./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.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_12-arraycollapse_rc.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 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:16:01,617 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:16:01,694 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:16:01,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:16:01,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:16:01,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:16:01,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:16:01,731 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:16:01,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:16:01,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:16:01,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:16:01,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:16:01,736 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:16:01,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:16:01,738 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:16:01,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:16:01,739 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:16:01,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:16:01,740 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:16:01,740 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:16:01,740 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:16:01,746 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:16:01,746 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:16:01,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:16:01,747 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:16:01,747 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:16:01,747 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:16:01,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:16:01,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:16:01,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:16:01,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:16:01,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:16:01,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:16:01,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:16:01,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:16:01,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:16:01,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:16:01,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:16:01,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:16:01,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:16:01,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:16:01,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:16:01,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2024-11-12 16:16:02,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:16:02,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:16:02,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:16:02,049 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:16:02,050 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:16:02,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-12 16:16:03,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:16:03,888 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:16:03,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-11-12 16:16:03,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39ae567d/4af6662d8e214745aa61754fb0c1235e/FLAG42bfd54d0 [2024-11-12 16:16:03,927 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39ae567d/4af6662d8e214745aa61754fb0c1235e [2024-11-12 16:16:03,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:16:03,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:16:03,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:16:03,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:16:03,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:16:03,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:16:03" (1/1) ... [2024-11-12 16:16:03,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f2cf76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:03, skipping insertion in model container [2024-11-12 16:16:03,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:16:03" (1/1) ... [2024-11-12 16:16:03,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:16:04,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:16:04,576 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:16:04,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:16:04,716 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:16:04,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04 WrapperNode [2024-11-12 16:16:04,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:16:04,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:16:04,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:16:04,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:16:04,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,785 INFO L138 Inliner]: procedures = 372, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 218 [2024-11-12 16:16:04,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:16:04,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:16:04,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:16:04,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:16:04,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,805 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,828 INFO L175 MemorySlicer]: Split 88 memory accesses to 3 slices as follows [50, 16, 22]. 57 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [50, 10, 0]. The 17 writes are split as follows [0, 1, 16]. [2024-11-12 16:16:04,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,829 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:16:04,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:16:04,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:16:04,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:16:04,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (1/1) ... [2024-11-12 16:16:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:16:04,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:04,889 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 16:16:04,891 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 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-12 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-12 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-12 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-12 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-12 16:16:04,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:16:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-12 16:16:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-12 16:16:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-12 16:16:04,938 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-12 16:16:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:16:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:16:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 16:16:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:16:04,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:16:04,940 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 16:16:05,087 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:16:05,090 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:16:05,593 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:16:05,593 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:16:06,063 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:16:06,063 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-12 16:16:06,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:16:06 BoogieIcfgContainer [2024-11-12 16:16:06,064 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:16:06,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:16:06,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:16:06,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:16:06,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:16:03" (1/3) ... [2024-11-12 16:16:06,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a9444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:16:06, skipping insertion in model container [2024-11-12 16:16:06,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:16:04" (2/3) ... [2024-11-12 16:16:06,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a9444c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:16:06, skipping insertion in model container [2024-11-12 16:16:06,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:16:06" (3/3) ... [2024-11-12 16:16:06,073 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2024-11-12 16:16:06,092 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:16:06,092 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-11-12 16:16:06,092 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:16:06,161 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-12 16:16:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 101 transitions, 206 flow [2024-11-12 16:16:06,275 INFO L124 PetriNetUnfolderBase]: 1/100 cut-off events. [2024-11-12 16:16:06,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:06,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 100 events. 1/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 324 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-12 16:16:06,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 101 transitions, 206 flow [2024-11-12 16:16:06,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 100 transitions, 203 flow [2024-11-12 16:16:06,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:16:06,307 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;@459d6182, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:16:06,308 INFO L334 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2024-11-12 16:16:06,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:16:06,314 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-12 16:16:06,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:06,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:06,316 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:16:06,316 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:06,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 625045, now seen corresponding path program 1 times [2024-11-12 16:16:06,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:06,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650753146] [2024-11-12 16:16:06,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:06,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:06,683 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 16:16:06,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650753146] [2024-11-12 16:16:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650753146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:06,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:06,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:16:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67786101] [2024-11-12 16:16:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:06,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:16:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:06,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:16:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:16:06,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-12 16:16:06,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 16:16:06,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:06,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-12 16:16:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:06,999 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-12 16:16:07,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:16:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 290 events. 64/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1348 event pairs, 63 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 377. Up to 157 conditions per place. [2024-11-12 16:16:07,009 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 30 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-11-12 16:16:07,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 263 flow [2024-11-12 16:16:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-11-12 16:16:07,023 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7227722772277227 [2024-11-12 16:16:07,026 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 203 flow. Second operand 3 states and 219 transitions. [2024-11-12 16:16:07,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 263 flow [2024-11-12 16:16:07,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:07,033 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 202 flow [2024-11-12 16:16:07,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2024-11-12 16:16:07,039 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2024-11-12 16:16:07,039 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 202 flow [2024-11-12 16:16:07,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 16:16:07,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:07,041 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:16:07,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:16:07,041 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash 625046, now seen corresponding path program 1 times [2024-11-12 16:16:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40969222] [2024-11-12 16:16:07,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:07,188 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 16:16:07,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:07,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40969222] [2024-11-12 16:16:07,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40969222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:07,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:07,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:16:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143386760] [2024-11-12 16:16:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:07,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:16:07,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:16:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:16:07,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-12 16:16:07,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 16:16:07,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:07,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-12 16:16:07,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:07,402 INFO L124 PetriNetUnfolderBase]: 64/284 cut-off events. [2024-11-12 16:16:07,402 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:16:07,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 284 events. 64/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1317 event pairs, 63 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 411. Up to 157 conditions per place. [2024-11-12 16:16:07,407 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 27 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-11-12 16:16:07,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 256 flow [2024-11-12 16:16:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-11-12 16:16:07,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7425742574257426 [2024-11-12 16:16:07,412 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 202 flow. Second operand 3 states and 225 transitions. [2024-11-12 16:16:07,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 256 flow [2024-11-12 16:16:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:16:07,416 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 190 flow [2024-11-12 16:16:07,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2024-11-12 16:16:07,418 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2024-11-12 16:16:07,419 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 190 flow [2024-11-12 16:16:07,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 16:16:07,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:07,419 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-12 16:16:07,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:16:07,419 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:07,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 600687964, now seen corresponding path program 1 times [2024-11-12 16:16:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230034782] [2024-11-12 16:16:07,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:07,640 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 16:16:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230034782] [2024-11-12 16:16:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230034782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:07,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:16:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966464495] [2024-11-12 16:16:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:07,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:07,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-12 16:16:07,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 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 16:16:07,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:07,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-12 16:16:07,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:08,098 INFO L124 PetriNetUnfolderBase]: 81/343 cut-off events. [2024-11-12 16:16:08,098 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:16:08,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 343 events. 81/343 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1638 event pairs, 80 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 492. Up to 202 conditions per place. [2024-11-12 16:16:08,101 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 42 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-11-12 16:16:08,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 308 flow [2024-11-12 16:16:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:16:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:16:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2024-11-12 16:16:08,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6658415841584159 [2024-11-12 16:16:08,108 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 190 flow. Second operand 4 states and 269 transitions. [2024-11-12 16:16:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 308 flow [2024-11-12 16:16:08,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:16:08,112 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 230 flow [2024-11-12 16:16:08,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-11-12 16:16:08,115 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2024-11-12 16:16:08,115 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 230 flow [2024-11-12 16:16:08,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 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 16:16:08,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:08,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:08,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:16:08,116 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:08,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588596, now seen corresponding path program 1 times [2024-11-12 16:16:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:08,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156967763] [2024-11-12 16:16:08,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:08,437 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 16:16:08,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156967763] [2024-11-12 16:16:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156967763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:08,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094685818] [2024-11-12 16:16:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:08,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:08,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-12 16:16:08,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 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 16:16:08,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:08,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-12 16:16:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:09,000 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-11-12 16:16:09,000 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:16:09,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 294 events. 64/294 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1298 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 457. Up to 154 conditions per place. [2024-11-12 16:16:09,003 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 29 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-12 16:16:09,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 314 flow [2024-11-12 16:16:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:16:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:16:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 445 transitions. [2024-11-12 16:16:09,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5507425742574258 [2024-11-12 16:16:09,006 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 230 flow. Second operand 8 states and 445 transitions. [2024-11-12 16:16:09,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 314 flow [2024-11-12 16:16:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:09,008 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 254 flow [2024-11-12 16:16:09,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-11-12 16:16:09,009 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2024-11-12 16:16:09,009 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 254 flow [2024-11-12 16:16:09,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 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 16:16:09,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:09,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:09,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:16:09,012 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:09,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1402588597, now seen corresponding path program 1 times [2024-11-12 16:16:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436637426] [2024-11-12 16:16:09,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:09,488 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 16:16:09,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:09,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436637426] [2024-11-12 16:16:09,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436637426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:09,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:09,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:16:09,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719826455] [2024-11-12 16:16:09,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:09,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:16:09,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:16:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:16:09,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-11-12 16:16:09,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:16:09,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-11-12 16:16:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:10,209 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-11-12 16:16:10,210 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 16:16:10,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 290 events. 64/290 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1289 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 444. Up to 158 conditions per place. [2024-11-12 16:16:10,213 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 32 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-12 16:16:10,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 340 flow [2024-11-12 16:16:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:16:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:16:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2024-11-12 16:16:10,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5247524752475248 [2024-11-12 16:16:10,215 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 254 flow. Second operand 7 states and 371 transitions. [2024-11-12 16:16:10,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 340 flow [2024-11-12 16:16:10,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-12 16:16:10,219 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 242 flow [2024-11-12 16:16:10,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=88, 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=7, PETRI_FLOW=242, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-12 16:16:10,222 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-12 16:16:10,223 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 242 flow [2024-11-12 16:16:10,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:16:10,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:10,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:10,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:16:10,225 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:10,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash -732068759, now seen corresponding path program 1 times [2024-11-12 16:16:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:10,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977559385] [2024-11-12 16:16:10,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:10,347 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 16:16:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977559385] [2024-11-12 16:16:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977559385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601608841] [2024-11-12 16:16:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:10,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:10,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-12 16:16:10,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 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 16:16:10,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:10,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-12 16:16:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:10,622 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-11-12 16:16:10,622 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:16:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 288 events. 64/288 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1268 event pairs, 63 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 437. Up to 158 conditions per place. [2024-11-12 16:16:10,624 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-11-12 16:16:10,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 326 flow [2024-11-12 16:16:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-12 16:16:10,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-11-12 16:16:10,627 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 242 flow. Second operand 5 states and 319 transitions. [2024-11-12 16:16:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 326 flow [2024-11-12 16:16:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:16:10,631 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 240 flow [2024-11-12 16:16:10,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-11-12 16:16:10,633 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2024-11-12 16:16:10,634 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 240 flow [2024-11-12 16:16:10,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 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 16:16:10,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:10,635 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:10,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:16:10,635 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:10,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -732068758, now seen corresponding path program 1 times [2024-11-12 16:16:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958804103] [2024-11-12 16:16:10,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:10,833 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 16:16:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958804103] [2024-11-12 16:16:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958804103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:10,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:10,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:16:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977513423] [2024-11-12 16:16:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:10,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:16:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:16:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:16:11,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-12 16:16:11,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 16:16:11,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:11,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-12 16:16:11,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:11,189 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-11-12 16:16:11,189 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-12 16:16:11,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 286 events. 64/286 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1262 event pairs, 63 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 434. Up to 158 conditions per place. [2024-11-12 16:16:11,191 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 27 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-12 16:16:11,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 318 flow [2024-11-12 16:16:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:16:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:16:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-12 16:16:11,192 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6554455445544555 [2024-11-12 16:16:11,192 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 240 flow. Second operand 5 states and 331 transitions. [2024-11-12 16:16:11,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 318 flow [2024-11-12 16:16:11,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:11,194 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 238 flow [2024-11-12 16:16:11,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2024-11-12 16:16:11,195 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -13 predicate places. [2024-11-12 16:16:11,196 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 238 flow [2024-11-12 16:16:11,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 16:16:11,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:11,196 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:16:11,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 16:16:11,197 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:11,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1460589232, now seen corresponding path program 1 times [2024-11-12 16:16:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:11,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197500050] [2024-11-12 16:16:11,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:11,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:11,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197500050] [2024-11-12 16:16:11,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197500050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:11,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061336901] [2024-11-12 16:16:11,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:11,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:11,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:11,552 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 16:16:11,554 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 16:16:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:11,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-12 16:16:11,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:11,827 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:11,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:11,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:11,923 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:11,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:11,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 16:16:11,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:12,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:12,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:12,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:12,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-12 16:16:12,472 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:16:12,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-12 16:16:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061336901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:12,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:12,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 4] total 17 [2024-11-12 16:16:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619832037] [2024-11-12 16:16:12,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:12,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:16:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:16:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:16:15,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-12 16:16:15,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 238 flow. Second operand has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 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 16:16:15,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:15,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-12 16:16:15,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:16,080 INFO L124 PetriNetUnfolderBase]: 93/386 cut-off events. [2024-11-12 16:16:16,081 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-12 16:16:16,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 386 events. 93/386 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1897 event pairs, 90 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 563. Up to 218 conditions per place. [2024-11-12 16:16:16,085 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 54 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-11-12 16:16:16,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 494 flow [2024-11-12 16:16:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:16:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:16:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 662 transitions. [2024-11-12 16:16:16,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5958595859585959 [2024-11-12 16:16:16,090 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 238 flow. Second operand 11 states and 662 transitions. [2024-11-12 16:16:16,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 494 flow [2024-11-12 16:16:16,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 432 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:16:16,095 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 320 flow [2024-11-12 16:16:16,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=320, PETRI_PLACES=100, PETRI_TRANSITIONS=93} [2024-11-12 16:16:16,096 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2024-11-12 16:16:16,097 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 320 flow [2024-11-12 16:16:16,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 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 16:16:16,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:16,098 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1] [2024-11-12 16:16:16,118 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 16:16:16,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:16,299 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:16,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1278882883, now seen corresponding path program 1 times [2024-11-12 16:16:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:16,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957187297] [2024-11-12 16:16:16,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:16:16,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:16,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957187297] [2024-11-12 16:16:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957187297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:16:16,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:16:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:16:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013805385] [2024-11-12 16:16:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:16:16,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:16:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:16:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:16:16,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 101 [2024-11-12 16:16:16,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 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 16:16:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 101 [2024-11-12 16:16:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:16,750 INFO L124 PetriNetUnfolderBase]: 75/327 cut-off events. [2024-11-12 16:16:16,752 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-12 16:16:16,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 327 events. 75/327 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1446 event pairs, 72 based on Foata normal form. 5/281 useless extension candidates. Maximal degree in co-relation 553. Up to 214 conditions per place. [2024-11-12 16:16:16,754 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 50 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2024-11-12 16:16:16,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 87 transitions, 402 flow [2024-11-12 16:16:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:16:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:16:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-11-12 16:16:16,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7161716171617162 [2024-11-12 16:16:16,756 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 320 flow. Second operand 3 states and 217 transitions. [2024-11-12 16:16:16,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 87 transitions, 402 flow [2024-11-12 16:16:16,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 382 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 16:16:16,759 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 282 flow [2024-11-12 16:16:16,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-11-12 16:16:16,760 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-11-12 16:16:16,761 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 282 flow [2024-11-12 16:16:16,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 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 16:16:16,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:16,761 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-12 16:16:16,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:16:16,762 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:16,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1278868616, now seen corresponding path program 1 times [2024-11-12 16:16:16,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:16,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447308098] [2024-11-12 16:16:16,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447308098] [2024-11-12 16:16:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447308098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210060957] [2024-11-12 16:16:16,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:16,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:16,940 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 16:16:16,941 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 16:16:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:17,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 16:16:17,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:17,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210060957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:17,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:17,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-12 16:16:17,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706767299] [2024-11-12 16:16:17,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:17,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:16:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:16:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:16:17,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-12 16:16:17,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 282 flow. Second operand has 9 states, 9 states have (on average 72.55555555555556) internal successors, (653), 9 states have internal predecessors, (653), 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 16:16:17,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:17,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-12 16:16:17,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:17,450 INFO L124 PetriNetUnfolderBase]: 64/316 cut-off events. [2024-11-12 16:16:17,450 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-12 16:16:17,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 316 events. 64/316 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1134 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 591. Up to 153 conditions per place. [2024-11-12 16:16:17,452 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 61 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2024-11-12 16:16:17,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 516 flow [2024-11-12 16:16:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:16:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:16:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 617 transitions. [2024-11-12 16:16:17,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7636138613861386 [2024-11-12 16:16:17,454 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 282 flow. Second operand 8 states and 617 transitions. [2024-11-12 16:16:17,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 516 flow [2024-11-12 16:16:17,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:16:17,457 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 317 flow [2024-11-12 16:16:17,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2024-11-12 16:16:17,457 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 0 predicate places. [2024-11-12 16:16:17,457 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 317 flow [2024-11-12 16:16:17,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.55555555555556) internal successors, (653), 9 states have internal predecessors, (653), 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 16:16:17,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:17,458 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-11-12 16:16:17,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:16:17,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-12 16:16:17,660 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:17,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 717365036, now seen corresponding path program 2 times [2024-11-12 16:16:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:17,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537271888] [2024-11-12 16:16:17,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537271888] [2024-11-12 16:16:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537271888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537534447] [2024-11-12 16:16:19,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:16:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:19,230 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 16:16:19,231 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 16:16:19,517 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:16:19,517 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:16:19,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-12 16:16:19,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:19,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:19,661 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:19,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:19,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:19,800 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:16:19,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:16:19,818 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:19,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:19,886 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:19,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:19,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:19,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 16:16:20,081 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:16:20,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:16:20,102 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:20,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:20,203 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:16:20,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:16:20,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-12 16:16:20,224 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:20,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:20,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:20,450 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:16:20,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:16:20,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:16:20,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:16:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:20,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:20,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:20,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-12 16:16:20,932 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:16:20,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-12 16:16:21,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:21,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-12 16:16:21,179 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:16:21,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-12 16:16:21,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:21,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-12 16:16:21,433 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:16:21,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-12 16:16:21,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:16:21,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-12 16:16:21,724 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:16:21,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-12 16:16:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:21,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537534447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:21,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:21,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 10] total 45 [2024-11-12 16:16:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897961895] [2024-11-12 16:16:21,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:21,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-12 16:16:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-12 16:16:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 16:16:33,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-11-12 16:16:33,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 317 flow. Second operand has 47 states, 47 states have (on average 55.04255319148936) internal successors, (2587), 47 states have internal predecessors, (2587), 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 16:16:33,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:33,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-11-12 16:16:33,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:35,458 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-11-12 16:16:35,458 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-12 16:16:35,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 389 events. 77/389 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1508 event pairs, 72 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 815. Up to 179 conditions per place. [2024-11-12 16:16:35,460 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 73 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-11-12 16:16:35,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 861 flow [2024-11-12 16:16:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-12 16:16:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-12 16:16:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1383 transitions. [2024-11-12 16:16:35,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5705445544554455 [2024-11-12 16:16:35,468 INFO L175 Difference]: Start difference. First operand has 103 places, 88 transitions, 317 flow. Second operand 24 states and 1383 transitions. [2024-11-12 16:16:35,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 861 flow [2024-11-12 16:16:35,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 845 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-12 16:16:35,475 INFO L231 Difference]: Finished difference. Result has 135 places, 104 transitions, 583 flow [2024-11-12 16:16:35,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=583, PETRI_PLACES=135, PETRI_TRANSITIONS=104} [2024-11-12 16:16:35,479 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 32 predicate places. [2024-11-12 16:16:35,479 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 104 transitions, 583 flow [2024-11-12 16:16:35,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 55.04255319148936) internal successors, (2587), 47 states have internal predecessors, (2587), 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 16:16:35,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:35,481 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-11-12 16:16:35,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 16:16:35,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:35,681 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:35,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1160819112, now seen corresponding path program 2 times [2024-11-12 16:16:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339739412] [2024-11-12 16:16:35,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:36,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339739412] [2024-11-12 16:16:36,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339739412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:36,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619531034] [2024-11-12 16:16:36,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:16:36,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:36,129 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 16:16:36,130 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 16:16:36,518 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:16:36,518 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:16:36,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:16:36,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:16:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:36,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:16:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619531034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:16:36,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:16:36,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-12 16:16:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133513784] [2024-11-12 16:16:36,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:16:36,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:16:36,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:16:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:16:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:16:36,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-11-12 16:16:36,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 104 transitions, 583 flow. Second operand has 13 states, 13 states have (on average 73.84615384615384) internal successors, (960), 13 states have internal predecessors, (960), 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 16:16:36,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:16:36,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-11-12 16:16:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:16:36,974 INFO L124 PetriNetUnfolderBase]: 64/358 cut-off events. [2024-11-12 16:16:36,974 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-11-12 16:16:36,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 358 events. 64/358 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1146 event pairs, 63 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 821. Up to 153 conditions per place. [2024-11-12 16:16:36,976 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 86 selfloop transitions, 12 changer transitions 0/138 dead transitions. [2024-11-12 16:16:36,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 138 transitions, 953 flow [2024-11-12 16:16:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:16:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:16:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 917 transitions. [2024-11-12 16:16:36,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7566006600660066 [2024-11-12 16:16:36,979 INFO L175 Difference]: Start difference. First operand has 135 places, 104 transitions, 583 flow. Second operand 12 states and 917 transitions. [2024-11-12 16:16:36,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 138 transitions, 953 flow [2024-11-12 16:16:36,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 862 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-11-12 16:16:36,986 INFO L231 Difference]: Finished difference. Result has 137 places, 101 transitions, 478 flow [2024-11-12 16:16:36,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=478, PETRI_PLACES=137, PETRI_TRANSITIONS=101} [2024-11-12 16:16:36,988 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2024-11-12 16:16:36,988 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 101 transitions, 478 flow [2024-11-12 16:16:36,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.84615384615384) internal successors, (960), 13 states have internal predecessors, (960), 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 16:16:36,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:16:36,989 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-11-12 16:16:37,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:16:37,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:37,190 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-11-12 16:16:37,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:16:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 539150308, now seen corresponding path program 3 times [2024-11-12 16:16:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:16:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701781616] [2024-11-12 16:16:37,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:16:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:16:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:16:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:16:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:16:37,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701781616] [2024-11-12 16:16:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701781616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:16:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261439455] [2024-11-12 16:16:37,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:16:37,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:16:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:16:37,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:16:37,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process