./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:32:36,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:32:36,677 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:32:36,683 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:32:36,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:32:36,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:32:36,723 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:32:36,724 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:32:36,725 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:32:36,726 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:32:36,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:32:36,727 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:32:36,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:32:36,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:32:36,731 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:32:36,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:32:36,732 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:32:36,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:32:36,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:32:36,732 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:32:36,733 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:32:36,734 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:32:36,734 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:32:36,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:32:36,735 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:32:36,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:32:36,735 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:32:36,736 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:32:36,736 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:32:36,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:32:36,737 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:32:36,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:32:36,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:32:36,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:32:36,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:32:36,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:32:36,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:32:36,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:32:36,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:32:36,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:32:36,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:32:36,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:32:36,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2024-10-13 12:32:37,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:32:37,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:32:37,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:32:37,037 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:32:37,038 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:32:37,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-10-13 12:32:38,608 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:32:38,890 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:32:38,892 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2024-10-13 12:32:38,916 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cda1836c/fe8414bfc35e4f6caec6f3e79fe4c877/FLAG58669cdf8 [2024-10-13 12:32:38,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cda1836c/fe8414bfc35e4f6caec6f3e79fe4c877 [2024-10-13 12:32:38,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:32:38,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:32:38,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:32:38,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:32:38,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:32:38,944 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:32:38" (1/1) ... [2024-10-13 12:32:38,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c656a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:38, skipping insertion in model container [2024-10-13 12:32:38,945 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:32:38" (1/1) ... [2024-10-13 12:32:38,994 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:32:39,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:32:39,510 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:32:39,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:32:39,632 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:32:39,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39 WrapperNode [2024-10-13 12:32:39,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:32:39,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:32:39,635 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:32:39,635 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:32:39,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,707 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 217 [2024-10-13 12:32:39,708 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:32:39,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:32:39,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:32:39,709 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:32:39,720 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,753 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 5, 2, 11]. 55 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2024-10-13 12:32:39,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:32:39,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:32:39,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:32:39,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:32:39,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (1/1) ... [2024-10-13 12:32:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:32:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:39,832 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) [2024-10-13 12:32:39,836 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 [2024-10-13 12:32:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:32:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:32:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:32:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:32:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:32:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:32:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:32:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:32:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:32:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:32:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:32:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:32:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:32:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-13 12:32:39,888 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-13 12:32:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:32:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:32:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:32:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:32:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:32:39,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:32:39,893 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:32:40,081 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:32:40,084 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:32:40,499 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:32:40,499 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:32:40,762 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:32:40,762 INFO L314 CfgBuilder]: Removed 23 assume(true) statements. [2024-10-13 12:32:40,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:32:40 BoogieIcfgContainer [2024-10-13 12:32:40,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:32:40,768 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:32:40,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:32:40,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:32:40,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:32:38" (1/3) ... [2024-10-13 12:32:40,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc38a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:32:40, skipping insertion in model container [2024-10-13 12:32:40,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:39" (2/3) ... [2024-10-13 12:32:40,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc38a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:32:40, skipping insertion in model container [2024-10-13 12:32:40,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:32:40" (3/3) ... [2024-10-13 12:32:40,780 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2024-10-13 12:32:40,798 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:32:40,798 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-10-13 12:32:40,798 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:32:40,866 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-13 12:32:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 137 transitions, 281 flow [2024-10-13 12:32:40,969 INFO L124 PetriNetUnfolderBase]: 41/207 cut-off events. [2024-10-13 12:32:40,970 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 12:32:40,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 207 events. 41/207 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1059 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2024-10-13 12:32:40,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 137 transitions, 281 flow [2024-10-13 12:32:40,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 137 transitions, 281 flow [2024-10-13 12:32:40,997 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:32:41,004 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;@1ca1bdd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:32:41,004 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-13 12:32:41,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:32:41,008 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:32:41,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:32:41,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:41,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:32:41,010 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:41,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash 18457815, now seen corresponding path program 1 times [2024-10-13 12:32:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:41,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421716001] [2024-10-13 12:32:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:41,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421716001] [2024-10-13 12:32:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421716001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:41,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588762931] [2024-10-13 12:32:41,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:41,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:41,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-13 12:32:41,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:41,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:41,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-13 12:32:41,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:41,791 INFO L124 PetriNetUnfolderBase]: 529/1872 cut-off events. [2024-10-13 12:32:41,792 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-10-13 12:32:41,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1872 events. 529/1872 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14642 event pairs, 480 based on Foata normal form. 378/1985 useless extension candidates. Maximal degree in co-relation 2825. Up to 1049 conditions per place. [2024-10-13 12:32:41,814 INFO L140 encePairwiseOnDemand]: 110/137 looper letters, 49 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-10-13 12:32:41,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 333 flow [2024-10-13 12:32:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2024-10-13 12:32:41,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6301703163017032 [2024-10-13 12:32:41,835 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 281 flow. Second operand 3 states and 259 transitions. [2024-10-13 12:32:41,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 333 flow [2024-10-13 12:32:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:32:41,848 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 241 flow [2024-10-13 12:32:41,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2024-10-13 12:32:41,862 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 1 predicate places. [2024-10-13 12:32:41,862 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 241 flow [2024-10-13 12:32:41,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:41,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:41,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:32:41,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:32:41,863 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:41,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash 572153341, now seen corresponding path program 1 times [2024-10-13 12:32:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:41,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032343165] [2024-10-13 12:32:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:41,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:41,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032343165] [2024-10-13 12:32:41,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032343165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:41,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616122977] [2024-10-13 12:32:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:41,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:41,988 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) [2024-10-13 12:32:41,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:32:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:42,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:32:42,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:42,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:42,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616122977] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:42,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:42,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-13 12:32:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681235678] [2024-10-13 12:32:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:42,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:32:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:32:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:32:42,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-13 12:32:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:42,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:42,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-13 12:32:42,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:42,519 INFO L124 PetriNetUnfolderBase]: 529/1875 cut-off events. [2024-10-13 12:32:42,519 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-10-13 12:32:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1875 events. 529/1875 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14649 event pairs, 480 based on Foata normal form. 0/1610 useless extension candidates. Maximal degree in co-relation 2931. Up to 1049 conditions per place. [2024-10-13 12:32:42,532 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 49 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-10-13 12:32:42,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 361 flow [2024-10-13 12:32:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:32:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:32:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2024-10-13 12:32:42,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5145985401459854 [2024-10-13 12:32:42,536 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 241 flow. Second operand 6 states and 423 transitions. [2024-10-13 12:32:42,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 361 flow [2024-10-13 12:32:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 357 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:42,540 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 273 flow [2024-10-13 12:32:42,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2024-10-13 12:32:42,541 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 8 predicate places. [2024-10-13 12:32:42,543 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 273 flow [2024-10-13 12:32:42,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:42,544 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:42,544 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:42,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:32:42,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:42,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:42,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1743667625, now seen corresponding path program 2 times [2024-10-13 12:32:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:42,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468125557] [2024-10-13 12:32:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 12:32:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:42,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468125557] [2024-10-13 12:32:42,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468125557] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:42,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427331919] [2024-10-13 12:32:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:42,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:42,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2024-10-13 12:32:42,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-10-13 12:32:42,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:42,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2024-10-13 12:32:42,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:43,244 INFO L124 PetriNetUnfolderBase]: 571/1941 cut-off events. [2024-10-13 12:32:43,244 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 12:32:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1941 events. 571/1941 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15084 event pairs, 480 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 3073. Up to 1045 conditions per place. [2024-10-13 12:32:43,259 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 74 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2024-10-13 12:32:43,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 133 transitions, 461 flow [2024-10-13 12:32:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2024-10-13 12:32:43,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961070559610706 [2024-10-13 12:32:43,262 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 273 flow. Second operand 3 states and 245 transitions. [2024-10-13 12:32:43,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 133 transitions, 461 flow [2024-10-13 12:32:43,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 133 transitions, 447 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:43,267 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 259 flow [2024-10-13 12:32:43,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2024-10-13 12:32:43,268 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 7 predicate places. [2024-10-13 12:32:43,268 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 259 flow [2024-10-13 12:32:43,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2024-10-13 12:32:43,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:43,269 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:43,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:32:43,269 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:43,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1743667624, now seen corresponding path program 1 times [2024-10-13 12:32:43,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:43,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532287480] [2024-10-13 12:32:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:43,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532287480] [2024-10-13 12:32:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532287480] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887662794] [2024-10-13 12:32:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:43,380 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) [2024-10-13 12:32:43,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:32:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:43,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:32:43,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:43,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887662794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:43,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-13 12:32:43,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418974890] [2024-10-13 12:32:43,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:43,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:32:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:32:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:32:43,549 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2024-10-13 12:32:43,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 259 flow. Second operand has 12 states, 12 states have (on average 62.083333333333336) internal successors, (745), 12 states have internal predecessors, (745), 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) [2024-10-13 12:32:43,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:43,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2024-10-13 12:32:43,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:43,867 INFO L124 PetriNetUnfolderBase]: 529/1859 cut-off events. [2024-10-13 12:32:43,868 INFO L125 PetriNetUnfolderBase]: For 54/55 co-relation queries the response was YES. [2024-10-13 12:32:43,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2975 conditions, 1859 events. 529/1859 cut-off events. For 54/55 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14379 event pairs, 480 based on Foata normal form. 6/1623 useless extension candidates. Maximal degree in co-relation 2923. Up to 1049 conditions per place. [2024-10-13 12:32:43,880 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 49 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-10-13 12:32:43,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 415 flow [2024-10-13 12:32:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:32:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:32:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 798 transitions. [2024-10-13 12:32:43,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4854014598540146 [2024-10-13 12:32:43,883 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 259 flow. Second operand 12 states and 798 transitions. [2024-10-13 12:32:43,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 415 flow [2024-10-13 12:32:43,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 119 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:32:43,892 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 339 flow [2024-10-13 12:32:43,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=134, PETRI_TRANSITIONS=119} [2024-10-13 12:32:43,895 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 22 predicate places. [2024-10-13 12:32:43,895 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 339 flow [2024-10-13 12:32:43,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.083333333333336) internal successors, (745), 12 states have internal predecessors, (745), 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) [2024-10-13 12:32:43,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:43,896 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-13 12:32:43,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:32:44,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 12:32:44,097 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:44,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1181187224, now seen corresponding path program 2 times [2024-10-13 12:32:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:44,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401956626] [2024-10-13 12:32:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:44,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:44,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401956626] [2024-10-13 12:32:44,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401956626] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:44,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:44,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030006300] [2024-10-13 12:32:44,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:44,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:44,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-10-13 12:32:44,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-10-13 12:32:44,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:44,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-10-13 12:32:44,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:44,616 INFO L124 PetriNetUnfolderBase]: 548/1885 cut-off events. [2024-10-13 12:32:44,616 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-13 12:32:44,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3027 conditions, 1885 events. 548/1885 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14540 event pairs, 432 based on Foata normal form. 1/1659 useless extension candidates. Maximal degree in co-relation 2951. Up to 1055 conditions per place. [2024-10-13 12:32:44,630 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 80 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2024-10-13 12:32:44,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 140 transitions, 545 flow [2024-10-13 12:32:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-10-13 12:32:44,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6180048661800487 [2024-10-13 12:32:44,632 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 339 flow. Second operand 3 states and 254 transitions. [2024-10-13 12:32:44,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 140 transitions, 545 flow [2024-10-13 12:32:44,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 140 transitions, 497 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-13 12:32:44,639 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 301 flow [2024-10-13 12:32:44,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-10-13 12:32:44,641 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 20 predicate places. [2024-10-13 12:32:44,642 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 301 flow [2024-10-13 12:32:44,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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) [2024-10-13 12:32:44,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:44,642 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:32:44,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:32:44,643 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:44,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1746662720, now seen corresponding path program 1 times [2024-10-13 12:32:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:44,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309487790] [2024-10-13 12:32:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:44,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309487790] [2024-10-13 12:32:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309487790] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140607397] [2024-10-13 12:32:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:44,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:44,833 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) [2024-10-13 12:32:44,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:32:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:44,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:32:44,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:44,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:32:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:45,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:45,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140607397] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:45,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:45,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-13 12:32:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210542334] [2024-10-13 12:32:45,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:45,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:32:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:32:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:32:45,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2024-10-13 12:32:45,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 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) [2024-10-13 12:32:45,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:45,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2024-10-13 12:32:45,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:45,416 INFO L124 PetriNetUnfolderBase]: 62/206 cut-off events. [2024-10-13 12:32:45,416 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-10-13 12:32:45,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 206 events. 62/206 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 836 event pairs, 0 based on Foata normal form. 42/236 useless extension candidates. Maximal degree in co-relation 396. Up to 123 conditions per place. [2024-10-13 12:32:45,418 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 57 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-10-13 12:32:45,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 346 flow [2024-10-13 12:32:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:32:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:32:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-10-13 12:32:45,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5237226277372263 [2024-10-13 12:32:45,420 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 301 flow. Second operand 4 states and 287 transitions. [2024-10-13 12:32:45,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 346 flow [2024-10-13 12:32:45,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:32:45,423 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 182 flow [2024-10-13 12:32:45,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-10-13 12:32:45,424 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, -33 predicate places. [2024-10-13 12:32:45,424 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 182 flow [2024-10-13 12:32:45,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 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) [2024-10-13 12:32:45,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:45,425 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 12:32:45,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:32:45,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:45,630 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-13 12:32:45,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1688031202, now seen corresponding path program 1 times [2024-10-13 12:32:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:45,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831913364] [2024-10-13 12:32:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:32:45,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:32:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:32:45,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:32:45,707 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:32:45,708 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-10-13 12:32:45,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-10-13 12:32:45,711 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-10-13 12:32:45,712 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-10-13 12:32:45,712 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-10-13 12:32:45,712 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-10-13 12:32:45,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-10-13 12:32:45,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-10-13 12:32:45,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-10-13 12:32:45,713 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-10-13 12:32:45,714 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-10-13 12:32:45,717 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-10-13 12:32:45,718 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-10-13 12:32:45,719 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-10-13 12:32:45,720 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-10-13 12:32:45,720 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-10-13 12:32:45,720 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-10-13 12:32:45,720 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-10-13 12:32:45,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:32:45,725 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-13 12:32:45,727 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:32:45,728 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:32:45,774 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:32:45,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 198 transitions, 412 flow [2024-10-13 12:32:45,805 INFO L124 PetriNetUnfolderBase]: 69/350 cut-off events. [2024-10-13 12:32:45,805 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:32:45,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 350 events. 69/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2044 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 209. Up to 12 conditions per place. [2024-10-13 12:32:45,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 198 transitions, 412 flow [2024-10-13 12:32:45,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 198 transitions, 412 flow [2024-10-13 12:32:45,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:32:45,815 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;@1ca1bdd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:32:45,815 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-13 12:32:45,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:32:45,817 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:32:45,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:32:45,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:45,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:32:45,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:45,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 24553047, now seen corresponding path program 1 times [2024-10-13 12:32:45,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:45,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973445871] [2024-10-13 12:32:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:45,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:45,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973445871] [2024-10-13 12:32:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973445871] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:45,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:45,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:45,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233884127] [2024-10-13 12:32:45,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:45,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:45,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:45,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-13 12:32:45,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-10-13 12:32:45,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:45,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-13 12:32:45,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:50,647 INFO L124 PetriNetUnfolderBase]: 22727/50777 cut-off events. [2024-10-13 12:32:50,647 INFO L125 PetriNetUnfolderBase]: For 144/163 co-relation queries the response was YES. [2024-10-13 12:32:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84553 conditions, 50777 events. 22727/50777 cut-off events. For 144/163 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 565910 event pairs, 21160 based on Foata normal form. 12589/57492 useless extension candidates. Maximal degree in co-relation 77545. Up to 33663 conditions per place. [2024-10-13 12:32:50,960 INFO L140 encePairwiseOnDemand]: 159/198 looper letters, 71 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-10-13 12:32:50,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 160 transitions, 482 flow [2024-10-13 12:32:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2024-10-13 12:32:50,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6245791245791246 [2024-10-13 12:32:50,963 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 412 flow. Second operand 3 states and 371 transitions. [2024-10-13 12:32:50,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 160 transitions, 482 flow [2024-10-13 12:32:50,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:32:50,968 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 346 flow [2024-10-13 12:32:50,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=161, PETRI_TRANSITIONS=160} [2024-10-13 12:32:50,969 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2024-10-13 12:32:50,970 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 346 flow [2024-10-13 12:32:50,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2024-10-13 12:32:50,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:50,970 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:32:50,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:32:50,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:50,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 761105731, now seen corresponding path program 1 times [2024-10-13 12:32:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423786555] [2024-10-13 12:32:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:51,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423786555] [2024-10-13 12:32:51,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423786555] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428817752] [2024-10-13 12:32:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:51,004 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) [2024-10-13 12:32:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:32:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:51,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:32:51,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:51,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428817752] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:51,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-13 12:32:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732685495] [2024-10-13 12:32:51,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:51,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:32:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:32:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:32:51,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-13 12:32:51,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 88.16666666666667) internal successors, (529), 6 states have internal predecessors, (529), 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) [2024-10-13 12:32:51,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:51,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-13 12:32:51,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:54,657 INFO L124 PetriNetUnfolderBase]: 22727/50780 cut-off events. [2024-10-13 12:32:54,657 INFO L125 PetriNetUnfolderBase]: For 159/178 co-relation queries the response was YES. [2024-10-13 12:32:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84569 conditions, 50780 events. 22727/50780 cut-off events. For 159/178 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 565906 event pairs, 21160 based on Foata normal form. 0/44906 useless extension candidates. Maximal degree in co-relation 84556. Up to 33663 conditions per place. [2024-10-13 12:32:55,008 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 71 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-10-13 12:32:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 163 transitions, 510 flow [2024-10-13 12:32:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:32:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:32:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 601 transitions. [2024-10-13 12:32:55,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5058922558922558 [2024-10-13 12:32:55,014 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 346 flow. Second operand 6 states and 601 transitions. [2024-10-13 12:32:55,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 163 transitions, 510 flow [2024-10-13 12:32:55,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 506 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:55,018 INFO L231 Difference]: Finished difference. Result has 168 places, 163 transitions, 378 flow [2024-10-13 12:32:55,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2024-10-13 12:32:55,020 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 7 predicate places. [2024-10-13 12:32:55,020 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 378 flow [2024-10-13 12:32:55,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.16666666666667) internal successors, (529), 6 states have internal predecessors, (529), 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) [2024-10-13 12:32:55,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:55,022 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:55,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 12:32:55,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:55,227 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:55,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 930021719, now seen corresponding path program 2 times [2024-10-13 12:32:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581710221] [2024-10-13 12:32:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 12:32:55,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581710221] [2024-10-13 12:32:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581710221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:55,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:55,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404922495] [2024-10-13 12:32:55,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:55,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:55,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:55,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2024-10-13 12:32:55,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2024-10-13 12:32:55,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:55,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2024-10-13 12:32:55,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:59,116 INFO L124 PetriNetUnfolderBase]: 24518/53615 cut-off events. [2024-10-13 12:32:59,116 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-10-13 12:32:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90143 conditions, 53615 events. 24518/53615 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 593259 event pairs, 21140 based on Foata normal form. 0/47970 useless extension candidates. Maximal degree in co-relation 90108. Up to 33606 conditions per place. [2024-10-13 12:32:59,657 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 116 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2024-10-13 12:32:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 201 transitions, 690 flow [2024-10-13 12:32:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2024-10-13 12:32:59,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-10-13 12:32:59,660 INFO L175 Difference]: Start difference. First operand has 168 places, 163 transitions, 378 flow. Second operand 3 states and 365 transitions. [2024-10-13 12:32:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 201 transitions, 690 flow [2024-10-13 12:32:59,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 201 transitions, 676 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:59,664 INFO L231 Difference]: Finished difference. Result has 167 places, 161 transitions, 364 flow [2024-10-13 12:32:59,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=167, PETRI_TRANSITIONS=161} [2024-10-13 12:32:59,665 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 6 predicate places. [2024-10-13 12:32:59,665 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 364 flow [2024-10-13 12:32:59,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2024-10-13 12:32:59,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:59,666 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:59,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:32:59,666 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:59,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash 930021720, now seen corresponding path program 1 times [2024-10-13 12:32:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:59,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086485770] [2024-10-13 12:32:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:59,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086485770] [2024-10-13 12:32:59,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086485770] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:59,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330202232] [2024-10-13 12:32:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:59,744 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) [2024-10-13 12:32:59,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:32:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:59,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:32:59,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:59,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330202232] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:59,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:59,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 12:32:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210802560] [2024-10-13 12:32:59,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:59,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:32:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:32:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:32:59,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 198 [2024-10-13 12:32:59,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 364 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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) [2024-10-13 12:32:59,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:59,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 198 [2024-10-13 12:32:59,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:03,660 INFO L124 PetriNetUnfolderBase]: 22727/50543 cut-off events. [2024-10-13 12:33:03,660 INFO L125 PetriNetUnfolderBase]: For 452/471 co-relation queries the response was YES. [2024-10-13 12:33:03,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84842 conditions, 50543 events. 22727/50543 cut-off events. For 452/471 co-relation queries the response was YES. Maximal size of possible extension queue 1511. Compared 560494 event pairs, 21160 based on Foata normal form. 6/44919 useless extension candidates. Maximal degree in co-relation 84789. Up to 33663 conditions per place. [2024-10-13 12:33:03,962 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 71 selfloop transitions, 11 changer transitions 0/167 dead transitions. [2024-10-13 12:33:03,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 564 flow [2024-10-13 12:33:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:33:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:33:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1132 transitions. [2024-10-13 12:33:04,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4764309764309764 [2024-10-13 12:33:04,187 INFO L175 Difference]: Start difference. First operand has 167 places, 161 transitions, 364 flow. Second operand 12 states and 1132 transitions. [2024-10-13 12:33:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 564 flow [2024-10-13 12:33:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 167 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:04,220 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 444 flow [2024-10-13 12:33:04,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=444, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-10-13 12:33:04,221 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-13 12:33:04,221 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 444 flow [2024-10-13 12:33:04,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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) [2024-10-13 12:33:04,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:04,223 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-13 12:33:04,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:33:04,427 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,SelfDestructingSolverStorable10 [2024-10-13 12:33:04,428 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:33:04,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -894879272, now seen corresponding path program 2 times [2024-10-13 12:33:04,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:04,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840474422] [2024-10-13 12:33:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840474422] [2024-10-13 12:33:04,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840474422] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:04,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:04,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224094123] [2024-10-13 12:33:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:04,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:04,567 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2024-10-13 12:33:04,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2024-10-13 12:33:04,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:04,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2024-10-13 12:33:04,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:08,617 INFO L124 PetriNetUnfolderBase]: 23628/53079 cut-off events. [2024-10-13 12:33:08,617 INFO L125 PetriNetUnfolderBase]: For 233/259 co-relation queries the response was YES. [2024-10-13 12:33:08,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88227 conditions, 53079 events. 23628/53079 cut-off events. For 233/259 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 596413 event pairs, 20858 based on Foata normal form. 1/47127 useless extension candidates. Maximal degree in co-relation 88150. Up to 34954 conditions per place. [2024-10-13 12:33:08,996 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 103 selfloop transitions, 2 changer transitions 0/189 dead transitions. [2024-10-13 12:33:08,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 189 transitions, 698 flow [2024-10-13 12:33:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:33:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:33:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2024-10-13 12:33:08,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976430976430976 [2024-10-13 12:33:08,998 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 444 flow. Second operand 3 states and 355 transitions. [2024-10-13 12:33:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 189 transitions, 698 flow [2024-10-13 12:33:09,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 189 transitions, 650 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-13 12:33:09,004 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 410 flow [2024-10-13 12:33:09,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-10-13 12:33:09,005 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-10-13 12:33:09,005 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 410 flow [2024-10-13 12:33:09,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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) [2024-10-13 12:33:09,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:09,005 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:09,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:33:09,005 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:33:09,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2130508645, now seen corresponding path program 1 times [2024-10-13 12:33:09,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:09,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806690398] [2024-10-13 12:33:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806690398] [2024-10-13 12:33:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806690398] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:33:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880755643] [2024-10-13 12:33:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:33:09,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:33:09,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 12:33:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:09,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:33:09,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:33:09,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:33:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:09,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:33:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880755643] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:33:09,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:33:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 12:33:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513332806] [2024-10-13 12:33:09,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:33:09,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:33:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:33:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:33:09,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-10-13 12:33:09,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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) [2024-10-13 12:33:09,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:09,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-10-13 12:33:09,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:13,681 INFO L124 PetriNetUnfolderBase]: 22571/49376 cut-off events. [2024-10-13 12:33:13,681 INFO L125 PetriNetUnfolderBase]: For 1101/1122 co-relation queries the response was YES. [2024-10-13 12:33:13,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84399 conditions, 49376 events. 22571/49376 cut-off events. For 1101/1122 co-relation queries the response was YES. Maximal size of possible extension queue 1548. Compared 549749 event pairs, 2671 based on Foata normal form. 483/45213 useless extension candidates. Maximal degree in co-relation 84345. Up to 29099 conditions per place. [2024-10-13 12:33:13,975 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 184 selfloop transitions, 4 changer transitions 0/271 dead transitions. [2024-10-13 12:33:13,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 271 transitions, 990 flow [2024-10-13 12:33:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:33:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:33:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2024-10-13 12:33:13,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6121212121212121 [2024-10-13 12:33:13,977 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 410 flow. Second operand 5 states and 606 transitions. [2024-10-13 12:33:13,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 271 transitions, 990 flow [2024-10-13 12:33:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 271 transitions, 988 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:33:13,983 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 412 flow [2024-10-13 12:33:13,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-10-13 12:33:13,984 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-13 12:33:13,984 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 412 flow [2024-10-13 12:33:13,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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) [2024-10-13 12:33:13,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:13,985 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:33:13,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 12:33:14,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:33:14,186 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:33:14,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2117810536, now seen corresponding path program 1 times [2024-10-13 12:33:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:14,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237311191] [2024-10-13 12:33:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:14,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:14,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237311191] [2024-10-13 12:33:14,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237311191] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:14,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:14,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:33:14,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373296374] [2024-10-13 12:33:14,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:14,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:33:14,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:33:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:33:14,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 198 [2024-10-13 12:33:14,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2024-10-13 12:33:14,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:14,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 198 [2024-10-13 12:33:14,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:18,755 INFO L124 PetriNetUnfolderBase]: 24514/49987 cut-off events. [2024-10-13 12:33:18,756 INFO L125 PetriNetUnfolderBase]: For 2913/2913 co-relation queries the response was YES. [2024-10-13 12:33:18,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88862 conditions, 49987 events. 24514/49987 cut-off events. For 2913/2913 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 527993 event pairs, 609 based on Foata normal form. 0/47930 useless extension candidates. Maximal degree in co-relation 88808. Up to 31250 conditions per place. [2024-10-13 12:33:19,092 INFO L140 encePairwiseOnDemand]: 180/198 looper letters, 202 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2024-10-13 12:33:19,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 1086 flow [2024-10-13 12:33:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:33:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:33:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2024-10-13 12:33:19,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597979797979798 [2024-10-13 12:33:19,094 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 412 flow. Second operand 5 states and 592 transitions. [2024-10-13 12:33:19,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 1086 flow [2024-10-13 12:33:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 1069 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-13 12:33:19,101 INFO L231 Difference]: Finished difference. Result has 182 places, 169 transitions, 470 flow [2024-10-13 12:33:19,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=470, PETRI_PLACES=182, PETRI_TRANSITIONS=169} [2024-10-13 12:33:19,102 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-13 12:33:19,102 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 169 transitions, 470 flow [2024-10-13 12:33:19,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 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) [2024-10-13 12:33:19,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:19,103 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-13 12:33:19,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:33:19,103 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:33:19,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1339507982, now seen corresponding path program 1 times [2024-10-13 12:33:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:19,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868500294] [2024-10-13 12:33:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:33:19,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:33:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:33:19,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:33:19,146 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:33:19,146 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-13 12:33:19,146 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-13 12:33:19,146 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-13 12:33:19,146 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-13 12:33:19,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-13 12:33:19,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-13 12:33:19,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-13 12:33:19,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-13 12:33:19,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-13 12:33:19,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-13 12:33:19,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-13 12:33:19,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-13 12:33:19,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-13 12:33:19,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 12:33:19,153 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-10-13 12:33:19,154 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:33:19,154 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:33:19,211 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 12:33:19,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 259 transitions, 545 flow [2024-10-13 12:33:19,261 INFO L124 PetriNetUnfolderBase]: 100/514 cut-off events. [2024-10-13 12:33:19,261 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-13 12:33:19,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 514 events. 100/514 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3156 event pairs, 1 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 359. Up to 16 conditions per place. [2024-10-13 12:33:19,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 259 transitions, 545 flow [2024-10-13 12:33:19,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 259 transitions, 545 flow [2024-10-13 12:33:19,279 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:33:19,280 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;@1ca1bdd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:33:19,280 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-13 12:33:19,283 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:33:19,284 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:33:19,284 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:33:19,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:19,284 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:33:19,284 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:33:19,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 32526103, now seen corresponding path program 1 times [2024-10-13 12:33:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:19,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964966316] [2024-10-13 12:33:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:33:19,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:19,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964966316] [2024-10-13 12:33:19,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964966316] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:19,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:19,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578823718] [2024-10-13 12:33:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:19,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:19,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:19,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-13 12:33:19,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 259 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:19,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:19,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-13 12:33:19,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand