:16:09,062 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, 2 predicate places. [2024-11-12 16:16:09,063 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 134 transitions, 280 flow [2024-11-12 16:16:09,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2024-11-12 16:16:09,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:09,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:16:09,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:16:09,064 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:09,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash 23529062, now seen corresponding path program 1 times [2024-11-12 16:16:09,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:09,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808244545] [2024-11-12 16:16:09,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:09,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808244545] [2024-11-12 16:16:09,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808244545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603782329] [2024-11-12 16:16:09,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:09,220 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) [2024-11-12 16:16:09,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:16:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:09,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-12 16:16:09,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:09,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603782329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:09,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:09,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 16:16:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852825140] [2024-11-12 16:16:09,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:09,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:09,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:09,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 134 [2024-11-12 16:16:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 134 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 95.14285714285714) internal successors, (666), 7 states have internal predecessors, (666), 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) [2024-11-12 16:16:09,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:09,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 134 [2024-11-12 16:16:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:09,685 INFO L124 PetriNetUnfolderBase]: 64/332 cut-off events. [2024-11-12 16:16:09,686 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:09,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 332 events. 64/332 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1303 event pairs, 63 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 505. Up to 167 conditions per place. [2024-11-12 16:16:09,690 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 39 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2024-11-12 16:16:09,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 380 flow [2024-11-12 16:16:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:16:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:16:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 611 transitions. [2024-11-12 16:16:09,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7599502487562189 [2024-11-12 16:16:09,696 INFO L175 Difference]: Start difference. First operand has 138 places, 134 transitions, 280 flow. Second operand 6 states and 611 transitions. [2024-11-12 16:16:09,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 380 flow [2024-11-12 16:16:09,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 137 transitions, 376 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:09,700 INFO L231 Difference]: Finished difference. Result has 145 places, 137 transitions, 312 flow [2024-11-12 16:16:09,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2024-11-12 16:16:09,701 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, 9 predicate places. [2024-11-12 16:16:09,701 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 312 flow [2024-11-12 16:16:09,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.14285714285714) internal successors, (666), 7 states have internal predecessors, (666), 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) [2024-11-12 16:16:09,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:09,702 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2024-11-12 16:16:09,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:16:09,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:09,903 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:09,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 870738136, now seen corresponding path program 2 times [2024-11-12 16:16:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:09,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357928383] [2024-11-12 16:16:09,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:09,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:16:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357928383] [2024-11-12 16:16:10,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357928383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:10,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:10,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:16:10,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350436281] [2024-11-12 16:16:10,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:10,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:16:10,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:16:10,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:16:10,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 134 [2024-11-12 16:16:10,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2024-11-12 16:16:10,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:10,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 134 [2024-11-12 16:16:10,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:10,291 INFO L124 PetriNetUnfolderBase]: 64/320 cut-off events. [2024-11-12 16:16:10,292 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:16:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 320 events. 64/320 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1245 event pairs, 63 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 490. Up to 165 conditions per place. [2024-11-12 16:16:10,297 INFO L140 encePairwiseOnDemand]: 110/134 looper letters, 38 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-11-12 16:16:10,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 125 transitions, 388 flow [2024-11-12 16:16:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2024-11-12 16:16:10,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7114427860696517 [2024-11-12 16:16:10,302 INFO L175 Difference]: Start difference. First operand has 145 places, 137 transitions, 312 flow. Second operand 3 states and 286 transitions. [2024-11-12 16:16:10,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 125 transitions, 388 flow [2024-11-12 16:16:10,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 125 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:10,306 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 298 flow [2024-11-12 16:16:10,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-12 16:16:10,307 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -2 predicate places. [2024-11-12 16:16:10,308 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 298 flow [2024-11-12 16:16:10,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2024-11-12 16:16:10,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:10,308 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2024-11-12 16:16:10,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:16:10,309 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:10,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 870738137, now seen corresponding path program 1 times [2024-11-12 16:16:10,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:10,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925893955] [2024-11-12 16:16:10,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:10,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:10,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925893955] [2024-11-12 16:16:10,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925893955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:10,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691517303] [2024-11-12 16:16:10,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:10,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:10,447 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) [2024-11-12 16:16:10,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:16:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:10,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:16:10,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:10,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:10,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691517303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:10,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:10,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-12 16:16:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968432823] [2024-11-12 16:16:10,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:10,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:16:10,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:16:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:16:10,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 134 [2024-11-12 16:16:10,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 298 flow. Second operand has 13 states, 13 states have (on average 95.07692307692308) internal successors, (1236), 13 states have internal predecessors, (1236), 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) [2024-11-12 16:16:10,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:10,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 134 [2024-11-12 16:16:10,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:10,814 INFO L124 PetriNetUnfolderBase]: 64/326 cut-off events. [2024-11-12 16:16:10,815 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-12 16:16:10,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 326 events. 64/326 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1242 event pairs, 63 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 496. Up to 167 conditions per place. [2024-11-12 16:16:10,817 INFO L140 encePairwiseOnDemand]: 131/134 looper letters, 39 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2024-11-12 16:16:10,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 131 transitions, 434 flow [2024-11-12 16:16:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:16:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:16:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1184 transitions. [2024-11-12 16:16:10,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.736318407960199 [2024-11-12 16:16:10,821 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 298 flow. Second operand 12 states and 1184 transitions. [2024-11-12 16:16:10,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 131 transitions, 434 flow [2024-11-12 16:16:10,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 131 transitions, 410 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:16:10,826 INFO L231 Difference]: Finished difference. Result has 149 places, 131 transitions, 358 flow [2024-11-12 16:16:10,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=358, PETRI_PLACES=149, PETRI_TRANSITIONS=131} [2024-11-12 16:16:10,827 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, 13 predicate places. [2024-11-12 16:16:10,827 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 131 transitions, 358 flow [2024-11-12 16:16:10,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.07692307692308) internal successors, (1236), 13 states have internal predecessors, (1236), 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) [2024-11-12 16:16:10,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:10,829 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2024-11-12 16:16:10,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 16:16:11,032 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,SelfDestructingSolverStorable3 [2024-11-12 16:16:11,033 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:11,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:11,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1916526105, now seen corresponding path program 2 times [2024-11-12 16:16:11,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:11,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929090364] [2024-11-12 16:16:11,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:11,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:11,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929090364] [2024-11-12 16:16:11,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929090364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:11,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:11,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:16:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194145208] [2024-11-12 16:16:11,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:11,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:16:11,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:11,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:16:11,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:16:11,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 134 [2024-11-12 16:16:11,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 131 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2024-11-12 16:16:11,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:11,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 134 [2024-11-12 16:16:11,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:11,440 INFO L124 PetriNetUnfolderBase]: 64/314 cut-off events. [2024-11-12 16:16:11,441 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-12 16:16:11,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 314 events. 64/314 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1211 event pairs, 63 based on Foata normal form. 6/248 useless extension candidates. Maximal degree in co-relation 478. Up to 171 conditions per place. [2024-11-12 16:16:11,445 INFO L140 encePairwiseOnDemand]: 110/134 looper letters, 38 selfloop transitions, 12 changer transitions 0/119 dead transitions. [2024-11-12 16:16:11,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 119 transitions, 434 flow [2024-11-12 16:16:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2024-11-12 16:16:11,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7412935323383084 [2024-11-12 16:16:11,447 INFO L175 Difference]: Start difference. First operand has 149 places, 131 transitions, 358 flow. Second operand 3 states and 298 transitions. [2024-11-12 16:16:11,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 119 transitions, 434 flow [2024-11-12 16:16:11,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 119 transitions, 386 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-12 16:16:11,455 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 310 flow [2024-11-12 16:16:11,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=134, PETRI_TRANSITIONS=119} [2024-11-12 16:16:11,456 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -2 predicate places. [2024-11-12 16:16:11,457 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 310 flow [2024-11-12 16:16:11,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2024-11-12 16:16:11,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:11,458 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-12 16:16:11,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:16:11,459 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:11,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash -759359403, now seen corresponding path program 1 times [2024-11-12 16:16:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744086848] [2024-11-12 16:16:11,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744086848] [2024-11-12 16:16:11,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744086848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:11,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:11,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:11,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441013481] [2024-11-12 16:16:11,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:11,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:16:11,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:16:11,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:16:12,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 134 [2024-11-12 16:16:12,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 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) [2024-11-12 16:16:12,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:12,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 134 [2024-11-12 16:16:12,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:12,165 INFO L124 PetriNetUnfolderBase]: 73/332 cut-off events. [2024-11-12 16:16:12,165 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-12 16:16:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 332 events. 73/332 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1334 event pairs, 72 based on Foata normal form. 2/270 useless extension candidates. Maximal degree in co-relation 533. Up to 201 conditions per place. [2024-11-12 16:16:12,167 INFO L140 encePairwiseOnDemand]: 125/134 looper letters, 56 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2024-11-12 16:16:12,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 111 transitions, 408 flow [2024-11-12 16:16:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2024-11-12 16:16:12,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7263681592039801 [2024-11-12 16:16:12,169 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 310 flow. Second operand 3 states and 292 transitions. [2024-11-12 16:16:12,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 111 transitions, 408 flow [2024-11-12 16:16:12,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 111 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:16:12,173 INFO L231 Difference]: Finished difference. Result has 126 places, 111 transitions, 272 flow [2024-11-12 16:16:12,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=126, PETRI_TRANSITIONS=111} [2024-11-12 16:16:12,174 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -10 predicate places. [2024-11-12 16:16:12,174 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 111 transitions, 272 flow [2024-11-12 16:16:12,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 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) [2024-11-12 16:16:12,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:12,175 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-12 16:16:12,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:16:12,176 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:12,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -759359402, now seen corresponding path program 1 times [2024-11-12 16:16:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:12,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291692180] [2024-11-12 16:16:12,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:12,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291692180] [2024-11-12 16:16:12,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291692180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:12,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:12,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:16:12,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789890749] [2024-11-12 16:16:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:12,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:12,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 134 [2024-11-12 16:16:12,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 111 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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) [2024-11-12 16:16:12,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:12,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 134 [2024-11-12 16:16:12,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:13,053 INFO L124 PetriNetUnfolderBase]: 73/327 cut-off events. [2024-11-12 16:16:13,054 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-12 16:16:13,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 327 events. 73/327 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1319 event pairs, 63 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 544. Up to 158 conditions per place. [2024-11-12 16:16:13,056 INFO L140 encePairwiseOnDemand]: 116/134 looper letters, 43 selfloop transitions, 14 changer transitions 3/116 dead transitions. [2024-11-12 16:16:13,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 116 transitions, 402 flow [2024-11-12 16:16:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 459 transitions. [2024-11-12 16:16:13,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6850746268656717 [2024-11-12 16:16:13,059 INFO L175 Difference]: Start difference. First operand has 126 places, 111 transitions, 272 flow. Second operand 5 states and 459 transitions. [2024-11-12 16:16:13,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 116 transitions, 402 flow [2024-11-12 16:16:13,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 116 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:13,063 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 291 flow [2024-11-12 16:16:13,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2024-11-12 16:16:13,065 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -11 predicate places. [2024-11-12 16:16:13,065 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 291 flow [2024-11-12 16:16:13,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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) [2024-11-12 16:16:13,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:13,066 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:13,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:16:13,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:13,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2070751224, now seen corresponding path program 1 times [2024-11-12 16:16:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:13,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660166123] [2024-11-12 16:16:13,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660166123] [2024-11-12 16:16:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660166123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:13,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:13,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002534974] [2024-11-12 16:16:13,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:13,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:13,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 134 [2024-11-12 16:16:13,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 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) [2024-11-12 16:16:13,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:13,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 134 [2024-11-12 16:16:13,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:14,240 INFO L124 PetriNetUnfolderBase]: 64/292 cut-off events. [2024-11-12 16:16:14,241 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-12 16:16:14,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 292 events. 64/292 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1115 event pairs, 63 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 525. Up to 166 conditions per place. [2024-11-12 16:16:14,243 INFO L140 encePairwiseOnDemand]: 112/134 looper letters, 46 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-11-12 16:16:14,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 102 transitions, 407 flow [2024-11-12 16:16:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:16:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:16:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 570 transitions. [2024-11-12 16:16:14,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5317164179104478 [2024-11-12 16:16:14,245 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 291 flow. Second operand 8 states and 570 transitions. [2024-11-12 16:16:14,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 102 transitions, 407 flow [2024-11-12 16:16:14,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 102 transitions, 379 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:14,249 INFO L231 Difference]: Finished difference. Result has 123 places, 102 transitions, 287 flow [2024-11-12 16:16:14,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=287, PETRI_PLACES=123, PETRI_TRANSITIONS=102} [2024-11-12 16:16:14,250 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -13 predicate places. [2024-11-12 16:16:14,250 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 102 transitions, 287 flow [2024-11-12 16:16:14,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 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) [2024-11-12 16:16:14,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:14,251 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:14,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:16:14,251 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:14,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2070751223, now seen corresponding path program 1 times [2024-11-12 16:16:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497781035] [2024-11-12 16:16:14,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497781035] [2024-11-12 16:16:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497781035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:14,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:14,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:14,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639405081] [2024-11-12 16:16:14,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:14,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:14,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:15,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 134 [2024-11-12 16:16:15,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 102 transitions, 287 flow. Second operand has 7 states, 7 states have (on average 57.42857142857143) internal successors, (402), 7 states have internal predecessors, (402), 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) [2024-11-12 16:16:15,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:15,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 134 [2024-11-12 16:16:15,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:15,600 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-12 16:16:15,600 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-12 16:16:15,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 290 events. 64/290 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1130 event pairs, 63 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 517. Up to 172 conditions per place. [2024-11-12 16:16:15,603 INFO L140 encePairwiseOnDemand]: 119/134 looper letters, 49 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-11-12 16:16:15,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 100 transitions, 407 flow [2024-11-12 16:16:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:16:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:16:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 446 transitions. [2024-11-12 16:16:15,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47547974413646055 [2024-11-12 16:16:15,605 INFO L175 Difference]: Start difference. First operand has 123 places, 102 transitions, 287 flow. Second operand 7 states and 446 transitions. [2024-11-12 16:16:15,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 100 transitions, 407 flow [2024-11-12 16:16:15,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 100 transitions, 373 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:16:15,608 INFO L231 Difference]: Finished difference. Result has 120 places, 100 transitions, 275 flow [2024-11-12 16:16:15,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=120, PETRI_TRANSITIONS=100} [2024-11-12 16:16:15,609 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -16 predicate places. [2024-11-12 16:16:15,609 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 100 transitions, 275 flow [2024-11-12 16:16:15,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.42857142857143) internal successors, (402), 7 states have internal predecessors, (402), 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) [2024-11-12 16:16:15,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:15,610 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:15,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:16:15,610 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:15,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1422042280, now seen corresponding path program 1 times [2024-11-12 16:16:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:15,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634137534] [2024-11-12 16:16:15,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:15,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634137534] [2024-11-12 16:16:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634137534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:15,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:15,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177510591] [2024-11-12 16:16:15,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:15,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:16,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 134 [2024-11-12 16:16:16,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 100 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 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) [2024-11-12 16:16:16,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:16,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 134 [2024-11-12 16:16:16,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:16,304 INFO L124 PetriNetUnfolderBase]: 64/289 cut-off events. [2024-11-12 16:16:16,304 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-12 16:16:16,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 289 events. 64/289 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1117 event pairs, 63 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 503. Up to 171 conditions per place. [2024-11-12 16:16:16,306 INFO L140 encePairwiseOnDemand]: 120/134 looper letters, 40 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-11-12 16:16:16,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 99 transitions, 379 flow [2024-11-12 16:16:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 434 transitions. [2024-11-12 16:16:16,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6477611940298508 [2024-11-12 16:16:16,308 INFO L175 Difference]: Start difference. First operand has 120 places, 100 transitions, 275 flow. Second operand 5 states and 434 transitions. [2024-11-12 16:16:16,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 99 transitions, 379 flow [2024-11-12 16:16:16,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 99 transitions, 353 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:16:16,311 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 273 flow [2024-11-12 16:16:16,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2024-11-12 16:16:16,312 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -19 predicate places. [2024-11-12 16:16:16,312 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 273 flow [2024-11-12 16:16:16,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 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) [2024-11-12 16:16:16,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:16,313 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:16,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:16:16,313 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:16,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1422042281, now seen corresponding path program 1 times [2024-11-12 16:16:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594185273] [2024-11-12 16:16:16,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-12 16:16:16,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594185273] [2024-11-12 16:16:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594185273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:16,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594054807] [2024-11-12 16:16:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:16,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:16,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 134 [2024-11-12 16:16:16,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 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) [2024-11-12 16:16:16,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:16,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 134 [2024-11-12 16:16:16,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:16,811 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-11-12 16:16:16,811 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-12 16:16:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 288 events. 64/288 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1119 event pairs, 63 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 508. Up to 171 conditions per place. [2024-11-12 16:16:16,813 INFO L140 encePairwiseOnDemand]: 120/134 looper letters, 46 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2024-11-12 16:16:16,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 98 transitions, 389 flow [2024-11-12 16:16:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 410 transitions. [2024-11-12 16:16:16,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6119402985074627 [2024-11-12 16:16:16,815 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 273 flow. Second operand 5 states and 410 transitions. [2024-11-12 16:16:16,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 98 transitions, 389 flow [2024-11-12 16:16:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 98 transitions, 363 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:16,818 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 271 flow [2024-11-12 16:16:16,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-11-12 16:16:16,819 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -20 predicate places. [2024-11-12 16:16:16,819 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 271 flow [2024-11-12 16:16:16,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 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) [2024-11-12 16:16:16,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:16,820 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:16,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:16:16,820 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:16,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1496643655, now seen corresponding path program 1 times [2024-11-12 16:16:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328055699] [2024-11-12 16:16:16,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:17,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328055699] [2024-11-12 16:16:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328055699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:17,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:17,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149628355] [2024-11-12 16:16:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:17,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:16:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:16:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:16:17,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 134 [2024-11-12 16:16:17,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 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) [2024-11-12 16:16:17,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:17,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 134 [2024-11-12 16:16:17,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:17,756 INFO L124 PetriNetUnfolderBase]: 73/315 cut-off events. [2024-11-12 16:16:17,756 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-12 16:16:17,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 315 events. 73/315 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1305 event pairs, 63 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 545. Up to 164 conditions per place. [2024-11-12 16:16:17,758 INFO L140 encePairwiseOnDemand]: 128/134 looper letters, 54 selfloop transitions, 3 changer transitions 3/104 dead transitions. [2024-11-12 16:16:17,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 104 transitions, 403 flow [2024-11-12 16:16:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:16:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:16:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 381 transitions. [2024-11-12 16:16:17,760 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.710820895522388 [2024-11-12 16:16:17,760 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 271 flow. Second operand 4 states and 381 transitions. [2024-11-12 16:16:17,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 104 transitions, 403 flow [2024-11-12 16:16:17,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:17,763 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 245 flow [2024-11-12 16:16:17,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2024-11-12 16:16:17,765 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -24 predicate places. [2024-11-12 16:16:17,766 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 245 flow [2024-11-12 16:16:17,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 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) [2024-11-12 16:16:17,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:17,766 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:17,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:16:17,767 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:17,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1263746569, now seen corresponding path program 1 times [2024-11-12 16:16:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573472825] [2024-11-12 16:16:17,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-12 16:16:18,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:18,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573472825] [2024-11-12 16:16:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573472825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:18,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:18,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362578319] [2024-11-12 16:16:18,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:18,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:18,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 134 [2024-11-12 16:16:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 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) [2024-11-12 16:16:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:18,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 134 [2024-11-12 16:16:18,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:19,073 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2024-11-12 16:16:19,074 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-12 16:16:19,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 281 events. 64/281 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1105 event pairs, 54 based on Foata normal form. 2/237 useless extension candidates. Maximal degree in co-relation 498. Up to 132 conditions per place. [2024-11-12 16:16:19,075 INFO L140 encePairwiseOnDemand]: 114/134 looper letters, 48 selfloop transitions, 16 changer transitions 3/100 dead transitions. [2024-11-12 16:16:19,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 100 transitions, 389 flow [2024-11-12 16:16:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:16:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:16:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 453 transitions. [2024-11-12 16:16:19,077 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48294243070362475 [2024-11-12 16:16:19,077 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 245 flow. Second operand 7 states and 453 transitions. [2024-11-12 16:16:19,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 100 transitions, 389 flow [2024-11-12 16:16:19,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 100 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:16:19,080 INFO L231 Difference]: Finished difference. Result has 111 places, 91 transitions, 263 flow [2024-11-12 16:16:19,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2024-11-12 16:16:19,081 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -25 predicate places. [2024-11-12 16:16:19,081 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 263 flow [2024-11-12 16:16:19,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 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) [2024-11-12 16:16:19,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:19,082 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:19,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:16:19,082 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:19,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1263746568, now seen corresponding path program 1 times [2024-11-12 16:16:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:19,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126929869] [2024-11-12 16:16:19,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:19,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-12 16:16:19,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:19,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126929869] [2024-11-12 16:16:19,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126929869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:19,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:19,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:19,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764481163] [2024-11-12 16:16:19,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:19,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:19,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 134 [2024-11-12 16:16:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 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) [2024-11-12 16:16:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 134 [2024-11-12 16:16:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:20,171 INFO L124 PetriNetUnfolderBase]: 64/279 cut-off events. [2024-11-12 16:16:20,171 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-12 16:16:20,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 279 events. 64/279 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1090 event pairs, 54 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 513. Up to 130 conditions per place. [2024-11-12 16:16:20,176 INFO L140 encePairwiseOnDemand]: 114/134 looper letters, 49 selfloop transitions, 18 changer transitions 3/98 dead transitions. [2024-11-12 16:16:20,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 417 flow [2024-11-12 16:16:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:16:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:16:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 574 transitions. [2024-11-12 16:16:20,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5354477611940298 [2024-11-12 16:16:20,179 INFO L175 Difference]: Start difference. First operand has 111 places, 91 transitions, 263 flow. Second operand 8 states and 574 transitions. [2024-11-12 16:16:20,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 417 flow [2024-11-12 16:16:20,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 98 transitions, 385 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:16:20,182 INFO L231 Difference]: Finished difference. Result has 110 places, 89 transitions, 263 flow [2024-11-12 16:16:20,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=263, PETRI_PLACES=110, PETRI_TRANSITIONS=89} [2024-11-12 16:16:20,183 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -26 predicate places. [2024-11-12 16:16:20,183 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 89 transitions, 263 flow [2024-11-12 16:16:20,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 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) [2024-11-12 16:16:20,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:20,184 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:20,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 16:16:20,184 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:20,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1015266334, now seen corresponding path program 1 times [2024-11-12 16:16:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23280371] [2024-11-12 16:16:20,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-12 16:16:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23280371] [2024-11-12 16:16:20,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23280371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:20,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:20,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469506074] [2024-11-12 16:16:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:20,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:20,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 134 [2024-11-12 16:16:20,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 89 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2024-11-12 16:16:20,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:20,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 134 [2024-11-12 16:16:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:20,655 INFO L124 PetriNetUnfolderBase]: 64/278 cut-off events. [2024-11-12 16:16:20,655 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-12 16:16:20,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 278 events. 64/278 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1098 event pairs, 63 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 511. Up to 170 conditions per place. [2024-11-12 16:16:20,657 INFO L140 encePairwiseOnDemand]: 120/134 looper letters, 45 selfloop transitions, 13 changer transitions 0/88 dead transitions. [2024-11-12 16:16:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 88 transitions, 377 flow [2024-11-12 16:16:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 409 transitions. [2024-11-12 16:16:20,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6104477611940299 [2024-11-12 16:16:20,659 INFO L175 Difference]: Start difference. First operand has 110 places, 89 transitions, 263 flow. Second operand 5 states and 409 transitions. [2024-11-12 16:16:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 88 transitions, 377 flow [2024-11-12 16:16:20,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 88 transitions, 341 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:16:20,662 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 251 flow [2024-11-12 16:16:20,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2024-11-12 16:16:20,664 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -30 predicate places. [2024-11-12 16:16:20,664 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 251 flow [2024-11-12 16:16:20,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2024-11-12 16:16:20,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:20,664 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:20,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:16:20,665 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:20,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1015266333, now seen corresponding path program 1 times [2024-11-12 16:16:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:20,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321819000] [2024-11-12 16:16:20,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:16:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321819000] [2024-11-12 16:16:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321819000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:20,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:20,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:20,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163496887] [2024-11-12 16:16:20,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:20,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:20,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:21,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 134 [2024-11-12 16:16:21,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2024-11-12 16:16:21,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:21,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 134 [2024-11-12 16:16:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:21,358 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2024-11-12 16:16:21,358 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-12 16:16:21,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 277 events. 64/277 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1090 event pairs, 63 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 490. Up to 170 conditions per place. [2024-11-12 16:16:21,361 INFO L140 encePairwiseOnDemand]: 120/134 looper letters, 39 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-12 16:16:21,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 87 transitions, 353 flow [2024-11-12 16:16:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2024-11-12 16:16:21,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6462686567164179 [2024-11-12 16:16:21,364 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 251 flow. Second operand 5 states and 433 transitions. [2024-11-12 16:16:21,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 87 transitions, 353 flow [2024-11-12 16:16:21,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 87 transitions, 327 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:21,366 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 249 flow [2024-11-12 16:16:21,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2024-11-12 16:16:21,367 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -31 predicate places. [2024-11-12 16:16:21,367 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 249 flow [2024-11-12 16:16:21,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2024-11-12 16:16:21,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:21,368 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:21,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 16:16:21,368 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:16:21,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1670089695, now seen corresponding path program 1 times [2024-11-12 16:16:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:21,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192814494] [2024-11-12 16:16:21,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:23,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:23,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192814494] [2024-11-12 16:16:23,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192814494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:23,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039881334] [2024-11-12 16:16:23,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:23,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:23,333 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) [2024-11-12 16:16:23,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:16:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:23,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-12 16:16:23,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:23,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:16:23,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:16:23,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:16:23,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-12 16:16:23,666 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2024-11-12 16:16:23,666 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 19 treesize of output 19 [2024-11-12 16:16:23,673 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 22 treesize of output 17 [2024-11-12 16:16:23,835 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-11-12 16:16:23,836 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 20 treesize of output 22 [2024-11-12 16:16:23,860 INFO L349 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2024-11-12 16:16:23,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2024-11-12 16:16:24,022 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-12 16:16:24,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 38 [2024-11-12 16:16:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:24,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-12 16:16:24,050 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-12 16:16:24,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2024-11-12 16:16:24,088 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-12 16:16:24,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 26 [2024-11-12 16:16:24,499 INFO L349 Elim1Store]: treesize reduction 74, result has 58.4 percent of original size [2024-11-12 16:16:24,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 167 [2024-11-12 16:16:25,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:25,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 102 treesize of output 54 [2024-11-12 16:16:25,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:25,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 46 [2024-11-12 16:16:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:25,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:26,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:26,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 176 [2024-11-12 16:16:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:16:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039881334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:27,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:27,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 32 [2024-11-12 16:16:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937264575] [2024-11-12 16:16:27,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:27,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-12 16:16:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-12 16:16:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2024-11-12 16:17:03,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 134 [2024-11-12 16:17:03,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 249 flow. Second operand has 33 states, 33 states have (on average 46.121212121212125) internal successors, (1522), 33 states have internal predecessors, (1522), 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) [2024-11-12 16:17:03,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:03,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 134 [2024-11-12 16:17:03,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:05,000 INFO L124 PetriNetUnfolderBase]: 64/274 cut-off events. [2024-11-12 16:17:05,000 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-12 16:17:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 274 events. 64/274 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1087 event pairs, 54 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 495. Up to 128 conditions per place. [2024-11-12 16:17:05,002 INFO L140 encePairwiseOnDemand]: 113/134 looper letters, 48 selfloop transitions, 18 changer transitions 3/93 dead transitions. [2024-11-12 16:17:05,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 399 flow [2024-11-12 16:17:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:17:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:17:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 590 transitions. [2024-11-12 16:17:05,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36691542288557216 [2024-11-12 16:17:05,005 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 249 flow. Second operand 12 states and 590 transitions. [2024-11-12 16:17:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 399 flow [2024-11-12 16:17:05,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 93 transitions, 373 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:17:05,009 INFO L231 Difference]: Finished difference. Result has 109 places, 84 transitions, 253 flow [2024-11-12 16:17:05,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=109, PETRI_TRANSITIONS=84} [2024-11-12 16:17:05,010 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -27 predicate places. [2024-11-12 16:17:05,010 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 84 transitions, 253 flow [2024-11-12 16:17:05,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 46.121212121212125) internal successors, (1522), 33 states have internal predecessors, (1522), 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) [2024-11-12 16:17:05,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:05,012 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:05,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:17:05,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:17:05,213 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:05,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:05,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1361544926, now seen corresponding path program 1 times [2024-11-12 16:17:05,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:05,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869062318] [2024-11-12 16:17:05,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:05,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:05,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:05,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869062318] [2024-11-12 16:17:05,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869062318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:05,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:05,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:17:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859897930] [2024-11-12 16:17:05,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:05,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:17:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:17:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:17:05,692 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 134 [2024-11-12 16:17:05,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 84 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2024-11-12 16:17:05,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:05,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 134 [2024-11-12 16:17:05,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:05,883 INFO L124 PetriNetUnfolderBase]: 73/290 cut-off events. [2024-11-12 16:17:05,883 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-12 16:17:05,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 290 events. 73/290 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1179 event pairs, 45 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 540. Up to 108 conditions per place. [2024-11-12 16:17:05,885 INFO L140 encePairwiseOnDemand]: 114/134 looper letters, 48 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-12 16:17:05,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 91 transitions, 399 flow [2024-11-12 16:17:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:17:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:17:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2024-11-12 16:17:05,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6019900497512438 [2024-11-12 16:17:05,887 INFO L175 Difference]: Start difference. First operand has 109 places, 84 transitions, 253 flow. Second operand 6 states and 484 transitions. [2024-11-12 16:17:05,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 91 transitions, 399 flow [2024-11-12 16:17:05,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 91 transitions, 363 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-12 16:17:05,890 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 249 flow [2024-11-12 16:17:05,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2024-11-12 16:17:05,890 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -35 predicate places. [2024-11-12 16:17:05,891 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 249 flow [2024-11-12 16:17:05,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 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) [2024-11-12 16:17:05,891 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:05,891 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:05,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:17:05,891 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:05,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1361544925, now seen corresponding path program 1 times [2024-11-12 16:17:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:05,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366794229] [2024-11-12 16:17:05,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366794229] [2024-11-12 16:17:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366794229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:06,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:06,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:17:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353693102] [2024-11-12 16:17:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:06,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:17:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:17:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:17:06,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 134 [2024-11-12 16:17:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2024-11-12 16:17:06,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 134 [2024-11-12 16:17:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:06,628 INFO L124 PetriNetUnfolderBase]: 73/272 cut-off events. [2024-11-12 16:17:06,628 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-12 16:17:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 272 events. 73/272 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1064 event pairs, 18 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 534. Up to 135 conditions per place. [2024-11-12 16:17:06,630 INFO L140 encePairwiseOnDemand]: 116/134 looper letters, 44 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-11-12 16:17:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 383 flow [2024-11-12 16:17:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:17:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:17:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 514 transitions. [2024-11-12 16:17:06,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6393034825870647 [2024-11-12 16:17:06,632 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 249 flow. Second operand 6 states and 514 transitions. [2024-11-12 16:17:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 383 flow [2024-11-12 16:17:06,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 89 transitions, 347 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:17:06,635 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 241 flow [2024-11-12 16:17:06,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2024-11-12 16:17:06,636 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -37 predicate places. [2024-11-12 16:17:06,636 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 241 flow [2024-11-12 16:17:06,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2024-11-12 16:17:06,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:06,636 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:06,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-12 16:17:06,637 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:06,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1442040983, now seen corresponding path program 1 times [2024-11-12 16:17:06,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776398508] [2024-11-12 16:17:06,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:06,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776398508] [2024-11-12 16:17:06,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776398508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:06,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:06,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:17:06,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586316347] [2024-11-12 16:17:06,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:06,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:06,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:06,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:06,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 134 [2024-11-12 16:17:06,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2024-11-12 16:17:06,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:06,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 134 [2024-11-12 16:17:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:07,051 INFO L124 PetriNetUnfolderBase]: 64/273 cut-off events. [2024-11-12 16:17:07,051 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-12 16:17:07,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 273 events. 64/273 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1098 event pairs, 56 based on Foata normal form. 8/244 useless extension candidates. Maximal degree in co-relation 496. Up to 162 conditions per place. [2024-11-12 16:17:07,053 INFO L140 encePairwiseOnDemand]: 130/134 looper letters, 55 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2024-11-12 16:17:07,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 85 transitions, 367 flow [2024-11-12 16:17:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2024-11-12 16:17:07,055 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8084577114427861 [2024-11-12 16:17:07,055 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 241 flow. Second operand 3 states and 325 transitions. [2024-11-12 16:17:07,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 85 transitions, 367 flow [2024-11-12 16:17:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 333 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:17:07,057 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 209 flow [2024-11-12 16:17:07,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-11-12 16:17:07,058 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -42 predicate places. [2024-11-12 16:17:07,058 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 209 flow [2024-11-12 16:17:07,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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) [2024-11-12 16:17:07,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:07,059 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:07,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 16:17:07,059 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:07,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1442040984, now seen corresponding path program 1 times [2024-11-12 16:17:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:07,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356047849] [2024-11-12 16:17:07,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:07,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:07,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:07,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356047849] [2024-11-12 16:17:07,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356047849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:07,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:07,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:17:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605512393] [2024-11-12 16:17:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:07,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:17:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:17:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:17:07,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 134 [2024-11-12 16:17:07,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2024-11-12 16:17:07,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:07,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 134 [2024-11-12 16:17:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:07,452 INFO L124 PetriNetUnfolderBase]: 71/264 cut-off events. [2024-11-12 16:17:07,452 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-12 16:17:07,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 264 events. 71/264 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 979 event pairs, 56 based on Foata normal form. 8/243 useless extension candidates. Maximal degree in co-relation 493. Up to 162 conditions per place. [2024-11-12 16:17:07,454 INFO L140 encePairwiseOnDemand]: 130/134 looper letters, 56 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-11-12 16:17:07,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 335 flow [2024-11-12 16:17:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:17:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:17:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2024-11-12 16:17:07,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8034825870646766 [2024-11-12 16:17:07,455 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 209 flow. Second operand 3 states and 323 transitions. [2024-11-12 16:17:07,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 335 flow [2024-11-12 16:17:07,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:17:07,457 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 205 flow [2024-11-12 16:17:07,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-11-12 16:17:07,459 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -44 predicate places. [2024-11-12 16:17:07,459 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 205 flow [2024-11-12 16:17:07,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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) [2024-11-12 16:17:07,460 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:07,460 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:07,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-12 16:17:07,460 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:07,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1876744202, now seen corresponding path program 1 times [2024-11-12 16:17:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:07,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383249931] [2024-11-12 16:17:07,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:07,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:07,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383249931] [2024-11-12 16:17:07,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383249931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:07,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:07,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:17:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519138120] [2024-11-12 16:17:07,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:07,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:17:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:17:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:17:08,489 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 134 [2024-11-12 16:17:08,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 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) [2024-11-12 16:17:08,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:08,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 134 [2024-11-12 16:17:08,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:08,739 INFO L124 PetriNetUnfolderBase]: 85/312 cut-off events. [2024-11-12 16:17:08,739 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-12 16:17:08,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 312 events. 85/312 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1291 event pairs, 60 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 579. Up to 159 conditions per place. [2024-11-12 16:17:08,741 INFO L140 encePairwiseOnDemand]: 122/134 looper letters, 61 selfloop transitions, 11 changer transitions 3/95 dead transitions. [2024-11-12 16:17:08,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 95 transitions, 401 flow [2024-11-12 16:17:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:17:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:17:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 498 transitions. [2024-11-12 16:17:08,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6194029850746269 [2024-11-12 16:17:08,744 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 205 flow. Second operand 6 states and 498 transitions. [2024-11-12 16:17:08,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 95 transitions, 401 flow [2024-11-12 16:17:08,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 95 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:17:08,747 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 236 flow [2024-11-12 16:17:08,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-11-12 16:17:08,747 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -40 predicate places. [2024-11-12 16:17:08,748 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 236 flow [2024-11-12 16:17:08,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 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) [2024-11-12 16:17:08,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:08,748 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:08,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-12 16:17:08,748 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:08,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1876744203, now seen corresponding path program 1 times [2024-11-12 16:17:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:08,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129840664] [2024-11-12 16:17:08,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-12 16:17:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129840664] [2024-11-12 16:17:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129840664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:09,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:17:09,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:17:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636545697] [2024-11-12 16:17:09,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:09,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:17:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:17:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:17:09,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 134 [2024-11-12 16:17:09,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 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) [2024-11-12 16:17:09,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:09,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 134 [2024-11-12 16:17:09,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:09,569 INFO L124 PetriNetUnfolderBase]: 79/290 cut-off events. [2024-11-12 16:17:09,570 INFO L125 PetriNetUnfolderBase]: For 86/92 co-relation queries the response was YES. [2024-11-12 16:17:09,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 290 events. 79/290 cut-off events. For 86/92 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1141 event pairs, 54 based on Foata normal form. 17/276 useless extension candidates. Maximal degree in co-relation 589. Up to 139 conditions per place. [2024-11-12 16:17:09,572 INFO L140 encePairwiseOnDemand]: 123/134 looper letters, 60 selfloop transitions, 11 changer transitions 3/94 dead transitions. [2024-11-12 16:17:09,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 94 transitions, 418 flow [2024-11-12 16:17:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:17:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:17:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 544 transitions. [2024-11-12 16:17:09,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766169154228856 [2024-11-12 16:17:09,574 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 236 flow. Second operand 6 states and 544 transitions. [2024-11-12 16:17:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 94 transitions, 418 flow [2024-11-12 16:17:09,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 94 transitions, 399 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:17:09,577 INFO L231 Difference]: Finished difference. Result has 96 places, 77 transitions, 237 flow [2024-11-12 16:17:09,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2024-11-12 16:17:09,578 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -40 predicate places. [2024-11-12 16:17:09,578 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 237 flow [2024-11-12 16:17:09,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 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) [2024-11-12 16:17:09,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:09,579 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:09,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-12 16:17:09,579 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:09,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1950472676, now seen corresponding path program 1 times [2024-11-12 16:17:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605330538] [2024-11-12 16:17:09,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-12 16:17:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:17:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605330538] [2024-11-12 16:17:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605330538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:17:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828277463] [2024-11-12 16:17:13,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:13,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:17:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:17:13,332 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) [2024-11-12 16:17:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:17:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:17:13,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-12 16:17:13,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:17:13,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:17:13,800 INFO L349 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2024-11-12 16:17:13,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2024-11-12 16:17:13,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-12 16:17:13,901 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-12 16:17:13,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 33 [2024-11-12 16:17:13,920 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:17:13,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-12 16:17:14,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:17:14,104 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 62 treesize of output 88 [2024-11-12 16:17:14,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2024-11-12 16:17:14,513 INFO L349 Elim1Store]: treesize reduction 41, result has 37.9 percent of original size [2024-11-12 16:17:14,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 126 [2024-11-12 16:17:14,544 INFO L349 Elim1Store]: treesize reduction 128, result has 31.6 percent of original size [2024-11-12 16:17:14,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 68 [2024-11-12 16:17:14,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 21 [2024-11-12 16:17:14,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 121 treesize of output 96 [2024-11-12 16:17:14,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 121 treesize of output 96 [2024-11-12 16:17:14,928 INFO L349 Elim1Store]: treesize reduction 63, result has 37.0 percent of original size [2024-11-12 16:17:14,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 168 treesize of output 135 [2024-11-12 16:17:15,116 INFO L349 Elim1Store]: treesize reduction 53, result has 32.1 percent of original size [2024-11-12 16:17:15,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 132 [2024-11-12 16:17:15,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2024-11-12 16:17:15,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 46 [2024-11-12 16:17:15,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2024-11-12 16:17:15,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-12 16:17:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-12 16:17:15,466 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:17:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828277463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:17:15,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:17:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [26] total 44 [2024-11-12 16:17:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593502009] [2024-11-12 16:17:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:17:15,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:17:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:17:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:17:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1898, Unknown=0, NotChecked=0, Total=2070 [2024-11-12 16:17:19,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 134 [2024-11-12 16:17:19,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 237 flow. Second operand has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 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) [2024-11-12 16:17:19,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:17:19,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 134 [2024-11-12 16:17:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:17:21,023 INFO L124 PetriNetUnfolderBase]: 132/421 cut-off events. [2024-11-12 16:17:21,023 INFO L125 PetriNetUnfolderBase]: For 148/155 co-relation queries the response was YES. [2024-11-12 16:17:21,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 421 events. 132/421 cut-off events. For 148/155 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1937 event pairs, 6 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 877. Up to 68 conditions per place. [2024-11-12 16:17:21,026 INFO L140 encePairwiseOnDemand]: 112/134 looper letters, 86 selfloop transitions, 29 changer transitions 3/129 dead transitions. [2024-11-12 16:17:21,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 129 transitions, 597 flow [2024-11-12 16:17:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-12 16:17:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-12 16:17:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1428 transitions. [2024-11-12 16:17:21,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44402985074626866 [2024-11-12 16:17:21,030 INFO L175 Difference]: Start difference. First operand has 96 places, 77 transitions, 237 flow. Second operand 24 states and 1428 transitions. [2024-11-12 16:17:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 129 transitions, 597 flow [2024-11-12 16:17:21,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 129 transitions, 565 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:17:21,035 INFO L231 Difference]: Finished difference. Result has 115 places, 85 transitions, 302 flow [2024-11-12 16:17:21,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=302, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2024-11-12 16:17:21,036 INFO L279 CegarLoopForPetriNet]: 136 programPoint places, -21 predicate places. [2024-11-12 16:17:21,036 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 302 flow [2024-11-12 16:17:21,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 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) [2024-11-12 16:17:21,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:17:21,037 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:17:21,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:17:21,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:17:21,242 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2024-11-12 16:17:21,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:17:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1950472677, now seen corresponding path program 1 times [2024-11-12 16:17:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:17:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103416351] [2024-11-12 16:17:21,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:17:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:17:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat