./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_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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_77-tricky_address4_racing.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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:12:00,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:12:00,726 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:12:00,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:12:00,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:12:00,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:12:00,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:12:00,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:12:00,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:12:00,767 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:12:00,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:12:00,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:12:00,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:12:00,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:12:00,770 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:12:00,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:12:00,771 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:12:00,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:12:00,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:12:00,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:12:00,772 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:12:00,776 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:12:00,777 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:12:00,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:12:00,777 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:12:00,778 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:12:00,778 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:12:00,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:12:00,778 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:12:00,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:12:00,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:12:00,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:12:00,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:12:00,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:12:00,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:12:00,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:12:00,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:12:00,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:12:00,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:12:00,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:12:00,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:12:00,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:12:00,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2024-10-24 19:12:01,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:12:01,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:12:01,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:12:01,104 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:12:01,104 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:12:01,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2024-10-24 19:12:02,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:12:02,915 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:12:02,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2024-10-24 19:12:02,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12d624ae/b8ae388ca3ca46a5a5430ecda3089e96/FLAG525621d51 [2024-10-24 19:12:03,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12d624ae/b8ae388ca3ca46a5a5430ecda3089e96 [2024-10-24 19:12:03,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:12:03,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:12:03,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:12:03,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:12:03,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:12:03,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:12:03" (1/1) ... [2024-10-24 19:12:03,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68062c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:03, skipping insertion in model container [2024-10-24 19:12:03,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:12:03" (1/1) ... [2024-10-24 19:12:03,261 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:12:03,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:12:03,898 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:12:03,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:12:04,037 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:12:04,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04 WrapperNode [2024-10-24 19:12:04,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:12:04,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:12:04,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:12:04,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:12:04,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,114 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 220 [2024-10-24 19:12:04,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:12:04,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:12:04,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:12:04,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:12:04,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,160 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]. [2024-10-24 19:12:04,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,173 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:12:04,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:12:04,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:12:04,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:12:04,203 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (1/1) ... [2024-10-24 19:12:04,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:12:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:04,242 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) [2024-10-24 19:12:04,244 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 [2024-10-24 19:12:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 19:12:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 19:12:04,298 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:12:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:12:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:12:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:12:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 19:12:04,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:12:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:12:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:12:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 19:12:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:12:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:12:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:12:04,302 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 19:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 19:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:12:04,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:12:04,305 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:12:04,496 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:12:04,498 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:12:04,918 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:12:04,918 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:12:05,094 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:12:05,095 INFO L314 CfgBuilder]: Removed 23 assume(true) statements. [2024-10-24 19:12:05,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:12:05 BoogieIcfgContainer [2024-10-24 19:12:05,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:12:05,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:12:05,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:12:05,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:12:05,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:12:03" (1/3) ... [2024-10-24 19:12:05,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d66646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:12:05, skipping insertion in model container [2024-10-24 19:12:05,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:12:04" (2/3) ... [2024-10-24 19:12:05,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d66646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:12:05, skipping insertion in model container [2024-10-24 19:12:05,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:12:05" (3/3) ... [2024-10-24 19:12:05,108 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2024-10-24 19:12:05,124 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:12:05,125 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-10-24 19:12:05,125 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:12:05,195 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 19:12:05,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 137 transitions, 281 flow [2024-10-24 19:12:05,316 INFO L124 PetriNetUnfolderBase]: 41/207 cut-off events. [2024-10-24 19:12:05,316 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:12:05,327 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 23. Compared 1068 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. [2024-10-24 19:12:05,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 137 transitions, 281 flow [2024-10-24 19:12:05,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 137 transitions, 281 flow [2024-10-24 19:12:05,342 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:12:05,348 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;@402da793, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:12:05,348 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-24 19:12:05,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:12:05,352 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:12:05,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:12:05,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:05,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:12:05,354 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)] === [2024-10-24 19:12:05,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash 18966067, now seen corresponding path program 1 times [2024-10-24 19:12:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117400808] [2024-10-24 19:12:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:05,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117400808] [2024-10-24 19:12:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117400808] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:05,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:05,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347646644] [2024-10-24 19:12:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:05,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:05,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-10-24 19:12:05,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2024-10-24 19:12:05,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:05,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-10-24 19:12:05,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:06,142 INFO L124 PetriNetUnfolderBase]: 554/1924 cut-off events. [2024-10-24 19:12:06,143 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-10-24 19:12:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1924 events. 554/1924 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15020 event pairs, 504 based on Foata normal form. 386/2045 useless extension candidates. Maximal degree in co-relation 2927. Up to 1098 conditions per place. [2024-10-24 19:12:06,198 INFO L140 encePairwiseOnDemand]: 110/137 looper letters, 50 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-10-24 19:12:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 335 flow [2024-10-24 19:12:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-10-24 19:12:06,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6253041362530414 [2024-10-24 19:12:06,220 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 281 flow. Second operand 3 states and 257 transitions. [2024-10-24 19:12:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 335 flow [2024-10-24 19:12:06,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:12:06,230 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 241 flow [2024-10-24 19:12:06,232 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} [2024-10-24 19:12:06,238 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 1 predicate places. [2024-10-24 19:12:06,239 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 241 flow [2024-10-24 19:12:06,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2024-10-24 19:12:06,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:06,240 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:12:06,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:12:06,240 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)] === [2024-10-24 19:12:06,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 587974167, now seen corresponding path program 1 times [2024-10-24 19:12:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:06,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241608225] [2024-10-24 19:12:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:06,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:06,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241608225] [2024-10-24 19:12:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241608225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:06,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553349813] [2024-10-24 19:12:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:06,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:06,378 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) [2024-10-24 19:12:06,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:12:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:06,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:12:06,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:06,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553349813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:06,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:12:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002471485] [2024-10-24 19:12:06,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:06,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:12:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:12:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:12:06,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-10-24 19:12:06,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 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) [2024-10-24 19:12:06,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:06,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-10-24 19:12:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:06,892 INFO L124 PetriNetUnfolderBase]: 554/1927 cut-off events. [2024-10-24 19:12:06,893 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-10-24 19:12:06,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3044 conditions, 1927 events. 554/1927 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15014 event pairs, 504 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 3032. Up to 1098 conditions per place. [2024-10-24 19:12:06,906 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 50 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-10-24 19:12:06,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 363 flow [2024-10-24 19:12:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:12:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:12:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 418 transitions. [2024-10-24 19:12:06,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5085158150851582 [2024-10-24 19:12:06,910 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 241 flow. Second operand 6 states and 418 transitions. [2024-10-24 19:12:06,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 363 flow [2024-10-24 19:12:06,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 359 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:06,917 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 273 flow [2024-10-24 19:12:06,918 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} [2024-10-24 19:12:06,919 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 8 predicate places. [2024-10-24 19:12:06,919 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 273 flow [2024-10-24 19:12:06,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 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) [2024-10-24 19:12:06,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:06,920 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:12:06,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 19:12:07,121 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 [2024-10-24 19:12:07,123 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)] === [2024-10-24 19:12:07,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1487683379, now seen corresponding path program 2 times [2024-10-24 19:12:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:07,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259237712] [2024-10-24 19:12:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:07,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:12:07,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:07,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259237712] [2024-10-24 19:12:07,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259237712] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:07,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:07,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:07,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852956411] [2024-10-24 19:12:07,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:07,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:07,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2024-10-24 19:12:07,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2024-10-24 19:12:07,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:07,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2024-10-24 19:12:07,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:07,645 INFO L124 PetriNetUnfolderBase]: 598/1996 cut-off events. [2024-10-24 19:12:07,645 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:12:07,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1996 events. 598/1996 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15441 event pairs, 504 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 3181. Up to 1094 conditions per place. [2024-10-24 19:12:07,658 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 76 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-10-24 19:12:07,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 467 flow [2024-10-24 19:12:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2024-10-24 19:12:07,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5936739659367397 [2024-10-24 19:12:07,662 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 273 flow. Second operand 3 states and 244 transitions. [2024-10-24 19:12:07,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 467 flow [2024-10-24 19:12:07,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 134 transitions, 453 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:07,668 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 259 flow [2024-10-24 19:12:07,669 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} [2024-10-24 19:12:07,670 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 7 predicate places. [2024-10-24 19:12:07,671 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 259 flow [2024-10-24 19:12:07,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2024-10-24 19:12:07,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:07,671 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:12:07,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:12:07,672 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)] === [2024-10-24 19:12:07,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1487683380, now seen corresponding path program 1 times [2024-10-24 19:12:07,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:07,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096145752] [2024-10-24 19:12:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:07,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:07,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096145752] [2024-10-24 19:12:07,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096145752] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185440511] [2024-10-24 19:12:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:07,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:07,775 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) [2024-10-24 19:12:07,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:12:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:07,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:12:07,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:07,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185440511] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:07,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 19:12:07,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565082154] [2024-10-24 19:12:07,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:07,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:12:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:12:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:12:07,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-10-24 19:12:07,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 259 flow. Second operand has 13 states, 13 states have (on average 61.15384615384615) internal successors, (795), 13 states have internal predecessors, (795), 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) [2024-10-24 19:12:07,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:07,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-10-24 19:12:07,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:08,228 INFO L124 PetriNetUnfolderBase]: 554/1911 cut-off events. [2024-10-24 19:12:08,228 INFO L125 PetriNetUnfolderBase]: For 54/55 co-relation queries the response was YES. [2024-10-24 19:12:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 1911 events. 554/1911 cut-off events. For 54/55 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14748 event pairs, 504 based on Foata normal form. 6/1675 useless extension candidates. Maximal degree in co-relation 3025. Up to 1098 conditions per place. [2024-10-24 19:12:08,241 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 50 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-10-24 19:12:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 417 flow [2024-10-24 19:12:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:12:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:12:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 787 transitions. [2024-10-24 19:12:08,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4787104622871046 [2024-10-24 19:12:08,245 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 259 flow. Second operand 12 states and 787 transitions. [2024-10-24 19:12:08,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 417 flow [2024-10-24 19:12:08,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 119 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:12:08,250 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 339 flow [2024-10-24 19:12:08,250 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} [2024-10-24 19:12:08,251 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 22 predicate places. [2024-10-24 19:12:08,251 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 339 flow [2024-10-24 19:12:08,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.15384615384615) internal successors, (795), 13 states have internal predecessors, (795), 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) [2024-10-24 19:12:08,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:08,253 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-24 19:12:08,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:12:08,453 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 [2024-10-24 19:12:08,454 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)] === [2024-10-24 19:12:08,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:08,454 INFO L85 PathProgramCache]: Analyzing trace with hash 250221748, now seen corresponding path program 2 times [2024-10-24 19:12:08,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:08,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600122644] [2024-10-24 19:12:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:08,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600122644] [2024-10-24 19:12:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600122644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:08,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:08,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145323340] [2024-10-24 19:12:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:08,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:08,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:08,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2024-10-24 19:12:08,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2024-10-24 19:12:08,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:08,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2024-10-24 19:12:08,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:08,945 INFO L124 PetriNetUnfolderBase]: 549/1849 cut-off events. [2024-10-24 19:12:08,945 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-24 19:12:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 1849 events. 549/1849 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14578 event pairs, 0 based on Foata normal form. 1/1636 useless extension candidates. Maximal degree in co-relation 2953. Up to 1092 conditions per place. [2024-10-24 19:12:08,958 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 82 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-10-24 19:12:08,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 141 transitions, 551 flow [2024-10-24 19:12:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2024-10-24 19:12:08,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6155717761557178 [2024-10-24 19:12:08,960 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 339 flow. Second operand 3 states and 253 transitions. [2024-10-24 19:12:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 141 transitions, 551 flow [2024-10-24 19:12:08,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 141 transitions, 503 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-24 19:12:08,967 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 301 flow [2024-10-24 19:12:08,969 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} [2024-10-24 19:12:08,971 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 20 predicate places. [2024-10-24 19:12:08,972 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 301 flow [2024-10-24 19:12:08,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2024-10-24 19:12:08,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:08,973 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 19:12:08,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:12:08,974 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)] === [2024-10-24 19:12:08,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1360529885, now seen corresponding path program 1 times [2024-10-24 19:12:08,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:08,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347590547] [2024-10-24 19:12:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:09,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347590547] [2024-10-24 19:12:09,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347590547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219062987] [2024-10-24 19:12:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:09,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:09,184 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) [2024-10-24 19:12:09,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:12:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:09,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:12:09,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:09,320 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 [2024-10-24 19:12:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:09,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:09,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219062987] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:09,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:09,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-24 19:12:09,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765305422] [2024-10-24 19:12:09,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:09,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:12:09,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:12:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:12:09,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 137 [2024-10-24 19:12:09,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 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) [2024-10-24 19:12:09,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:09,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 137 [2024-10-24 19:12:09,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:09,811 INFO L124 PetriNetUnfolderBase]: 65/213 cut-off events. [2024-10-24 19:12:09,812 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-24 19:12:09,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 213 events. 65/213 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 855 event pairs, 0 based on Foata normal form. 44/245 useless extension candidates. Maximal degree in co-relation 412. Up to 129 conditions per place. [2024-10-24 19:12:09,814 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 59 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-10-24 19:12:09,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 352 flow [2024-10-24 19:12:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:12:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:12:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2024-10-24 19:12:09,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5200729927007299 [2024-10-24 19:12:09,816 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 301 flow. Second operand 4 states and 285 transitions. [2024-10-24 19:12:09,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 352 flow [2024-10-24 19:12:09,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 346 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:12:09,819 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 182 flow [2024-10-24 19:12:09,819 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} [2024-10-24 19:12:09,820 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, -33 predicate places. [2024-10-24 19:12:09,820 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 182 flow [2024-10-24 19:12:09,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 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) [2024-10-24 19:12:09,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:09,821 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 19:12:09,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 19:12:10,022 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 [2024-10-24 19:12:10,023 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)] === [2024-10-24 19:12:10,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 773247205, now seen corresponding path program 1 times [2024-10-24 19:12:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051744737] [2024-10-24 19:12:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:10,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:12:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:10,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:12:10,107 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:12:10,108 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-10-24 19:12:10,111 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-10-24 19:12:10,112 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-10-24 19:12:10,112 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-10-24 19:12:10,112 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-10-24 19:12:10,112 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-10-24 19:12:10,112 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-10-24 19:12:10,113 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-10-24 19:12:10,113 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-10-24 19:12:10,113 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-10-24 19:12:10,115 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-10-24 19:12:10,115 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-10-24 19:12:10,115 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-10-24 19:12:10,116 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-10-24 19:12:10,118 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-10-24 19:12:10,118 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-10-24 19:12:10,119 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-10-24 19:12:10,119 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-10-24 19:12:10,119 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-10-24 19:12:10,119 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-10-24 19:12:10,119 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-10-24 19:12:10,120 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-10-24 19:12:10,120 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-10-24 19:12:10,120 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-10-24 19:12:10,120 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-10-24 19:12:10,120 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-10-24 19:12:10,121 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-10-24 19:12:10,122 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-10-24 19:12:10,123 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-10-24 19:12:10,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:12:10,123 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-24 19:12:10,130 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:12:10,130 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 19:12:10,177 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:12:10,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 198 transitions, 412 flow [2024-10-24 19:12:10,225 INFO L124 PetriNetUnfolderBase]: 69/350 cut-off events. [2024-10-24 19:12:10,225 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-24 19:12:10,228 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 30. Compared 2047 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. [2024-10-24 19:12:10,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 198 transitions, 412 flow [2024-10-24 19:12:10,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 198 transitions, 412 flow [2024-10-24 19:12:10,235 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:12:10,236 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;@402da793, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:12:10,236 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-24 19:12:10,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:12:10,237 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:12:10,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:12:10,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:10,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:12:10,238 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)] === [2024-10-24 19:12:10,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 25061299, now seen corresponding path program 1 times [2024-10-24 19:12:10,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:10,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103792203] [2024-10-24 19:12:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:10,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103792203] [2024-10-24 19:12:10,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103792203] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:10,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:10,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897487485] [2024-10-24 19:12:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:10,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:10,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:10,266 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-10-24 19:12:10,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2024-10-24 19:12:10,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:10,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-10-24 19:12:10,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:15,398 INFO L124 PetriNetUnfolderBase]: 24909/55324 cut-off events. [2024-10-24 19:12:15,399 INFO L125 PetriNetUnfolderBase]: For 153/175 co-relation queries the response was YES. [2024-10-24 19:12:15,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92368 conditions, 55324 events. 24909/55324 cut-off events. For 153/175 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 617876 event pairs, 23247 based on Foata normal form. 13194/62140 useless extension candidates. Maximal degree in co-relation 85069. Up to 36926 conditions per place. [2024-10-24 19:12:15,926 INFO L140 encePairwiseOnDemand]: 159/198 looper letters, 73 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-10-24 19:12:15,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 160 transitions, 486 flow [2024-10-24 19:12:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2024-10-24 19:12:15,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6178451178451179 [2024-10-24 19:12:15,929 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 412 flow. Second operand 3 states and 367 transitions. [2024-10-24 19:12:15,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 160 transitions, 486 flow [2024-10-24 19:12:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:12:15,933 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 346 flow [2024-10-24 19:12:15,933 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} [2024-10-24 19:12:15,934 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2024-10-24 19:12:15,934 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 346 flow [2024-10-24 19:12:15,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2024-10-24 19:12:15,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:15,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:12:15,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:12:15,935 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)] === [2024-10-24 19:12:15,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 776926557, now seen corresponding path program 1 times [2024-10-24 19:12:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:15,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200003452] [2024-10-24 19:12:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200003452] [2024-10-24 19:12:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200003452] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862027131] [2024-10-24 19:12:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:15,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:15,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:15,974 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) [2024-10-24 19:12:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:12:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:16,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:12:16,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:16,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:16,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862027131] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:16,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:16,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:12:16,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482304960] [2024-10-24 19:12:16,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:16,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:12:16,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:16,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:12:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:12:16,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-10-24 19:12:16,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2024-10-24 19:12:16,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:16,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-10-24 19:12:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:19,917 INFO L124 PetriNetUnfolderBase]: 24909/55327 cut-off events. [2024-10-24 19:12:19,917 INFO L125 PetriNetUnfolderBase]: For 153/175 co-relation queries the response was YES. [2024-10-24 19:12:20,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92384 conditions, 55327 events. 24909/55327 cut-off events. For 153/175 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 618076 event pairs, 23247 based on Foata normal form. 0/48949 useless extension candidates. Maximal degree in co-relation 92371. Up to 36926 conditions per place. [2024-10-24 19:12:20,541 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 73 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-10-24 19:12:20,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 163 transitions, 514 flow [2024-10-24 19:12:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:12:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:12:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 591 transitions. [2024-10-24 19:12:20,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-10-24 19:12:20,545 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 346 flow. Second operand 6 states and 591 transitions. [2024-10-24 19:12:20,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 163 transitions, 514 flow [2024-10-24 19:12:20,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:20,550 INFO L231 Difference]: Finished difference. Result has 168 places, 163 transitions, 378 flow [2024-10-24 19:12:20,550 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} [2024-10-24 19:12:20,552 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 7 predicate places. [2024-10-24 19:12:20,552 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 378 flow [2024-10-24 19:12:20,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2024-10-24 19:12:20,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:20,553 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:12:20,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 19:12:20,757 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 [2024-10-24 19:12:20,758 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)] === [2024-10-24 19:12:20,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -133594573, now seen corresponding path program 2 times [2024-10-24 19:12:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286339965] [2024-10-24 19:12:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 19:12:20,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:20,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286339965] [2024-10-24 19:12:20,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286339965] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:20,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:20,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:20,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577584639] [2024-10-24 19:12:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:20,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:20,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2024-10-24 19:12:20,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2024-10-24 19:12:20,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:20,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2024-10-24 19:12:20,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:24,928 INFO L124 PetriNetUnfolderBase]: 26873/58444 cut-off events. [2024-10-24 19:12:24,928 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-10-24 19:12:25,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98482 conditions, 58444 events. 26873/58444 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 1690. Compared 647153 event pairs, 23226 based on Foata normal form. 0/52403 useless extension candidates. Maximal degree in co-relation 98447. Up to 36847 conditions per place. [2024-10-24 19:12:25,348 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 120 selfloop transitions, 2 changer transitions 0/203 dead transitions. [2024-10-24 19:12:25,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 203 transitions, 702 flow [2024-10-24 19:12:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-10-24 19:12:25,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-24 19:12:25,350 INFO L175 Difference]: Start difference. First operand has 168 places, 163 transitions, 378 flow. Second operand 3 states and 363 transitions. [2024-10-24 19:12:25,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 203 transitions, 702 flow [2024-10-24 19:12:25,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 203 transitions, 688 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:25,355 INFO L231 Difference]: Finished difference. Result has 167 places, 161 transitions, 364 flow [2024-10-24 19:12:25,355 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} [2024-10-24 19:12:25,356 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 6 predicate places. [2024-10-24 19:12:25,356 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 364 flow [2024-10-24 19:12:25,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2024-10-24 19:12:25,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:25,357 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-24 19:12:25,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 19:12:25,357 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)] === [2024-10-24 19:12:25,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -133594572, now seen corresponding path program 1 times [2024-10-24 19:12:25,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:25,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385901386] [2024-10-24 19:12:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:25,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385901386] [2024-10-24 19:12:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385901386] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:25,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624785536] [2024-10-24 19:12:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:25,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:25,431 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) [2024-10-24 19:12:25,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 19:12:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:25,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:12:25,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:25,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:25,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624785536] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:25,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:25,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-24 19:12:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14781755] [2024-10-24 19:12:25,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:25,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:12:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:12:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:12:25,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-10-24 19:12:25,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 364 flow. Second operand has 13 states, 13 states have (on average 86.15384615384616) internal successors, (1120), 13 states have internal predecessors, (1120), 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) [2024-10-24 19:12:25,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:25,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-10-24 19:12:25,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:30,097 INFO L124 PetriNetUnfolderBase]: 24909/55039 cut-off events. [2024-10-24 19:12:30,098 INFO L125 PetriNetUnfolderBase]: For 440/462 co-relation queries the response was YES. [2024-10-24 19:12:30,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92651 conditions, 55039 events. 24909/55039 cut-off events. For 440/462 co-relation queries the response was YES. Maximal size of possible extension queue 1630. Compared 611509 event pairs, 23247 based on Foata normal form. 6/48962 useless extension candidates. Maximal degree in co-relation 92598. Up to 36926 conditions per place. [2024-10-24 19:12:30,539 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 73 selfloop transitions, 11 changer transitions 0/167 dead transitions. [2024-10-24 19:12:30,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 568 flow [2024-10-24 19:12:30,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:12:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:12:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1110 transitions. [2024-10-24 19:12:30,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-10-24 19:12:30,544 INFO L175 Difference]: Start difference. First operand has 167 places, 161 transitions, 364 flow. Second operand 12 states and 1110 transitions. [2024-10-24 19:12:30,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 568 flow [2024-10-24 19:12:30,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 167 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:12:30,604 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 444 flow [2024-10-24 19:12:30,605 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} [2024-10-24 19:12:30,605 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-24 19:12:30,605 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 444 flow [2024-10-24 19:12:30,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.15384615384616) internal successors, (1120), 13 states have internal predecessors, (1120), 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) [2024-10-24 19:12:30,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:30,606 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-24 19:12:30,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 19:12:30,807 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 [2024-10-24 19:12:30,807 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)] === [2024-10-24 19:12:30,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1825844748, now seen corresponding path program 2 times [2024-10-24 19:12:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167647510] [2024-10-24 19:12:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167647510] [2024-10-24 19:12:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167647510] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275912773] [2024-10-24 19:12:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:30,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:30,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2024-10-24 19:12:30,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2024-10-24 19:12:30,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:30,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2024-10-24 19:12:30,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:35,867 INFO L124 PetriNetUnfolderBase]: 25299/56215 cut-off events. [2024-10-24 19:12:35,867 INFO L125 PetriNetUnfolderBase]: For 280/302 co-relation queries the response was YES. [2024-10-24 19:12:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94225 conditions, 56215 events. 25299/56215 cut-off events. For 280/302 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 635179 event pairs, 11634 based on Foata normal form. 1/50162 useless extension candidates. Maximal degree in co-relation 94148. Up to 37810 conditions per place. [2024-10-24 19:12:36,265 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 106 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2024-10-24 19:12:36,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 190 transitions, 706 flow [2024-10-24 19:12:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:12:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:12:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2024-10-24 19:12:36,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-10-24 19:12:36,267 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 444 flow. Second operand 3 states and 352 transitions. [2024-10-24 19:12:36,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 190 transitions, 706 flow [2024-10-24 19:12:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 190 transitions, 658 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-24 19:12:36,273 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 410 flow [2024-10-24 19:12:36,274 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} [2024-10-24 19:12:36,275 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-10-24 19:12:36,275 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 410 flow [2024-10-24 19:12:36,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2024-10-24 19:12:36,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:36,275 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 19:12:36,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 19:12:36,276 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)] === [2024-10-24 19:12:36,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1778325816, now seen corresponding path program 1 times [2024-10-24 19:12:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388906759] [2024-10-24 19:12:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:36,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388906759] [2024-10-24 19:12:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388906759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:12:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113955337] [2024-10-24 19:12:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:12:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:12:36,408 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) [2024-10-24 19:12:36,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 19:12:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:36,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:12:36,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:12:36,530 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 [2024-10-24 19:12:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:36,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:12:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:36,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113955337] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:12:36,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:12:36,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 19:12:36,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668573882] [2024-10-24 19:12:36,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:12:36,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:12:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:36,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:12:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:12:36,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2024-10-24 19:12:36,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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) [2024-10-24 19:12:36,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:36,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2024-10-24 19:12:36,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:41,328 INFO L124 PetriNetUnfolderBase]: 24660/52921 cut-off events. [2024-10-24 19:12:41,328 INFO L125 PetriNetUnfolderBase]: For 1264/1264 co-relation queries the response was YES. [2024-10-24 19:12:41,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91095 conditions, 52921 events. 24660/52921 cut-off events. For 1264/1264 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 583044 event pairs, 337 based on Foata normal form. 528/48521 useless extension candidates. Maximal degree in co-relation 91041. Up to 31632 conditions per place. [2024-10-24 19:12:41,712 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 191 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2024-10-24 19:12:41,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 276 transitions, 1014 flow [2024-10-24 19:12:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:12:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:12:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2024-10-24 19:12:41,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-10-24 19:12:41,715 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 410 flow. Second operand 5 states and 603 transitions. [2024-10-24 19:12:41,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 276 transitions, 1014 flow [2024-10-24 19:12:41,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 276 transitions, 1012 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:12:41,728 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 412 flow [2024-10-24 19:12:41,729 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} [2024-10-24 19:12:41,729 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-10-24 19:12:41,729 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 412 flow [2024-10-24 19:12:41,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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) [2024-10-24 19:12:41,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:41,730 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:12:41,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 19:12:41,930 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 [2024-10-24 19:12:41,931 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)] === [2024-10-24 19:12:41,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1349448958, now seen corresponding path program 1 times [2024-10-24 19:12:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:41,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183260800] [2024-10-24 19:12:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-24 19:12:42,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:42,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183260800] [2024-10-24 19:12:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183260800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:12:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464634169] [2024-10-24 19:12:42,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:42,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:12:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:12:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:12:42,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2024-10-24 19:12:42,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2024-10-24 19:12:42,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:42,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2024-10-24 19:12:42,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:12:47,340 INFO L124 PetriNetUnfolderBase]: 28497/59891 cut-off events. [2024-10-24 19:12:47,340 INFO L125 PetriNetUnfolderBase]: For 3119/3119 co-relation queries the response was YES. [2024-10-24 19:12:47,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104649 conditions, 59891 events. 28497/59891 cut-off events. For 3119/3119 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 640632 event pairs, 23133 based on Foata normal form. 0/56234 useless extension candidates. Maximal degree in co-relation 104595. Up to 35942 conditions per place. [2024-10-24 19:12:47,756 INFO L140 encePairwiseOnDemand]: 171/198 looper letters, 170 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2024-10-24 19:12:47,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 247 transitions, 936 flow [2024-10-24 19:12:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:12:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:12:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2024-10-24 19:12:47,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-24 19:12:47,758 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 412 flow. Second operand 4 states and 468 transitions. [2024-10-24 19:12:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 247 transitions, 936 flow [2024-10-24 19:12:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 926 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-24 19:12:47,765 INFO L231 Difference]: Finished difference. Result has 180 places, 172 transitions, 520 flow [2024-10-24 19:12:47,765 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=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=180, PETRI_TRANSITIONS=172} [2024-10-24 19:12:47,766 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-10-24 19:12:47,766 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 172 transitions, 520 flow [2024-10-24 19:12:47,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2024-10-24 19:12:47,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:47,766 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-10-24 19:12:47,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 19:12:47,767 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)] === [2024-10-24 19:12:47,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:47,767 INFO L85 PathProgramCache]: Analyzing trace with hash 790945038, now seen corresponding path program 1 times [2024-10-24 19:12:47,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127784480] [2024-10-24 19:12:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:47,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 19:12:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 19:12:47,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 19:12:47,807 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 19:12:47,807 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-24 19:12:47,807 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-24 19:12:47,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-24 19:12:47,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-24 19:12:47,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-24 19:12:47,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-24 19:12:47,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-24 19:12:47,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-24 19:12:47,816 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-24 19:12:47,817 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-24 19:12:47,818 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-24 19:12:47,818 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-24 19:12:47,818 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-24 19:12:47,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-24 19:12:47,818 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-10-24 19:12:47,819 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 19:12:47,819 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 19:12:47,868 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:12:47,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 259 transitions, 545 flow [2024-10-24 19:12:47,914 INFO L124 PetriNetUnfolderBase]: 100/514 cut-off events. [2024-10-24 19:12:47,915 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 19:12:47,919 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 30. Compared 3115 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. [2024-10-24 19:12:47,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 259 transitions, 545 flow [2024-10-24 19:12:47,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 259 transitions, 545 flow [2024-10-24 19:12:47,927 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:12:47,927 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;@402da793, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:12:47,927 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-24 19:12:47,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:12:47,929 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-24 19:12:47,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:12:47,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:12:47,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:12:47,929 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)] === [2024-10-24 19:12:47,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:12:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash 33034355, now seen corresponding path program 1 times [2024-10-24 19:12:47,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:12:47,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032607208] [2024-10-24 19:12:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:12:47,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:12:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:12:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:12:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:12:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032607208] [2024-10-24 19:12:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032607208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:12:47,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:12:47,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:12:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844266204] [2024-10-24 19:12:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:12:47,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:12:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:12:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:12:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:12:47,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 259 [2024-10-24 19:12:47,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 259 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-10-24 19:12:47,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:12:47,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 259 [2024-10-24 19:12:47,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand