./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s.i --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/pthread/bigshot_s.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 17:15:53,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 17:15:53,876 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 17:15:53,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 17:15:53,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 17:15:53,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 17:15:53,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 17:15:53,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 17:15:53,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 17:15:53,937 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 17:15:53,938 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 17:15:53,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 17:15:53,939 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 17:15:53,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 17:15:53,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 17:15:53,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 17:15:53,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 17:15:53,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 17:15:53,942 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 17:15:53,942 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 17:15:53,942 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 17:15:53,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 17:15:53,943 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 17:15:53,943 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 17:15:53,943 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 17:15:53,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 17:15:53,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 17:15:53,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 17:15:53,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 17:15:53,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 17:15:53,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:15:53,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 17:15:53,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 17:15:53,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 17:15:53,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 17:15:53,947 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 17:15:53,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 17:15:53,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 17:15:53,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 17:15:53,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 17:15:54,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 17:15:54,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 17:15:54,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 17:15:54,214 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 17:15:54,215 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 17:15:54,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2023-11-22 17:15:55,368 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 17:15:55,616 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 17:15:55,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2023-11-22 17:15:55,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600dbfac5/49d68aa1d4514c1baf1b8ea0713cd275/FLAG2a49790d2 [2023-11-22 17:15:55,655 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600dbfac5/49d68aa1d4514c1baf1b8ea0713cd275 [2023-11-22 17:15:55,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 17:15:55,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 17:15:55,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 17:15:55,665 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 17:15:55,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 17:15:55,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:15:55" (1/1) ... [2023-11-22 17:15:55,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550b0ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:55, skipping insertion in model container [2023-11-22 17:15:55,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:15:55" (1/1) ... [2023-11-22 17:15:55,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 17:15:56,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:15:56,151 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 17:15:56,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 17:15:56,276 INFO L206 MainTranslator]: Completed translation [2023-11-22 17:15:56,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56 WrapperNode [2023-11-22 17:15:56,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 17:15:56,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 17:15:56,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 17:15:56,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 17:15:56,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,349 INFO L138 Inliner]: procedures = 323, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2023-11-22 17:15:56,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 17:15:56,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 17:15:56,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 17:15:56,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 17:15:56,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,374 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,396 INFO L189 HeapSplitter]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2] [2023-11-22 17:15:56,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,408 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,426 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 17:15:56,426 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 17:15:56,427 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 17:15:56,427 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 17:15:56,436 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (1/1) ... [2023-11-22 17:15:56,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 17:15:56,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:15:56,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 17:15:56,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 17:15:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 17:15:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 17:15:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-11-22 17:15:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-11-22 17:15:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-11-22 17:15:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-11-22 17:15:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-22 17:15:56,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-22 17:15:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-22 17:15:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-22 17:15:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-22 17:15:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 17:15:56,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 17:15:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 17:15:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-22 17:15:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-22 17:15:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 17:15:56,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-22 17:15:56,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 17:15:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 17:15:56,506 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 17:15:56,646 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 17:15:56,648 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 17:15:56,857 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 17:15:57,031 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 17:15:57,032 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 17:15:57,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:15:57 BoogieIcfgContainer [2023-11-22 17:15:57,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 17:15:57,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 17:15:57,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 17:15:57,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 17:15:57,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:15:55" (1/3) ... [2023-11-22 17:15:57,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60052234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:15:57, skipping insertion in model container [2023-11-22 17:15:57,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:15:56" (2/3) ... [2023-11-22 17:15:57,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60052234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:15:57, skipping insertion in model container [2023-11-22 17:15:57,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:15:57" (3/3) ... [2023-11-22 17:15:57,039 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2023-11-22 17:15:57,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 17:15:57,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-22 17:15:57,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 17:15:57,099 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-22 17:15:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 59 transitions, 132 flow [2023-11-22 17:15:57,165 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2023-11-22 17:15:57,165 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 17:15:57,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 57 events. 6/57 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-11-22 17:15:57,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 59 transitions, 132 flow [2023-11-22 17:15:57,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 56 transitions, 124 flow [2023-11-22 17:15:57,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 17:15:57,195 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@31302833, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 17:15:57,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-22 17:15:57,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 17:15:57,199 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-22 17:15:57,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 17:15:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:57,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-22 17:15:57,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:57,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 8326, now seen corresponding path program 1 times [2023-11-22 17:15:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:57,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436783643] [2023-11-22 17:15:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:57,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:57,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436783643] [2023-11-22 17:15:57,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436783643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:57,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:57,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850537209] [2023-11-22 17:15:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:57,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:57,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 59 [2023-11-22 17:15:57,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-22 17:15:57,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:57,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 59 [2023-11-22 17:15:57,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:57,665 INFO L124 PetriNetUnfolderBase]: 10/72 cut-off events. [2023-11-22 17:15:57,665 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-22 17:15:57,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 72 events. 10/72 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 171 event pairs, 5 based on Foata normal form. 4/55 useless extension candidates. Maximal degree in co-relation 85. Up to 33 conditions per place. [2023-11-22 17:15:57,668 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 19 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-22 17:15:57,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 154 flow [2023-11-22 17:15:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2023-11-22 17:15:57,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672316384180791 [2023-11-22 17:15:57,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 119 transitions. [2023-11-22 17:15:57,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 119 transitions. [2023-11-22 17:15:57,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:57,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 119 transitions. [2023-11-22 17:15:57,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-22 17:15:57,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:57,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:57,700 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 124 flow. Second operand 3 states and 119 transitions. [2023-11-22 17:15:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 154 flow [2023-11-22 17:15:57,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-22 17:15:57,709 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 108 flow [2023-11-22 17:15:57,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-11-22 17:15:57,715 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-22 17:15:57,716 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 108 flow [2023-11-22 17:15:57,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-11-22 17:15:57,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:57,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-22 17:15:57,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 17:15:57,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:57,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 8327, now seen corresponding path program 1 times [2023-11-22 17:15:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765133386] [2023-11-22 17:15:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:57,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:57,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765133386] [2023-11-22 17:15:57,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765133386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:57,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:57,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 17:15:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162413939] [2023-11-22 17:15:57,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:15:57,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:15:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:15:57,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 59 [2023-11-22 17:15:57,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-22 17:15:57,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:57,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 59 [2023-11-22 17:15:57,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:57,939 INFO L124 PetriNetUnfolderBase]: 9/68 cut-off events. [2023-11-22 17:15:57,939 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2023-11-22 17:15:57,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 68 events. 9/68 cut-off events. For 3/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 163 event pairs, 4 based on Foata normal form. 3/50 useless extension candidates. Maximal degree in co-relation 95. Up to 29 conditions per place. [2023-11-22 17:15:57,940 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 17 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-22 17:15:57,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 142 flow [2023-11-22 17:15:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-22 17:15:57,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6779661016949152 [2023-11-22 17:15:57,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-22 17:15:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-22 17:15:57,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:57,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-22 17:15:57,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2023-11-22 17:15:57,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:57,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:57,945 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 108 flow. Second operand 3 states and 120 transitions. [2023-11-22 17:15:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 142 flow [2023-11-22 17:15:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:57,947 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 104 flow [2023-11-22 17:15:57,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-22 17:15:57,948 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-22 17:15:57,948 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 104 flow [2023-11-22 17:15:57,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-22 17:15:57,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:57,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:57,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 17:15:57,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:57,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash -376841306, now seen corresponding path program 1 times [2023-11-22 17:15:57,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:57,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418288980] [2023-11-22 17:15:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:57,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418288980] [2023-11-22 17:15:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418288980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 17:15:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679512002] [2023-11-22 17:15:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:15:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:15:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:15:58,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2023-11-22 17:15:58,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-22 17:15:58,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2023-11-22 17:15:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,272 INFO L124 PetriNetUnfolderBase]: 15/65 cut-off events. [2023-11-22 17:15:58,272 INFO L125 PetriNetUnfolderBase]: For 2/3 co-relation queries the response was YES. [2023-11-22 17:15:58,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 65 events. 15/65 cut-off events. For 2/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 8 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 104. Up to 41 conditions per place. [2023-11-22 17:15:58,274 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 19 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-22 17:15:58,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 138 flow [2023-11-22 17:15:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:15:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:15:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-22 17:15:58,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2023-11-22 17:15:58,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-22 17:15:58,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-22 17:15:58,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-22 17:15:58,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2023-11-22 17:15:58,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:58,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:15:58,283 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 104 flow. Second operand 3 states and 112 transitions. [2023-11-22 17:15:58,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 138 flow [2023-11-22 17:15:58,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,285 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 96 flow [2023-11-22 17:15:58,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-22 17:15:58,287 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2023-11-22 17:15:58,287 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 96 flow [2023-11-22 17:15:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-11-22 17:15:58,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 17:15:58,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:58,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 347143059, now seen corresponding path program 1 times [2023-11-22 17:15:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46522626] [2023-11-22 17:15:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46522626] [2023-11-22 17:15:58,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46522626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:58,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:58,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 17:15:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031714483] [2023-11-22 17:15:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:58,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 17:15:58,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 17:15:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-22 17:15:58,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2023-11-22 17:15:58,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 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) [2023-11-22 17:15:58,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:58,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2023-11-22 17:15:58,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:58,832 INFO L124 PetriNetUnfolderBase]: 19/86 cut-off events. [2023-11-22 17:15:58,832 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 17:15:58,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 86 events. 19/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 240 event pairs, 6 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 136. Up to 34 conditions per place. [2023-11-22 17:15:58,836 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 23 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-22 17:15:58,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 150 flow [2023-11-22 17:15:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:15:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:15:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2023-11-22 17:15:58,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805084745762712 [2023-11-22 17:15:58,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 137 transitions. [2023-11-22 17:15:58,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 137 transitions. [2023-11-22 17:15:58,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:58,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 137 transitions. [2023-11-22 17:15:58,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2023-11-22 17:15:58,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:58,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:58,842 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 96 flow. Second operand 4 states and 137 transitions. [2023-11-22 17:15:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 150 flow [2023-11-22 17:15:58,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:58,844 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 96 flow [2023-11-22 17:15:58,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-22 17:15:58,846 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2023-11-22 17:15:58,846 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 96 flow [2023-11-22 17:15:58,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 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) [2023-11-22 17:15:58,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:58,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 17:15:58,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:58,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2123466755, now seen corresponding path program 1 times [2023-11-22 17:15:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090355252] [2023-11-22 17:15:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090355252] [2023-11-22 17:15:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090355252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:59,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:59,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 17:15:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539299481] [2023-11-22 17:15:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 17:15:59,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 17:15:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-22 17:15:59,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 59 [2023-11-22 17:15:59,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2023-11-22 17:15:59,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:59,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 59 [2023-11-22 17:15:59,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:59,415 INFO L124 PetriNetUnfolderBase]: 15/84 cut-off events. [2023-11-22 17:15:59,415 INFO L125 PetriNetUnfolderBase]: For 9/10 co-relation queries the response was YES. [2023-11-22 17:15:59,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 84 events. 15/84 cut-off events. For 9/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 205 event pairs, 6 based on Foata normal form. 2/71 useless extension candidates. Maximal degree in co-relation 50. Up to 37 conditions per place. [2023-11-22 17:15:59,417 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 20 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-11-22 17:15:59,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 156 flow [2023-11-22 17:15:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 17:15:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-22 17:15:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2023-11-22 17:15:59,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6508474576271186 [2023-11-22 17:15:59,419 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 192 transitions. [2023-11-22 17:15:59,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 192 transitions. [2023-11-22 17:15:59,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:59,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 192 transitions. [2023-11-22 17:15:59,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2023-11-22 17:15:59,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 59.0) internal successors, (354), 6 states have internal predecessors, (354), 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) [2023-11-22 17:15:59,422 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 59.0) internal successors, (354), 6 states have internal predecessors, (354), 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) [2023-11-22 17:15:59,422 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 96 flow. Second operand 5 states and 192 transitions. [2023-11-22 17:15:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 156 flow [2023-11-22 17:15:59,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:15:59,424 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 113 flow [2023-11-22 17:15:59,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-22 17:15:59,426 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-22 17:15:59,426 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 113 flow [2023-11-22 17:15:59,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 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) [2023-11-22 17:15:59,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:59,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:59,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 17:15:59,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:59,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1402959659, now seen corresponding path program 1 times [2023-11-22 17:15:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383530188] [2023-11-22 17:15:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383530188] [2023-11-22 17:15:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383530188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:59,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:59,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:15:59,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849758697] [2023-11-22 17:15:59,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:59,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:15:59,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:15:59,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:15:59,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 59 [2023-11-22 17:15:59,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2023-11-22 17:15:59,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:59,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 59 [2023-11-22 17:15:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:59,586 INFO L124 PetriNetUnfolderBase]: 15/82 cut-off events. [2023-11-22 17:15:59,587 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-22 17:15:59,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 82 events. 15/82 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 189 event pairs, 1 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 56. Up to 20 conditions per place. [2023-11-22 17:15:59,588 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 19 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-22 17:15:59,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 161 flow [2023-11-22 17:15:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:15:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:15:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-22 17:15:59,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2023-11-22 17:15:59,589 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-22 17:15:59,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-22 17:15:59,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:59,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-22 17:15:59,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2023-11-22 17:15:59,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:59,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:59,591 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 113 flow. Second operand 4 states and 152 transitions. [2023-11-22 17:15:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 161 flow [2023-11-22 17:15:59,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 155 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-22 17:15:59,593 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 113 flow [2023-11-22 17:15:59,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-22 17:15:59,594 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2023-11-22 17:15:59,594 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 113 flow [2023-11-22 17:15:59,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2023-11-22 17:15:59,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:59,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:59,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 17:15:59,595 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash -542076161, now seen corresponding path program 1 times [2023-11-22 17:15:59,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:59,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326442856] [2023-11-22 17:15:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:15:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:15:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:15:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326442856] [2023-11-22 17:15:59,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326442856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:15:59,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:15:59,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:15:59,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981399251] [2023-11-22 17:15:59,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:15:59,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:15:59,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:15:59,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:15:59,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:15:59,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 59 [2023-11-22 17:15:59,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-11-22 17:15:59,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:15:59,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 59 [2023-11-22 17:15:59,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:15:59,779 INFO L124 PetriNetUnfolderBase]: 14/74 cut-off events. [2023-11-22 17:15:59,779 INFO L125 PetriNetUnfolderBase]: For 23/24 co-relation queries the response was YES. [2023-11-22 17:15:59,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 74 events. 14/74 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 158 event pairs, 4 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 57. Up to 32 conditions per place. [2023-11-22 17:15:59,780 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 21 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-22 17:15:59,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 167 flow [2023-11-22 17:15:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:15:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:15:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-22 17:15:59,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673728813559322 [2023-11-22 17:15:59,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-22 17:15:59,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-22 17:15:59,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:15:59,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-22 17:15:59,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-22 17:15:59,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:59,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:15:59,784 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 113 flow. Second operand 4 states and 159 transitions. [2023-11-22 17:15:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 167 flow [2023-11-22 17:15:59,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 157 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:15:59,785 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 114 flow [2023-11-22 17:15:59,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-22 17:15:59,786 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2023-11-22 17:15:59,786 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 114 flow [2023-11-22 17:15:59,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-11-22 17:15:59,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:15:59,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:15:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 17:15:59,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:15:59,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:15:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1615652988, now seen corresponding path program 1 times [2023-11-22 17:15:59,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:15:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511277873] [2023-11-22 17:15:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:15:59,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:15:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511277873] [2023-11-22 17:16:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511277873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904405355] [2023-11-22 17:16:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:00,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:00,122 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) [2023-11-22 17:16:00,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 17:16:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:00,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 17:16:00,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:00,323 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2023-11-22 17:16:00,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 20 [2023-11-22 17:16:00,341 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-22 17:16:00,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 19 treesize of output 13 [2023-11-22 17:16:00,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:00,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-11-22 17:16:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:00,393 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 [2023-11-22 17:16:00,539 INFO L349 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-11-22 17:16:00,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-22 17:16:00,553 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 17:16:00,554 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 35 treesize of output 35 [2023-11-22 17:16:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:00,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:01,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904405355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:01,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:01,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-22 17:16:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389420757] [2023-11-22 17:16:01,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 17:16:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 17:16:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-22 17:16:01,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 59 [2023-11-22 17:16:01,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 114 flow. Second operand has 16 states, 16 states have (on average 32.75) internal successors, (524), 16 states have internal predecessors, (524), 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) [2023-11-22 17:16:01,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:01,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 59 [2023-11-22 17:16:01,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:02,250 INFO L124 PetriNetUnfolderBase]: 33/133 cut-off events. [2023-11-22 17:16:02,250 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-22 17:16:02,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 133 events. 33/133 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 238 event pairs, 6 based on Foata normal form. 12/142 useless extension candidates. Maximal degree in co-relation 96. Up to 38 conditions per place. [2023-11-22 17:16:02,251 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 32 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2023-11-22 17:16:02,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 244 flow [2023-11-22 17:16:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 17:16:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 17:16:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 290 transitions. [2023-11-22 17:16:02,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.614406779661017 [2023-11-22 17:16:02,253 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 290 transitions. [2023-11-22 17:16:02,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 290 transitions. [2023-11-22 17:16:02,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:02,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 290 transitions. [2023-11-22 17:16:02,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 36.25) internal successors, (290), 8 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) [2023-11-22 17:16:02,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 59.0) internal successors, (531), 9 states have internal predecessors, (531), 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) [2023-11-22 17:16:02,256 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 59.0) internal successors, (531), 9 states have internal predecessors, (531), 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) [2023-11-22 17:16:02,256 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 114 flow. Second operand 8 states and 290 transitions. [2023-11-22 17:16:02,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 244 flow [2023-11-22 17:16:02,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:16:02,258 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 171 flow [2023-11-22 17:16:02,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-22 17:16:02,259 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-22 17:16:02,259 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 171 flow [2023-11-22 17:16:02,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.75) internal successors, (524), 16 states have internal predecessors, (524), 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) [2023-11-22 17:16:02,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:02,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:02,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:02,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:02,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1865362478, now seen corresponding path program 1 times [2023-11-22 17:16:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291019830] [2023-11-22 17:16:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:02,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291019830] [2023-11-22 17:16:02,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291019830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:16:02,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:16:02,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 17:16:02,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347595867] [2023-11-22 17:16:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:16:02,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 17:16:02,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 17:16:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 17:16:02,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:02,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-11-22 17:16:02,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:02,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:02,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:02,572 INFO L124 PetriNetUnfolderBase]: 21/116 cut-off events. [2023-11-22 17:16:02,572 INFO L125 PetriNetUnfolderBase]: For 103/104 co-relation queries the response was YES. [2023-11-22 17:16:02,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 116 events. 21/116 cut-off events. For 103/104 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 11 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 182. Up to 52 conditions per place. [2023-11-22 17:16:02,575 INFO L140 encePairwiseOnDemand]: 57/59 looper letters, 25 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-22 17:16:02,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 223 flow [2023-11-22 17:16:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 17:16:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 17:16:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-22 17:16:02,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6949152542372882 [2023-11-22 17:16:02,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-22 17:16:02,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-22 17:16:02,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:02,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-22 17:16:02,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2023-11-22 17:16:02,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:16:02,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2023-11-22 17:16:02,578 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 171 flow. Second operand 3 states and 123 transitions. [2023-11-22 17:16:02,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 223 flow [2023-11-22 17:16:02,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 207 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-22 17:16:02,583 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 155 flow [2023-11-22 17:16:02,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-22 17:16:02,584 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-22 17:16:02,584 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 155 flow [2023-11-22 17:16:02,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2023-11-22 17:16:02,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:02,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:02,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 17:16:02,585 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:02,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1255854162, now seen corresponding path program 1 times [2023-11-22 17:16:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856067229] [2023-11-22 17:16:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856067229] [2023-11-22 17:16:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856067229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188533030] [2023-11-22 17:16:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:02,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:02,724 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) [2023-11-22 17:16:02,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 17:16:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:02,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 17:16:02,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:02,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 17:16:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:02,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188533030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:02,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-22 17:16:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587489162] [2023-11-22 17:16:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:03,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 17:16:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:03,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 17:16:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-22 17:16:03,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 59 [2023-11-22 17:16:03,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 155 flow. Second operand has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 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) [2023-11-22 17:16:03,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:03,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 59 [2023-11-22 17:16:03,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:03,326 INFO L124 PetriNetUnfolderBase]: 26/122 cut-off events. [2023-11-22 17:16:03,326 INFO L125 PetriNetUnfolderBase]: For 62/63 co-relation queries the response was YES. [2023-11-22 17:16:03,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 122 events. 26/122 cut-off events. For 62/63 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 4 based on Foata normal form. 7/125 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2023-11-22 17:16:03,327 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-11-22 17:16:03,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 257 flow [2023-11-22 17:16:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 17:16:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 17:16:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 266 transitions. [2023-11-22 17:16:03,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2023-11-22 17:16:03,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 266 transitions. [2023-11-22 17:16:03,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 266 transitions. [2023-11-22 17:16:03,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:03,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 266 transitions. [2023-11-22 17:16:03,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.0) internal successors, (266), 7 states have internal predecessors, (266), 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) [2023-11-22 17:16:03,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 59.0) internal successors, (472), 8 states have internal predecessors, (472), 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) [2023-11-22 17:16:03,332 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 59.0) internal successors, (472), 8 states have internal predecessors, (472), 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) [2023-11-22 17:16:03,332 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 155 flow. Second operand 7 states and 266 transitions. [2023-11-22 17:16:03,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 257 flow [2023-11-22 17:16:03,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 17:16:03,334 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 204 flow [2023-11-22 17:16:03,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-11-22 17:16:03,335 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-22 17:16:03,335 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 204 flow [2023-11-22 17:16:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.72727272727273) internal successors, (382), 11 states have internal predecessors, (382), 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) [2023-11-22 17:16:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:03,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 17:16:03,550 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:03,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2018798139, now seen corresponding path program 1 times [2023-11-22 17:16:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:03,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586105369] [2023-11-22 17:16:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:03,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586105369] [2023-11-22 17:16:03,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586105369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:16:03,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:16:03,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 17:16:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564178828] [2023-11-22 17:16:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:16:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 17:16:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 17:16:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 17:16:03,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 59 [2023-11-22 17:16:03,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-22 17:16:03,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:03,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 59 [2023-11-22 17:16:03,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:03,661 INFO L124 PetriNetUnfolderBase]: 20/115 cut-off events. [2023-11-22 17:16:03,661 INFO L125 PetriNetUnfolderBase]: For 186/187 co-relation queries the response was YES. [2023-11-22 17:16:03,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 115 events. 20/115 cut-off events. For 186/187 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2023-11-22 17:16:03,663 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 24 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-11-22 17:16:03,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 45 transitions, 258 flow [2023-11-22 17:16:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 17:16:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-22 17:16:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2023-11-22 17:16:03,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635593220338983 [2023-11-22 17:16:03,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 150 transitions. [2023-11-22 17:16:03,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 150 transitions. [2023-11-22 17:16:03,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:03,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 150 transitions. [2023-11-22 17:16:03,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2023-11-22 17:16:03,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:16:03,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 59.0) internal successors, (295), 5 states have internal predecessors, (295), 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) [2023-11-22 17:16:03,667 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 204 flow. Second operand 4 states and 150 transitions. [2023-11-22 17:16:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 45 transitions, 258 flow [2023-11-22 17:16:03,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 244 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-22 17:16:03,669 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 194 flow [2023-11-22 17:16:03,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-11-22 17:16:03,670 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-22 17:16:03,670 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 194 flow [2023-11-22 17:16:03,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2023-11-22 17:16:03,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:03,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 17:16:03,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:03,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -879665171, now seen corresponding path program 1 times [2023-11-22 17:16:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511821308] [2023-11-22 17:16:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:03,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:03,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511821308] [2023-11-22 17:16:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511821308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:16:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:16:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-22 17:16:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996332479] [2023-11-22 17:16:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:16:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 17:16:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 17:16:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:16:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 59 [2023-11-22 17:16:03,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 194 flow. Second operand has 9 states, 9 states have (on average 32.22222222222222) internal successors, (290), 9 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) [2023-11-22 17:16:03,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:03,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 59 [2023-11-22 17:16:03,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:04,142 INFO L124 PetriNetUnfolderBase]: 24/135 cut-off events. [2023-11-22 17:16:04,143 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-22 17:16:04,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 135 events. 24/135 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 12 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 312. Up to 53 conditions per place. [2023-11-22 17:16:04,144 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 31 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2023-11-22 17:16:04,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 59 transitions, 315 flow [2023-11-22 17:16:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 17:16:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 17:16:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 400 transitions. [2023-11-22 17:16:04,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649717514124294 [2023-11-22 17:16:04,146 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 400 transitions. [2023-11-22 17:16:04,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 400 transitions. [2023-11-22 17:16:04,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:04,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 400 transitions. [2023-11-22 17:16:04,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 33.333333333333336) internal successors, (400), 12 states have internal predecessors, (400), 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) [2023-11-22 17:16:04,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:04,149 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:04,149 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 194 flow. Second operand 12 states and 400 transitions. [2023-11-22 17:16:04,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 59 transitions, 315 flow [2023-11-22 17:16:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 305 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:16:04,152 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 252 flow [2023-11-22 17:16:04,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=252, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-11-22 17:16:04,154 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-11-22 17:16:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 252 flow [2023-11-22 17:16:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.22222222222222) internal successors, (290), 9 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) [2023-11-22 17:16:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:04,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-22 17:16:04,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:04,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1364103319, now seen corresponding path program 1 times [2023-11-22 17:16:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036538508] [2023-11-22 17:16:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:04,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036538508] [2023-11-22 17:16:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036538508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 17:16:04,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 17:16:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 17:16:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399542767] [2023-11-22 17:16:04,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 17:16:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 17:16:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 17:16:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-22 17:16:04,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 59 [2023-11-22 17:16:04,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 252 flow. Second operand has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 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) [2023-11-22 17:16:04,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:04,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 59 [2023-11-22 17:16:04,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:04,699 INFO L124 PetriNetUnfolderBase]: 20/128 cut-off events. [2023-11-22 17:16:04,699 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-22 17:16:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 128 events. 20/128 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 259 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 333. Up to 45 conditions per place. [2023-11-22 17:16:04,703 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 24 selfloop transitions, 7 changer transitions 8/57 dead transitions. [2023-11-22 17:16:04,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 57 transitions, 341 flow [2023-11-22 17:16:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 17:16:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 17:16:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 346 transitions. [2023-11-22 17:16:04,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864406779661017 [2023-11-22 17:16:04,705 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 346 transitions. [2023-11-22 17:16:04,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 346 transitions. [2023-11-22 17:16:04,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:04,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 346 transitions. [2023-11-22 17:16:04,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 34.6) internal successors, (346), 10 states have internal predecessors, (346), 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) [2023-11-22 17:16:04,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2023-11-22 17:16:04,710 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2023-11-22 17:16:04,710 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 252 flow. Second operand 10 states and 346 transitions. [2023-11-22 17:16:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 57 transitions, 341 flow [2023-11-22 17:16:04,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 57 transitions, 331 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-22 17:16:04,712 INFO L231 Difference]: Finished difference. Result has 79 places, 46 transitions, 227 flow [2023-11-22 17:16:04,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=227, PETRI_PLACES=79, PETRI_TRANSITIONS=46} [2023-11-22 17:16:04,714 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2023-11-22 17:16:04,714 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 46 transitions, 227 flow [2023-11-22 17:16:04,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 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) [2023-11-22 17:16:04,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:04,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:04,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-22 17:16:04,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:04,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1745253990, now seen corresponding path program 1 times [2023-11-22 17:16:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607901805] [2023-11-22 17:16:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607901805] [2023-11-22 17:16:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607901805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656409169] [2023-11-22 17:16:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:04,927 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) [2023-11-22 17:16:04,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 17:16:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:05,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 17:16:05,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:05,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:05,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656409169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:05,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-22 17:16:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021309186] [2023-11-22 17:16:05,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:05,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 17:16:05,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 17:16:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-22 17:16:05,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:05,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 46 transitions, 227 flow. Second operand has 14 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 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) [2023-11-22 17:16:05,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:05,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:05,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:05,492 INFO L124 PetriNetUnfolderBase]: 19/116 cut-off events. [2023-11-22 17:16:05,493 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-11-22 17:16:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 116 events. 19/116 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 9 based on Foata normal form. 2/117 useless extension candidates. Maximal degree in co-relation 300. Up to 42 conditions per place. [2023-11-22 17:16:05,493 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 6 changer transitions 1/50 dead transitions. [2023-11-22 17:16:05,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 50 transitions, 294 flow [2023-11-22 17:16:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 17:16:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-22 17:16:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 269 transitions. [2023-11-22 17:16:05,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6513317191283293 [2023-11-22 17:16:05,496 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 269 transitions. [2023-11-22 17:16:05,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 269 transitions. [2023-11-22 17:16:05,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:05,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 269 transitions. [2023-11-22 17:16:05,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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) [2023-11-22 17:16:05,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 59.0) internal successors, (472), 8 states have internal predecessors, (472), 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) [2023-11-22 17:16:05,498 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 59.0) internal successors, (472), 8 states have internal predecessors, (472), 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) [2023-11-22 17:16:05,498 INFO L175 Difference]: Start difference. First operand has 79 places, 46 transitions, 227 flow. Second operand 7 states and 269 transitions. [2023-11-22 17:16:05,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 50 transitions, 294 flow [2023-11-22 17:16:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 50 transitions, 272 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-22 17:16:05,500 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 215 flow [2023-11-22 17:16:05,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-11-22 17:16:05,501 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-11-22 17:16:05,501 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 215 flow [2023-11-22 17:16:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 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) [2023-11-22 17:16:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:05,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:05,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:05,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1194272613, now seen corresponding path program 2 times [2023-11-22 17:16:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:05,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681271063] [2023-11-22 17:16:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:06,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681271063] [2023-11-22 17:16:06,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681271063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:06,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019809410] [2023-11-22 17:16:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:16:06,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:06,073 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) [2023-11-22 17:16:06,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 17:16:06,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:16:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:06,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 17:16:06,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:06,201 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-22 17:16:06,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-22 17:16:06,206 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 [2023-11-22 17:16:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:06,225 INFO L349 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-22 17:16:06,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2023-11-22 17:16:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:06,247 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 [2023-11-22 17:16:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:06,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:06,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019809410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:06,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:06,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-11-22 17:16:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297282733] [2023-11-22 17:16:06,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 17:16:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 17:16:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-11-22 17:16:08,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 59 [2023-11-22 17:16:08,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 215 flow. Second operand has 25 states, 25 states have (on average 34.2) internal successors, (855), 25 states have internal predecessors, (855), 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) [2023-11-22 17:16:08,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:08,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 59 [2023-11-22 17:16:08,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:08,517 INFO L124 PetriNetUnfolderBase]: 50/204 cut-off events. [2023-11-22 17:16:08,517 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2023-11-22 17:16:08,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 204 events. 50/204 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 323 event pairs, 6 based on Foata normal form. 8/211 useless extension candidates. Maximal degree in co-relation 599. Up to 40 conditions per place. [2023-11-22 17:16:08,519 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 47 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-11-22 17:16:08,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 505 flow [2023-11-22 17:16:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 17:16:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 17:16:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 441 transitions. [2023-11-22 17:16:08,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228813559322034 [2023-11-22 17:16:08,521 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 441 transitions. [2023-11-22 17:16:08,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 441 transitions. [2023-11-22 17:16:08,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:08,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 441 transitions. [2023-11-22 17:16:08,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.75) internal successors, (441), 12 states have internal predecessors, (441), 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) [2023-11-22 17:16:08,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:08,525 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:08,525 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 215 flow. Second operand 12 states and 441 transitions. [2023-11-22 17:16:08,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 505 flow [2023-11-22 17:16:08,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 493 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-22 17:16:08,528 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 350 flow [2023-11-22 17:16:08,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2023-11-22 17:16:08,529 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-11-22 17:16:08,529 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 350 flow [2023-11-22 17:16:08,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 34.2) internal successors, (855), 25 states have internal predecessors, (855), 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) [2023-11-22 17:16:08,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:08,530 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:08,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:08,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 17:16:08,744 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:08,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -939703267, now seen corresponding path program 2 times [2023-11-22 17:16:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141675392] [2023-11-22 17:16:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:08,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:08,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141675392] [2023-11-22 17:16:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141675392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:08,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532262967] [2023-11-22 17:16:08,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:16:08,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:08,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:08,946 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) [2023-11-22 17:16:08,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 17:16:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-22 17:16:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:09,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-22 17:16:09,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:09,089 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-22 17:16:09,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-22 17:16:09,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-22 17:16:09,106 INFO L349 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2023-11-22 17:16:09,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 1 [2023-11-22 17:16:09,134 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-22 17:16:09,135 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 [2023-11-22 17:16:09,146 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 17:16:09,147 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 [2023-11-22 17:16:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 17:16:09,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-22 17:16:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532262967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:09,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:09,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-11-22 17:16:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105592467] [2023-11-22 17:16:09,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 17:16:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 17:16:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-22 17:16:10,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 59 [2023-11-22 17:16:10,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 350 flow. Second operand has 16 states, 16 states have (on average 33.8125) internal successors, (541), 16 states have internal predecessors, (541), 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) [2023-11-22 17:16:10,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:10,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 59 [2023-11-22 17:16:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:11,320 INFO L124 PetriNetUnfolderBase]: 57/201 cut-off events. [2023-11-22 17:16:11,320 INFO L125 PetriNetUnfolderBase]: For 587/588 co-relation queries the response was YES. [2023-11-22 17:16:11,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 201 events. 57/201 cut-off events. For 587/588 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 292 event pairs, 2 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 644. Up to 45 conditions per place. [2023-11-22 17:16:11,321 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 45 selfloop transitions, 26 changer transitions 0/84 dead transitions. [2023-11-22 17:16:11,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 84 transitions, 578 flow [2023-11-22 17:16:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 17:16:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-22 17:16:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 608 transitions. [2023-11-22 17:16:11,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725047080979284 [2023-11-22 17:16:11,324 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 608 transitions. [2023-11-22 17:16:11,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 608 transitions. [2023-11-22 17:16:11,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:11,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 608 transitions. [2023-11-22 17:16:11,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 33.77777777777778) internal successors, (608), 18 states have internal predecessors, (608), 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) [2023-11-22 17:16:11,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 59.0) internal successors, (1121), 19 states have internal predecessors, (1121), 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) [2023-11-22 17:16:11,328 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 59.0) internal successors, (1121), 19 states have internal predecessors, (1121), 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) [2023-11-22 17:16:11,328 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 350 flow. Second operand 18 states and 608 transitions. [2023-11-22 17:16:11,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 84 transitions, 578 flow [2023-11-22 17:16:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 550 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-22 17:16:11,332 INFO L231 Difference]: Finished difference. Result has 89 places, 58 transitions, 391 flow [2023-11-22 17:16:11,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=391, PETRI_PLACES=89, PETRI_TRANSITIONS=58} [2023-11-22 17:16:11,332 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2023-11-22 17:16:11,333 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 58 transitions, 391 flow [2023-11-22 17:16:11,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.8125) internal successors, (541), 16 states have internal predecessors, (541), 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) [2023-11-22 17:16:11,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:11,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:11,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 17:16:11,549 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:11,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -729417847, now seen corresponding path program 1 times [2023-11-22 17:16:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:11,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395231683] [2023-11-22 17:16:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395231683] [2023-11-22 17:16:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395231683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094731571] [2023-11-22 17:16:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:11,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:11,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 17:16:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:11,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 17:16:11,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:12,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:12,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:12,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094731571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:12,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:12,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-22 17:16:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945800176] [2023-11-22 17:16:12,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:12,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-22 17:16:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:12,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-22 17:16:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-22 17:16:12,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:12,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 58 transitions, 391 flow. Second operand has 17 states, 17 states have (on average 36.94117647058823) internal successors, (628), 17 states have internal predecessors, (628), 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) [2023-11-22 17:16:12,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:12,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:12,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:12,533 INFO L124 PetriNetUnfolderBase]: 35/178 cut-off events. [2023-11-22 17:16:12,533 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-22 17:16:12,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 178 events. 35/178 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 262 event pairs, 18 based on Foata normal form. 2/179 useless extension candidates. Maximal degree in co-relation 559. Up to 75 conditions per place. [2023-11-22 17:16:12,534 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 33 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2023-11-22 17:16:12,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 63 transitions, 475 flow [2023-11-22 17:16:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 17:16:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-22 17:16:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 305 transitions. [2023-11-22 17:16:12,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461864406779662 [2023-11-22 17:16:12,537 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 305 transitions. [2023-11-22 17:16:12,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 305 transitions. [2023-11-22 17:16:12,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:12,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 305 transitions. [2023-11-22 17:16:12,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.125) internal successors, (305), 8 states have internal predecessors, (305), 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) [2023-11-22 17:16:12,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 59.0) internal successors, (531), 9 states have internal predecessors, (531), 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) [2023-11-22 17:16:12,541 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 59.0) internal successors, (531), 9 states have internal predecessors, (531), 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) [2023-11-22 17:16:12,541 INFO L175 Difference]: Start difference. First operand has 89 places, 58 transitions, 391 flow. Second operand 8 states and 305 transitions. [2023-11-22 17:16:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 63 transitions, 475 flow [2023-11-22 17:16:12,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 63 transitions, 406 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-22 17:16:12,545 INFO L231 Difference]: Finished difference. Result has 88 places, 58 transitions, 338 flow [2023-11-22 17:16:12,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=58} [2023-11-22 17:16:12,545 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2023-11-22 17:16:12,545 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 58 transitions, 338 flow [2023-11-22 17:16:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 36.94117647058823) internal successors, (628), 17 states have internal predecessors, (628), 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) [2023-11-22 17:16:12,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:12,546 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:12,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 17:16:12,762 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:12,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -135456562, now seen corresponding path program 2 times [2023-11-22 17:16:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504511330] [2023-11-22 17:16:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504511330] [2023-11-22 17:16:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504511330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968055846] [2023-11-22 17:16:13,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 17:16:13,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:13,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:13,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 17:16:13,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 17:16:13,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:13,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 17:16:13,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:13,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:13,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:13,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968055846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:13,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:13,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-22 17:16:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877035602] [2023-11-22 17:16:13,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 17:16:13,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 17:16:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-22 17:16:13,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:13,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 58 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 36.9) internal successors, (738), 20 states have internal predecessors, (738), 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) [2023-11-22 17:16:13,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:13,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:13,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:14,023 INFO L124 PetriNetUnfolderBase]: 32/173 cut-off events. [2023-11-22 17:16:14,023 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-11-22 17:16:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 173 events. 32/173 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 15 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 506. Up to 64 conditions per place. [2023-11-22 17:16:14,025 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 33 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2023-11-22 17:16:14,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 64 transitions, 431 flow [2023-11-22 17:16:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 17:16:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-22 17:16:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 342 transitions. [2023-11-22 17:16:14,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2023-11-22 17:16:14,026 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 342 transitions. [2023-11-22 17:16:14,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 342 transitions. [2023-11-22 17:16:14,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:14,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 342 transitions. [2023-11-22 17:16:14,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.0) internal successors, (342), 9 states have internal predecessors, (342), 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) [2023-11-22 17:16:14,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 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) [2023-11-22 17:16:14,029 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 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) [2023-11-22 17:16:14,029 INFO L175 Difference]: Start difference. First operand has 88 places, 58 transitions, 338 flow. Second operand 9 states and 342 transitions. [2023-11-22 17:16:14,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 64 transitions, 431 flow [2023-11-22 17:16:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 64 transitions, 415 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-22 17:16:14,032 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 345 flow [2023-11-22 17:16:14,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2023-11-22 17:16:14,033 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2023-11-22 17:16:14,033 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 345 flow [2023-11-22 17:16:14,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.9) internal successors, (738), 20 states have internal predecessors, (738), 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) [2023-11-22 17:16:14,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:14,034 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:14,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:14,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:14,252 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:14,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1019613931, now seen corresponding path program 3 times [2023-11-22 17:16:14,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:14,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558547103] [2023-11-22 17:16:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:14,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558547103] [2023-11-22 17:16:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558547103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757526048] [2023-11-22 17:16:14,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 17:16:14,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:14,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:14,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 17:16:14,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-22 17:16:14,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:14,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 17:16:14,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:14,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:14,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757526048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:15,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:15,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-22 17:16:15,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24095247] [2023-11-22 17:16:15,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:15,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 17:16:15,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 17:16:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-11-22 17:16:15,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:15,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 345 flow. Second operand has 23 states, 23 states have (on average 36.78260869565217) internal successors, (846), 23 states have internal predecessors, (846), 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) [2023-11-22 17:16:15,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:15,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:15,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:15,863 INFO L124 PetriNetUnfolderBase]: 29/168 cut-off events. [2023-11-22 17:16:15,864 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-11-22 17:16:15,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 168 events. 29/168 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 241 event pairs, 12 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 498. Up to 53 conditions per place. [2023-11-22 17:16:15,865 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 33 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2023-11-22 17:16:15,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 65 transitions, 443 flow [2023-11-22 17:16:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 17:16:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-22 17:16:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 379 transitions. [2023-11-22 17:16:15,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423728813559322 [2023-11-22 17:16:15,867 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 379 transitions. [2023-11-22 17:16:15,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 379 transitions. [2023-11-22 17:16:15,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:15,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 379 transitions. [2023-11-22 17:16:15,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.9) internal successors, (379), 10 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 17:16:15,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2023-11-22 17:16:15,872 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 59.0) internal successors, (649), 11 states have internal predecessors, (649), 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) [2023-11-22 17:16:15,872 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 345 flow. Second operand 10 states and 379 transitions. [2023-11-22 17:16:15,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 65 transitions, 443 flow [2023-11-22 17:16:15,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 65 transitions, 423 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-22 17:16:15,876 INFO L231 Difference]: Finished difference. Result has 96 places, 58 transitions, 351 flow [2023-11-22 17:16:15,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=351, PETRI_PLACES=96, PETRI_TRANSITIONS=58} [2023-11-22 17:16:15,877 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2023-11-22 17:16:15,877 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 58 transitions, 351 flow [2023-11-22 17:16:15,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 36.78260869565217) internal successors, (846), 23 states have internal predecessors, (846), 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) [2023-11-22 17:16:15,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:15,877 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:15,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:16,092 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:16,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1634546656, now seen corresponding path program 4 times [2023-11-22 17:16:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968060361] [2023-11-22 17:16:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968060361] [2023-11-22 17:16:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968060361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849542108] [2023-11-22 17:16:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 17:16:16,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:16,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:16,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 17:16:16,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 17:16:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:16,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-22 17:16:16,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:16,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:16,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:17,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849542108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:17,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:17,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-22 17:16:17,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008464835] [2023-11-22 17:16:17,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:17,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-22 17:16:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-22 17:16:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-11-22 17:16:17,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:17,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 58 transitions, 351 flow. Second operand has 26 states, 26 states have (on average 36.69230769230769) internal successors, (954), 26 states have internal predecessors, (954), 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) [2023-11-22 17:16:17,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:17,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:17,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:18,020 INFO L124 PetriNetUnfolderBase]: 26/163 cut-off events. [2023-11-22 17:16:18,020 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-22 17:16:18,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 163 events. 26/163 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 206 event pairs, 9 based on Foata normal form. 2/164 useless extension candidates. Maximal degree in co-relation 482. Up to 42 conditions per place. [2023-11-22 17:16:18,022 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 33 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2023-11-22 17:16:18,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 66 transitions, 454 flow [2023-11-22 17:16:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 17:16:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-22 17:16:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 416 transitions. [2023-11-22 17:16:18,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409861325115562 [2023-11-22 17:16:18,028 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 416 transitions. [2023-11-22 17:16:18,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 416 transitions. [2023-11-22 17:16:18,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:18,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 416 transitions. [2023-11-22 17:16:18,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 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) [2023-11-22 17:16:18,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 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) [2023-11-22 17:16:18,031 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 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) [2023-11-22 17:16:18,031 INFO L175 Difference]: Start difference. First operand has 96 places, 58 transitions, 351 flow. Second operand 11 states and 416 transitions. [2023-11-22 17:16:18,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 66 transitions, 454 flow [2023-11-22 17:16:18,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 66 transitions, 430 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-22 17:16:18,035 INFO L231 Difference]: Finished difference. Result has 100 places, 58 transitions, 356 flow [2023-11-22 17:16:18,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=100, PETRI_TRANSITIONS=58} [2023-11-22 17:16:18,035 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2023-11-22 17:16:18,036 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 58 transitions, 356 flow [2023-11-22 17:16:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 36.69230769230769) internal successors, (954), 26 states have internal predecessors, (954), 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) [2023-11-22 17:16:18,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:18,036 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:18,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:18,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:18,252 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:18,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:18,253 INFO L85 PathProgramCache]: Analyzing trace with hash 544904503, now seen corresponding path program 3 times [2023-11-22 17:16:18,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:18,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250138003] [2023-11-22 17:16:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:18,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 16 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:18,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250138003] [2023-11-22 17:16:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250138003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701068005] [2023-11-22 17:16:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 17:16:18,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:18,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:18,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 17:16:18,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-22 17:16:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:18,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-22 17:16:18,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:18,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-22 17:16:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:18,815 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2023-11-22 17:16:18,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 23 [2023-11-22 17:16:18,838 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-22 17:16:18,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-22 17:16:18,845 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 [2023-11-22 17:16:18,926 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-22 17:16:18,927 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 [2023-11-22 17:16:18,947 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-22 17:16:18,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-22 17:16:19,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 17:16:19,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-22 17:16:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-22 17:16:19,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-22 17:16:20,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701068005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:20,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:20,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-11-22 17:16:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349624395] [2023-11-22 17:16:20,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:20,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 17:16:20,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 17:16:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-11-22 17:16:22,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2023-11-22 17:16:22,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 58 transitions, 356 flow. Second operand has 28 states, 28 states have (on average 28.357142857142858) internal successors, (794), 28 states have internal predecessors, (794), 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) [2023-11-22 17:16:22,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:22,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2023-11-22 17:16:22,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:24,287 INFO L124 PetriNetUnfolderBase]: 48/179 cut-off events. [2023-11-22 17:16:24,287 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2023-11-22 17:16:24,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 179 events. 48/179 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 2 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 537. Up to 45 conditions per place. [2023-11-22 17:16:24,289 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 58 selfloop transitions, 22 changer transitions 0/89 dead transitions. [2023-11-22 17:16:24,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 89 transitions, 577 flow [2023-11-22 17:16:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-22 17:16:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-22 17:16:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 631 transitions. [2023-11-22 17:16:24,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861325115562404 [2023-11-22 17:16:24,290 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 631 transitions. [2023-11-22 17:16:24,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 631 transitions. [2023-11-22 17:16:24,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:24,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 631 transitions. [2023-11-22 17:16:24,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 28.681818181818183) internal successors, (631), 22 states have internal predecessors, (631), 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) [2023-11-22 17:16:24,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 59.0) internal successors, (1357), 23 states have internal predecessors, (1357), 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) [2023-11-22 17:16:24,293 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 59.0) internal successors, (1357), 23 states have internal predecessors, (1357), 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) [2023-11-22 17:16:24,293 INFO L175 Difference]: Start difference. First operand has 100 places, 58 transitions, 356 flow. Second operand 22 states and 631 transitions. [2023-11-22 17:16:24,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 89 transitions, 577 flow [2023-11-22 17:16:24,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 89 transitions, 509 flow, removed 7 selfloop flow, removed 19 redundant places. [2023-11-22 17:16:24,309 INFO L231 Difference]: Finished difference. Result has 101 places, 61 transitions, 323 flow [2023-11-22 17:16:24,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=323, PETRI_PLACES=101, PETRI_TRANSITIONS=61} [2023-11-22 17:16:24,310 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2023-11-22 17:16:24,310 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 61 transitions, 323 flow [2023-11-22 17:16:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.357142857142858) internal successors, (794), 28 states have internal predecessors, (794), 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) [2023-11-22 17:16:24,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:24,311 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:24,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-22 17:16:24,526 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:24,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -409752143, now seen corresponding path program 5 times [2023-11-22 17:16:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045193715] [2023-11-22 17:16:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045193715] [2023-11-22 17:16:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045193715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414494524] [2023-11-22 17:16:24,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 17:16:24,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:24,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:24,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 17:16:25,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-22 17:16:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:25,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 17:16:25,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:25,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 17:16:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:25,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:16:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414494524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:16:25,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:16:25,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-22 17:16:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719184920] [2023-11-22 17:16:25,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:16:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 17:16:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:16:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 17:16:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-11-22 17:16:26,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 59 [2023-11-22 17:16:26,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 61 transitions, 323 flow. Second operand has 29 states, 29 states have (on average 36.55172413793103) internal successors, (1060), 29 states have internal predecessors, (1060), 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) [2023-11-22 17:16:26,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 17:16:26,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 59 [2023-11-22 17:16:26,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 17:16:26,648 INFO L124 PetriNetUnfolderBase]: 20/148 cut-off events. [2023-11-22 17:16:26,648 INFO L125 PetriNetUnfolderBase]: For 268/269 co-relation queries the response was YES. [2023-11-22 17:16:26,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 148 events. 20/148 cut-off events. For 268/269 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 138 event pairs, 5 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 390. Up to 28 conditions per place. [2023-11-22 17:16:26,649 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 31 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2023-11-22 17:16:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 69 transitions, 416 flow [2023-11-22 17:16:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 17:16:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-22 17:16:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 451 transitions. [2023-11-22 17:16:26,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370056497175142 [2023-11-22 17:16:26,650 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 451 transitions. [2023-11-22 17:16:26,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 451 transitions. [2023-11-22 17:16:26,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 17:16:26,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 451 transitions. [2023-11-22 17:16:26,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 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) [2023-11-22 17:16:26,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:26,653 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 59.0) internal successors, (767), 13 states have internal predecessors, (767), 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) [2023-11-22 17:16:26,653 INFO L175 Difference]: Start difference. First operand has 101 places, 61 transitions, 323 flow. Second operand 12 states and 451 transitions. [2023-11-22 17:16:26,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 69 transitions, 416 flow [2023-11-22 17:16:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 69 transitions, 318 flow, removed 10 selfloop flow, removed 22 redundant places. [2023-11-22 17:16:26,655 INFO L231 Difference]: Finished difference. Result has 91 places, 60 transitions, 242 flow [2023-11-22 17:16:26,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=91, PETRI_TRANSITIONS=60} [2023-11-22 17:16:26,656 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2023-11-22 17:16:26,656 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 60 transitions, 242 flow [2023-11-22 17:16:26,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 36.55172413793103) internal successors, (1060), 29 states have internal predecessors, (1060), 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) [2023-11-22 17:16:26,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 17:16:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 17:16:26,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 17:16:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-22 17:16:26,872 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-22 17:16:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 17:16:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 258578664, now seen corresponding path program 6 times [2023-11-22 17:16:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 17:16:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478984170] [2023-11-22 17:16:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 17:16:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 17:16:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 17:16:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 60 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:28,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 17:16:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478984170] [2023-11-22 17:16:28,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478984170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 17:16:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943196101] [2023-11-22 17:16:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 17:16:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 17:16:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 17:16:28,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 17:16:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 17:16:28,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-22 17:16:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 17:16:28,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-22 17:16:28,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 17:16:28,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 17:16:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:28,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:28,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:28,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:29,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:29,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:29,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 17:16:29,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-22 17:16:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 85 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:16:29,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 17:18:35,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28236690 treesize of output 28220306 [2023-11-22 17:20:15,706 WARN L293 SmtUtils]: Spent 1.67m on a formula simplification. DAG size of input: 3186 DAG size of output: 278 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-22 17:20:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 147 refuted. 21 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 17:20:18,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943196101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 17:20:18,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 17:20:18,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 21] total 45 [2023-11-22 17:20:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573802309] [2023-11-22 17:20:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 17:20:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-22 17:20:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 17:20:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-22 17:20:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1588, Unknown=58, NotChecked=0, Total=2070 Killed by 15