./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:17:06,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:17:06,955 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:17:06,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:17:06,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:17:06,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:17:06,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:17:06,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:17:06,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:17:06,995 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:17:06,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:17:06,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:17:06,998 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:17:07,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:17:07,000 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:17:07,000 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:17:07,001 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:17:07,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:17:07,001 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:17:07,001 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:17:07,002 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:17:07,005 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:17:07,005 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:17:07,005 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:17:07,005 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:17:07,006 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:17:07,006 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:17:07,006 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:17:07,007 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:17:07,007 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:17:07,007 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:17:07,007 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:17:07,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:17:07,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:07,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:17:07,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:17:07,009 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:17:07,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:17:07,010 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:17:07,010 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:17:07,011 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:17:07,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:17:07,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-11-10 18:17:07,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:17:07,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:17:07,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:17:07,297 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:17:07,297 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:17:07,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-10 18:17:08,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:17:09,041 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:17:09,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-10 18:17:09,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99dc43adb/8e8bc22e26fa4995921fc5799e65a54a/FLAG92f479a0c [2024-11-10 18:17:09,066 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99dc43adb/8e8bc22e26fa4995921fc5799e65a54a [2024-11-10 18:17:09,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:17:09,070 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:17:09,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:09,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:17:09,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:17:09,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7c3a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09, skipping insertion in model container [2024-11-10 18:17:09,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,107 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:17:09,354 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:17:09,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:09,373 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:17:09,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:09,421 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:17:09,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09 WrapperNode [2024-11-10 18:17:09,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:09,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:09,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:17:09,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:17:09,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,476 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 303 [2024-11-10 18:17:09,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:09,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:17:09,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:17:09,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:17:09,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,498 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,534 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 18:17:09,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,539 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,554 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:17:09,563 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:17:09,563 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:17:09,564 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:17:09,565 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (1/1) ... [2024-11-10 18:17:09,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:09,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:17:09,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:17:09,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:17:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:17:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:17:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:17:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:17:09,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:17:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 18:17:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:17:09,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:17:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:17:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:17:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:17:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:17:09,703 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:17:09,854 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:17:09,856 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:17:10,338 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:17:10,339 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:17:10,717 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:17:10,717 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:17:10,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:10 BoogieIcfgContainer [2024-11-10 18:17:10,718 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:17:10,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:17:10,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:17:10,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:17:10,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:17:09" (1/3) ... [2024-11-10 18:17:10,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66520d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:10, skipping insertion in model container [2024-11-10 18:17:10,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:09" (2/3) ... [2024-11-10 18:17:10,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66520d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:10, skipping insertion in model container [2024-11-10 18:17:10,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:10" (3/3) ... [2024-11-10 18:17:10,730 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-11-10 18:17:10,750 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:17:10,751 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-10 18:17:10,751 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:17:10,838 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 18:17:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 192 flow [2024-11-10 18:17:10,961 INFO L124 PetriNetUnfolderBase]: 12/78 cut-off events. [2024-11-10 18:17:10,962 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:17:10,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 78 events. 12/78 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 62. Up to 2 conditions per place. [2024-11-10 18:17:10,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 192 flow [2024-11-10 18:17:10,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 178 flow [2024-11-10 18:17:10,986 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:17:10,995 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@605d81c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:17:10,996 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-10 18:17:11,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:17:11,000 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:17:11,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:17:11,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:11,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:11,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:11,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 25443159, now seen corresponding path program 1 times [2024-11-10 18:17:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:11,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128091510] [2024-11-10 18:17:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:11,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128091510] [2024-11-10 18:17:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128091510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:17:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530374718] [2024-11-10 18:17:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:11,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:11,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:11,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:11,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:11,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:11,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:13,615 INFO L124 PetriNetUnfolderBase]: 11253/15669 cut-off events. [2024-11-10 18:17:13,616 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2024-11-10 18:17:13,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31078 conditions, 15669 events. 11253/15669 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 104395 event pairs, 9160 based on Foata normal form. 2094/12393 useless extension candidates. Maximal degree in co-relation 28816. Up to 14621 conditions per place. [2024-11-10 18:17:13,803 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 42 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-10 18:17:13,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 246 flow [2024-11-10 18:17:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-10 18:17:13,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-11-10 18:17:13,822 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 178 flow. Second operand 3 states and 137 transitions. [2024-11-10 18:17:13,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 246 flow [2024-11-10 18:17:13,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 230 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 18:17:13,859 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 146 flow [2024-11-10 18:17:13,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-11-10 18:17:13,868 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2024-11-10 18:17:13,869 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 146 flow [2024-11-10 18:17:13,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:13,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:13,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:13,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:17:13,870 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:13,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:13,871 INFO L85 PathProgramCache]: Analyzing trace with hash 25443160, now seen corresponding path program 1 times [2024-11-10 18:17:13,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:13,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688447107] [2024-11-10 18:17:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:14,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688447107] [2024-11-10 18:17:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688447107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:14,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694304984] [2024-11-10 18:17:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:14,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:14,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:16,137 INFO L124 PetriNetUnfolderBase]: 11254/15674 cut-off events. [2024-11-10 18:17:16,138 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:17:16,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30569 conditions, 15674 events. 11254/15674 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 104073 event pairs, 9160 based on Foata normal form. 0/10302 useless extension candidates. Maximal degree in co-relation 30534. Up to 14630 conditions per place. [2024-11-10 18:17:16,279 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 45 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-11-10 18:17:16,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 250 flow [2024-11-10 18:17:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-11-10 18:17:16,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-11-10 18:17:16,286 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 146 flow. Second operand 4 states and 162 transitions. [2024-11-10 18:17:16,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 250 flow [2024-11-10 18:17:16,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:16,291 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 169 flow [2024-11-10 18:17:16,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-11-10 18:17:16,292 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2024-11-10 18:17:16,292 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 169 flow [2024-11-10 18:17:16,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:16,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:16,293 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:17:16,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:17:16,294 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:16,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2063741467, now seen corresponding path program 1 times [2024-11-10 18:17:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:16,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301273604] [2024-11-10 18:17:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:16,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301273604] [2024-11-10 18:17:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301273604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374453067] [2024-11-10 18:17:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:16,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:16,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:16,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:17:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:16,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:17:16,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:16,830 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 10 treesize of output 9 [2024-11-10 18:17:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:17,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374453067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:17,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:17:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963582359] [2024-11-10 18:17:17,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:17,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:17:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:17:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:17:17,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-10 18:17:17,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 169 flow. Second operand has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:17,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:17,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-10 18:17:17,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:19,375 INFO L124 PetriNetUnfolderBase]: 11254/15673 cut-off events. [2024-11-10 18:17:19,376 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:17:19,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30580 conditions, 15673 events. 11254/15673 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 104032 event pairs, 9160 based on Foata normal form. 0/10301 useless extension candidates. Maximal degree in co-relation 30555. Up to 14626 conditions per place. [2024-11-10 18:17:19,524 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 42 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-11-10 18:17:19,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 269 flow [2024-11-10 18:17:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:17:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:17:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2024-11-10 18:17:19,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-11-10 18:17:19,528 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 169 flow. Second operand 7 states and 234 transitions. [2024-11-10 18:17:19,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 269 flow [2024-11-10 18:17:19,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:19,531 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 180 flow [2024-11-10 18:17:19,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-11-10 18:17:19,532 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-11-10 18:17:19,532 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 180 flow [2024-11-10 18:17:19,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.363636363636363) internal successors, (301), 11 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:19,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:19,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:19,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:19,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:19,734 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:19,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2063401289, now seen corresponding path program 1 times [2024-11-10 18:17:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:19,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781817638] [2024-11-10 18:17:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:19,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:19,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781817638] [2024-11-10 18:17:19,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781817638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:19,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:19,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:19,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829536342] [2024-11-10 18:17:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:19,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:19,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:19,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:19,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:19,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:19,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:21,908 INFO L124 PetriNetUnfolderBase]: 11255/15678 cut-off events. [2024-11-10 18:17:21,909 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-10 18:17:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30594 conditions, 15678 events. 11255/15678 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 104226 event pairs, 9160 based on Foata normal form. 0/10307 useless extension candidates. Maximal degree in co-relation 30566. Up to 14628 conditions per place. [2024-11-10 18:17:22,043 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 44 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-10 18:17:22,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 290 flow [2024-11-10 18:17:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-11-10 18:17:22,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-11-10 18:17:22,045 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 180 flow. Second operand 5 states and 192 transitions. [2024-11-10 18:17:22,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 290 flow [2024-11-10 18:17:22,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 261 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:17:22,051 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 190 flow [2024-11-10 18:17:22,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-10 18:17:22,052 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2024-11-10 18:17:22,052 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 190 flow [2024-11-10 18:17:22,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:22,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:22,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:22,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:17:22,053 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:22,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1216653773, now seen corresponding path program 1 times [2024-11-10 18:17:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:22,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643443372] [2024-11-10 18:17:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:22,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643443372] [2024-11-10 18:17:22,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643443372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740106852] [2024-11-10 18:17:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:22,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:22,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:22,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:17:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:22,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 18:17:22,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:22,489 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 10 treesize of output 9 [2024-11-10 18:17:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:22,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740106852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:22,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-10 18:17:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223066627] [2024-11-10 18:17:22,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:22,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:17:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:17:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:17:23,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-10 18:17:23,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:23,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:23,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-10 18:17:23,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:24,669 INFO L124 PetriNetUnfolderBase]: 11257/15687 cut-off events. [2024-11-10 18:17:24,669 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:17:24,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30618 conditions, 15687 events. 11257/15687 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 104054 event pairs, 9160 based on Foata normal form. 0/10353 useless extension candidates. Maximal degree in co-relation 30550. Up to 14622 conditions per place. [2024-11-10 18:17:24,788 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 44 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-11-10 18:17:24,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 342 flow [2024-11-10 18:17:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:17:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:17:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-10 18:17:24,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-11-10 18:17:24,791 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 190 flow. Second operand 9 states and 298 transitions. [2024-11-10 18:17:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 342 flow [2024-11-10 18:17:24,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:24,795 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 240 flow [2024-11-10 18:17:24,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=240, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-10 18:17:24,796 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-10 18:17:24,796 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 240 flow [2024-11-10 18:17:24,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.46153846153846) internal successors, (357), 13 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:24,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:24,797 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:24,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:17:25,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:25,002 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:25,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash -175333161, now seen corresponding path program 1 times [2024-11-10 18:17:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:25,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5048466] [2024-11-10 18:17:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:25,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:25,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5048466] [2024-11-10 18:17:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5048466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113213840] [2024-11-10 18:17:25,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:25,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:25,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:25,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:25,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:25,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:26,601 INFO L124 PetriNetUnfolderBase]: 13736/19416 cut-off events. [2024-11-10 18:17:26,602 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-10 18:17:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37878 conditions, 19416 events. 13736/19416 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 133777 event pairs, 11357 based on Foata normal form. 522/14094 useless extension candidates. Maximal degree in co-relation 30569. Up to 14641 conditions per place. [2024-11-10 18:17:26,719 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 94 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2024-11-10 18:17:26,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 566 flow [2024-11-10 18:17:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-10 18:17:26,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-11-10 18:17:26,721 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 240 flow. Second operand 5 states and 233 transitions. [2024-11-10 18:17:26,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 566 flow [2024-11-10 18:17:26,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 513 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-10 18:17:26,725 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 253 flow [2024-11-10 18:17:26,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-11-10 18:17:26,726 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-10 18:17:26,726 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 253 flow [2024-11-10 18:17:26,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:26,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:26,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:26,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:17:26,727 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:26,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 623313942, now seen corresponding path program 1 times [2024-11-10 18:17:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:26,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188736206] [2024-11-10 18:17:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:26,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:26,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:26,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188736206] [2024-11-10 18:17:26,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188736206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:26,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:26,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780632940] [2024-11-10 18:17:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:26,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:26,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:26,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:26,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:26,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:26,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:26,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:28,178 INFO L124 PetriNetUnfolderBase]: 9806/14062 cut-off events. [2024-11-10 18:17:28,178 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2024-11-10 18:17:28,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29597 conditions, 14062 events. 9806/14062 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 94956 event pairs, 7927 based on Foata normal form. 0/10189 useless extension candidates. Maximal degree in co-relation 24327. Up to 12896 conditions per place. [2024-11-10 18:17:28,244 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 51 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-11-10 18:17:28,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 361 flow [2024-11-10 18:17:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-10 18:17:28,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-11-10 18:17:28,246 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 253 flow. Second operand 4 states and 156 transitions. [2024-11-10 18:17:28,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 361 flow [2024-11-10 18:17:28,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:28,250 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 257 flow [2024-11-10 18:17:28,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-11-10 18:17:28,251 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-10 18:17:28,251 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 257 flow [2024-11-10 18:17:28,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:28,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:28,251 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:28,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:17:28,251 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:28,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash 623313943, now seen corresponding path program 1 times [2024-11-10 18:17:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608944862] [2024-11-10 18:17:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:28,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:28,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608944862] [2024-11-10 18:17:28,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608944862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:28,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:28,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:28,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882558262] [2024-11-10 18:17:28,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:28,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:28,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:28,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:28,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:28,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:28,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:28,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:28,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:29,802 INFO L124 PetriNetUnfolderBase]: 13003/19225 cut-off events. [2024-11-10 18:17:29,803 INFO L125 PetriNetUnfolderBase]: For 1082/1082 co-relation queries the response was YES. [2024-11-10 18:17:29,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40341 conditions, 19225 events. 13003/19225 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 140271 event pairs, 10818 based on Foata normal form. 533/15096 useless extension candidates. Maximal degree in co-relation 33164. Up to 12919 conditions per place. [2024-11-10 18:17:29,895 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 81 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2024-11-10 18:17:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 515 flow [2024-11-10 18:17:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-11-10 18:17:29,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-11-10 18:17:29,897 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 257 flow. Second operand 5 states and 221 transitions. [2024-11-10 18:17:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 515 flow [2024-11-10 18:17:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:29,903 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 287 flow [2024-11-10 18:17:29,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2024-11-10 18:17:29,904 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-10 18:17:29,904 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 287 flow [2024-11-10 18:17:29,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:29,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:29,905 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:29,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:17:29,905 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:29,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2136249716, now seen corresponding path program 1 times [2024-11-10 18:17:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086062126] [2024-11-10 18:17:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086062126] [2024-11-10 18:17:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086062126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937651269] [2024-11-10 18:17:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:30,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:30,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:30,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:17:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:30,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:17:30,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:30,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:17:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:17:30,423 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 18 treesize of output 13 [2024-11-10 18:17:30,437 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:17:30,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:17:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:30,479 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:17:30,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937651269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:30,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:17:30,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-10 18:17:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009170024] [2024-11-10 18:17:30,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:30,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:17:30,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:17:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:17:30,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 82 [2024-11-10 18:17:30,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:30,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 82 [2024-11-10 18:17:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:32,015 INFO L124 PetriNetUnfolderBase]: 9866/14710 cut-off events. [2024-11-10 18:17:32,015 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2024-11-10 18:17:32,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31925 conditions, 14710 events. 9866/14710 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 104928 event pairs, 8104 based on Foata normal form. 0/11508 useless extension candidates. Maximal degree in co-relation 24262. Up to 13263 conditions per place. [2024-11-10 18:17:32,088 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 54 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-10 18:17:32,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 395 flow [2024-11-10 18:17:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-11-10 18:17:32,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-11-10 18:17:32,090 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 287 flow. Second operand 4 states and 148 transitions. [2024-11-10 18:17:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 395 flow [2024-11-10 18:17:32,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:32,095 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 282 flow [2024-11-10 18:17:32,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-11-10 18:17:32,096 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-10 18:17:32,096 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 282 flow [2024-11-10 18:17:32,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:32,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:32,096 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:32,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:32,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:32,301 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:32,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2136249715, now seen corresponding path program 1 times [2024-11-10 18:17:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:32,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225824929] [2024-11-10 18:17:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225824929] [2024-11-10 18:17:32,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225824929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:32,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:32,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788058272] [2024-11-10 18:17:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:32,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:32,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:32,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:32,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:32,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:32,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:33,215 INFO L124 PetriNetUnfolderBase]: 7273/10971 cut-off events. [2024-11-10 18:17:33,215 INFO L125 PetriNetUnfolderBase]: For 1385/1385 co-relation queries the response was YES. [2024-11-10 18:17:33,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23194 conditions, 10971 events. 7273/10971 cut-off events. For 1385/1385 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 75995 event pairs, 5890 based on Foata normal form. 0/9204 useless extension candidates. Maximal degree in co-relation 15535. Up to 9831 conditions per place. [2024-11-10 18:17:33,267 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 44 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2024-11-10 18:17:33,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 378 flow [2024-11-10 18:17:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-10 18:17:33,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-11-10 18:17:33,269 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 282 flow. Second operand 5 states and 180 transitions. [2024-11-10 18:17:33,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 378 flow [2024-11-10 18:17:33,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 75 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:33,273 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 285 flow [2024-11-10 18:17:33,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-11-10 18:17:33,274 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-10 18:17:33,274 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 285 flow [2024-11-10 18:17:33,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 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) [2024-11-10 18:17:33,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:33,274 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:33,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:17:33,274 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:33,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -674240357, now seen corresponding path program 1 times [2024-11-10 18:17:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:33,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042720675] [2024-11-10 18:17:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042720675] [2024-11-10 18:17:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042720675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:33,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:33,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 18:17:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297455252] [2024-11-10 18:17:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:33,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:17:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:17:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:17:33,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:33,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:33,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:33,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:33,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:34,144 INFO L124 PetriNetUnfolderBase]: 5447/8431 cut-off events. [2024-11-10 18:17:34,144 INFO L125 PetriNetUnfolderBase]: For 1124/1124 co-relation queries the response was YES. [2024-11-10 18:17:34,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17299 conditions, 8431 events. 5447/8431 cut-off events. For 1124/1124 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 58141 event pairs, 4350 based on Foata normal form. 0/7450 useless extension candidates. Maximal degree in co-relation 11581. Up to 7419 conditions per place. [2024-11-10 18:17:34,186 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 45 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-11-10 18:17:34,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 73 transitions, 385 flow [2024-11-10 18:17:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-10 18:17:34,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-11-10 18:17:34,188 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 285 flow. Second operand 5 states and 180 transitions. [2024-11-10 18:17:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 73 transitions, 385 flow [2024-11-10 18:17:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 373 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:34,191 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 283 flow [2024-11-10 18:17:34,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-11-10 18:17:34,192 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2024-11-10 18:17:34,192 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 283 flow [2024-11-10 18:17:34,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:34,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:34,192 INFO L204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:34,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 18:17:34,193 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:34,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash -180620337, now seen corresponding path program 1 times [2024-11-10 18:17:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:34,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336575077] [2024-11-10 18:17:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336575077] [2024-11-10 18:17:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336575077] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:34,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734664434] [2024-11-10 18:17:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:34,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:34,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 82 [2024-11-10 18:17:34,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:34,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:34,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 82 [2024-11-10 18:17:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:35,273 INFO L124 PetriNetUnfolderBase]: 6336/10369 cut-off events. [2024-11-10 18:17:35,273 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-11-10 18:17:35,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20869 conditions, 10369 events. 6336/10369 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 74511 event pairs, 743 based on Foata normal form. 484/10602 useless extension candidates. Maximal degree in co-relation 17318. Up to 5212 conditions per place. [2024-11-10 18:17:35,315 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 81 selfloop transitions, 6 changer transitions 4/112 dead transitions. [2024-11-10 18:17:35,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 561 flow [2024-11-10 18:17:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-10 18:17:35,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-11-10 18:17:35,316 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 283 flow. Second operand 5 states and 222 transitions. [2024-11-10 18:17:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 561 flow [2024-11-10 18:17:35,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 547 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:35,320 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 255 flow [2024-11-10 18:17:35,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2024-11-10 18:17:35,321 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2024-11-10 18:17:35,321 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 255 flow [2024-11-10 18:17:35,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:35,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:35,321 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:35,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:17:35,321 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:35,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1894243886, now seen corresponding path program 1 times [2024-11-10 18:17:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146723523] [2024-11-10 18:17:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:17:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146723523] [2024-11-10 18:17:35,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146723523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:35,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758918597] [2024-11-10 18:17:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:35,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:35,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 82 [2024-11-10 18:17:35,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:35,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:35,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 82 [2024-11-10 18:17:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:36,738 INFO L124 PetriNetUnfolderBase]: 7841/11963 cut-off events. [2024-11-10 18:17:36,738 INFO L125 PetriNetUnfolderBase]: For 5481/5737 co-relation queries the response was YES. [2024-11-10 18:17:36,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27149 conditions, 11963 events. 7841/11963 cut-off events. For 5481/5737 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 80590 event pairs, 1018 based on Foata normal form. 352/12218 useless extension candidates. Maximal degree in co-relation 27100. Up to 7307 conditions per place. [2024-11-10 18:17:36,843 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 92 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2024-11-10 18:17:36,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 612 flow [2024-11-10 18:17:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 264 transitions. [2024-11-10 18:17:36,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-10 18:17:36,845 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 255 flow. Second operand 6 states and 264 transitions. [2024-11-10 18:17:36,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 612 flow [2024-11-10 18:17:36,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 590 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-10 18:17:36,851 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 302 flow [2024-11-10 18:17:36,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2024-11-10 18:17:36,851 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-11-10 18:17:36,852 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 302 flow [2024-11-10 18:17:36,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:36,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:36,852 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:36,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:17:36,852 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:36,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2045432920, now seen corresponding path program 2 times [2024-11-10 18:17:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:36,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446076305] [2024-11-10 18:17:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446076305] [2024-11-10 18:17:37,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446076305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109979294] [2024-11-10 18:17:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:17:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:37,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:37,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:17:37,196 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:17:37,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:17:37,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 18:17:37,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:37,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109979294] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:37,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:17:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-10 18:17:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529815332] [2024-11-10 18:17:37,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:37,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-10 18:17:37,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:37,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:37,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:37,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:37,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:39,441 INFO L124 PetriNetUnfolderBase]: 14878/21907 cut-off events. [2024-11-10 18:17:39,441 INFO L125 PetriNetUnfolderBase]: For 14570/15146 co-relation queries the response was YES. [2024-11-10 18:17:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 21907 events. 14878/21907 cut-off events. For 14570/15146 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 151880 event pairs, 2659 based on Foata normal form. 224/21565 useless extension candidates. Maximal degree in co-relation 54373. Up to 5247 conditions per place. [2024-11-10 18:17:39,681 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 104 selfloop transitions, 16 changer transitions 0/140 dead transitions. [2024-11-10 18:17:39,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 140 transitions, 740 flow [2024-11-10 18:17:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 270 transitions. [2024-11-10 18:17:39,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-11-10 18:17:39,682 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 302 flow. Second operand 6 states and 270 transitions. [2024-11-10 18:17:39,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 140 transitions, 740 flow [2024-11-10 18:17:39,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 724 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:39,702 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 406 flow [2024-11-10 18:17:39,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2024-11-10 18:17:39,703 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-10 18:17:39,703 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 406 flow [2024-11-10 18:17:39,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:39,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:39,703 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:39,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:39,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:39,904 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:39,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -458434302, now seen corresponding path program 1 times [2024-11-10 18:17:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:39,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063936236] [2024-11-10 18:17:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:40,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063936236] [2024-11-10 18:17:40,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063936236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144758704] [2024-11-10 18:17:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:40,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:40,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:40,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:17:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:40,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:17:40,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:40,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-10 18:17:41,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 18:17:41,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-10 18:17:41,271 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 [2024-11-10 18:17:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:41,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:41,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-10 18:17:41,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-10 18:17:42,231 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 39 treesize of output 35 [2024-11-10 18:17:42,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-10 18:17:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:42,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144758704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:42,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:42,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-11-10 18:17:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119563849] [2024-11-10 18:17:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:42,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 18:17:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 18:17:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-10 18:17:42,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 82 [2024-11-10 18:17:42,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 406 flow. Second operand has 20 states, 20 states have (on average 32.3) internal successors, (646), 20 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:42,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:42,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 82 [2024-11-10 18:17:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:48,178 INFO L124 PetriNetUnfolderBase]: 28888/47261 cut-off events. [2024-11-10 18:17:48,178 INFO L125 PetriNetUnfolderBase]: For 73227/75177 co-relation queries the response was YES. [2024-11-10 18:17:48,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130055 conditions, 47261 events. 28888/47261 cut-off events. For 73227/75177 co-relation queries the response was YES. Maximal size of possible extension queue 2233. Compared 416354 event pairs, 2870 based on Foata normal form. 283/46766 useless extension candidates. Maximal degree in co-relation 77675. Up to 15623 conditions per place. [2024-11-10 18:17:48,842 INFO L140 encePairwiseOnDemand]: 70/82 looper letters, 202 selfloop transitions, 52 changer transitions 4/279 dead transitions. [2024-11-10 18:17:48,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 279 transitions, 1775 flow [2024-11-10 18:17:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 18:17:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 18:17:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 749 transitions. [2024-11-10 18:17:48,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48074454428754815 [2024-11-10 18:17:48,846 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 406 flow. Second operand 19 states and 749 transitions. [2024-11-10 18:17:48,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 279 transitions, 1775 flow [2024-11-10 18:17:49,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 279 transitions, 1734 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:49,247 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 870 flow [2024-11-10 18:17:49,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=870, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-11-10 18:17:49,248 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 38 predicate places. [2024-11-10 18:17:49,248 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 870 flow [2024-11-10 18:17:49,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 32.3) internal successors, (646), 20 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:49,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:49,249 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:49,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:17:49,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:17:49,454 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-10 18:17:49,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1249619331, now seen corresponding path program 1 times [2024-11-10 18:17:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65872660] [2024-11-10 18:17:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat