./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:28:26,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:28:26,256 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:28:26,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:28:26,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:28:26,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:28:26,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:28:26,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:28:26,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:28:26,298 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:28:26,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:28:26,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:28:26,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:28:26,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:28:26,300 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:28:26,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:28:26,303 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:28:26,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:28:26,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:28:26,304 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:28:26,304 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:28:26,304 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:28:26,305 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:28:26,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:28:26,305 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:28:26,306 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:28:26,306 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:28:26,306 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:28:26,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:28:26,307 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:28:26,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:28:26,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:28:26,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:28:26,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:26,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:28:26,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:28:26,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:28:26,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:28:26,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:28:26,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:28:26,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:28:26,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:28:26,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eff698bae51c39e8a3a4c763800dbda831dabb73a169fa31c8e326faee47cd8 [2024-11-17 03:28:26,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:28:26,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:28:26,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:28:26,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:28:26,594 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:28:26,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-11-17 03:28:28,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:28:28,359 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:28:28,360 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_36-indirect_racefree.i [2024-11-17 03:28:28,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205f93569/642d3d94434d46c29da599b7c32e2013/FLAG74409ce35 [2024-11-17 03:28:28,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/205f93569/642d3d94434d46c29da599b7c32e2013 [2024-11-17 03:28:28,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:28:28,682 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:28:28,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:28,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:28:28,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:28:28,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:28" (1/1) ... [2024-11-17 03:28:28,690 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261a41aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:28, skipping insertion in model container [2024-11-17 03:28:28,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:28" (1/1) ... [2024-11-17 03:28:28,732 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:28:29,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:29,099 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:28:29,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:29,178 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:28:29,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29 WrapperNode [2024-11-17 03:28:29,179 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:29,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:29,180 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:28:29,180 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:28:29,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,226 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2024-11-17 03:28:29,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:29,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:28:29,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:28:29,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:28:29,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,255 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 6, 5, 2]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5, 0]. The 3 writes are split as follows [0, 0, 2, 0, 1]. [2024-11-17 03:28:29,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,262 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:28:29,270 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:28:29,270 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:28:29,270 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:28:29,271 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:29,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:29,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:28:29,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:28:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:28:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:28:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:28:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-17 03:28:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:28:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:28:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:28:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:28:29,441 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:28:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:28:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:28:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:28:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:28:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:28:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-17 03:28:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:28:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:28:29,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:28:29,445 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:28:29,604 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:28:29,607 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:28:29,811 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L709: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-17 03:28:29,812 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L709-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-17 03:28:29,862 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:28:29,862 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:28:30,001 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:28:30,002 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:28:30,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:30 BoogieIcfgContainer [2024-11-17 03:28:30,003 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:28:30,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:28:30,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:28:30,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:28:30,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:28:28" (1/3) ... [2024-11-17 03:28:30,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31faa7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:30, skipping insertion in model container [2024-11-17 03:28:30,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29" (2/3) ... [2024-11-17 03:28:30,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31faa7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:30, skipping insertion in model container [2024-11-17 03:28:30,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:30" (3/3) ... [2024-11-17 03:28:30,015 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2024-11-17 03:28:30,031 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:28:30,031 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-17 03:28:30,031 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:28:30,087 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-17 03:28:30,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 84 transitions, 175 flow [2024-11-17 03:28:30,187 INFO L124 PetriNetUnfolderBase]: 19/125 cut-off events. [2024-11-17 03:28:30,187 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:28:30,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 19/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 513 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2024-11-17 03:28:30,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 84 transitions, 175 flow [2024-11-17 03:28:30,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 84 transitions, 175 flow [2024-11-17 03:28:30,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:30,221 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;@2c9a4194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:30,222 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-17 03:28:30,227 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:30,227 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:30,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:30,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:30,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:30,233 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:30,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 10640098, now seen corresponding path program 1 times [2024-11-17 03:28:30,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313940016] [2024-11-17 03:28:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313940016] [2024-11-17 03:28:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313940016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:30,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:30,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625991050] [2024-11-17 03:28:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:30,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:30,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-17 03:28:30,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 84 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:30,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:30,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-17 03:28:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:30,862 INFO L124 PetriNetUnfolderBase]: 155/609 cut-off events. [2024-11-17 03:28:30,863 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:28:30,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 609 events. 155/609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3589 event pairs, 132 based on Foata normal form. 165/724 useless extension candidates. Maximal degree in co-relation 902. Up to 302 conditions per place. [2024-11-17 03:28:30,872 INFO L140 encePairwiseOnDemand]: 68/84 looper letters, 38 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-17 03:28:30,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 80 transitions, 247 flow [2024-11-17 03:28:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-17 03:28:30,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-11-17 03:28:30,889 INFO L175 Difference]: Start difference. First operand has 74 places, 84 transitions, 175 flow. Second operand 3 states and 180 transitions. [2024-11-17 03:28:30,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 80 transitions, 247 flow [2024-11-17 03:28:30,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:30,897 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 149 flow [2024-11-17 03:28:30,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-17 03:28:30,902 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-17 03:28:30,903 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 149 flow [2024-11-17 03:28:30,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:30,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:30,904 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:30,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:28:30,904 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:30,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash 10640099, now seen corresponding path program 1 times [2024-11-17 03:28:30,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:30,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458783738] [2024-11-17 03:28:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:31,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:31,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458783738] [2024-11-17 03:28:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458783738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:31,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:31,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346892359] [2024-11-17 03:28:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:31,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:31,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2024-11-17 03:28:31,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2024-11-17 03:28:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:31,313 INFO L124 PetriNetUnfolderBase]: 165/638 cut-off events. [2024-11-17 03:28:31,314 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-17 03:28:31,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 638 events. 165/638 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3715 event pairs, 154 based on Foata normal form. 1/563 useless extension candidates. Maximal degree in co-relation 990. Up to 350 conditions per place. [2024-11-17 03:28:31,322 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 40 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-17 03:28:31,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 257 flow [2024-11-17 03:28:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-17 03:28:31,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-11-17 03:28:31,326 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 149 flow. Second operand 3 states and 167 transitions. [2024-11-17 03:28:31,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 257 flow [2024-11-17 03:28:31,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:28:31,332 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 155 flow [2024-11-17 03:28:31,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-11-17 03:28:31,333 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-17 03:28:31,333 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 155 flow [2024-11-17 03:28:31,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:31,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:31,336 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:31,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:28:31,336 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:31,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1033185314, now seen corresponding path program 1 times [2024-11-17 03:28:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:31,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56233232] [2024-11-17 03:28:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:31,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:31,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56233232] [2024-11-17 03:28:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56233232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505246085] [2024-11-17 03:28:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:31,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:31,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:28:31,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:28:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:31,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:28:31,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:31,757 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 [2024-11-17 03:28:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:31,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:31,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505246085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:31,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:31,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:28:31,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611795095] [2024-11-17 03:28:31,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:31,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:28:31,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:28:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:28:32,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 84 [2024-11-17 03:28:32,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 42.333333333333336) internal successors, (381), 9 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:32,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:32,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 84 [2024-11-17 03:28:32,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:32,175 INFO L124 PetriNetUnfolderBase]: 33/129 cut-off events. [2024-11-17 03:28:32,176 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:28:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 129 events. 33/129 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 393 event pairs, 0 based on Foata normal form. 24/146 useless extension candidates. Maximal degree in co-relation 216. Up to 69 conditions per place. [2024-11-17 03:28:32,177 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-17 03:28:32,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:28:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:28:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-17 03:28:32,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-11-17 03:28:32,180 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 155 flow. Second operand 4 states and 191 transitions. [2024-11-17 03:28:32,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:32,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:28:32,181 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:32,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-17 03:28:32,182 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -30 predicate places. [2024-11-17 03:28:32,183 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:32,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 42.333333333333336) internal successors, (381), 9 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:32,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:32,183 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-17 03:28:32,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:28:32,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:32,385 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:32,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1963973968, now seen corresponding path program 1 times [2024-11-17 03:28:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407258122] [2024-11-17 03:28:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:32,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:32,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:32,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:32,458 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:32,460 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-11-17 03:28:32,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-11-17 03:28:32,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-11-17 03:28:32,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-11-17 03:28:32,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-11-17 03:28:32,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-11-17 03:28:32,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-11-17 03:28:32,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-11-17 03:28:32,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-11-17 03:28:32,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-11-17 03:28:32,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-11-17 03:28:32,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-11-17 03:28:32,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-11-17 03:28:32,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-11-17 03:28:32,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-11-17 03:28:32,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-11-17 03:28:32,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-11-17 03:28:32,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-11-17 03:28:32,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-11-17 03:28:32,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-11-17 03:28:32,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:28:32,467 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-17 03:28:32,470 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:32,470 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:28:32,498 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:28:32,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 262 flow [2024-11-17 03:28:32,523 INFO L124 PetriNetUnfolderBase]: 34/220 cut-off events. [2024-11-17 03:28:32,523 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:28:32,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 220 events. 34/220 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1027 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2024-11-17 03:28:32,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 123 transitions, 262 flow [2024-11-17 03:28:32,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 123 transitions, 262 flow [2024-11-17 03:28:32,530 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:32,530 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;@2c9a4194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:32,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-17 03:28:32,534 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:32,534 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:32,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:32,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:32,534 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:32,534 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:32,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash 14426530, now seen corresponding path program 1 times [2024-11-17 03:28:32,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:32,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742731683] [2024-11-17 03:28:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:32,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742731683] [2024-11-17 03:28:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742731683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:32,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582765935] [2024-11-17 03:28:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:32,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:32,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 123 [2024-11-17 03:28:32,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 262 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) [2024-11-17 03:28:32,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:32,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 123 [2024-11-17 03:28:32,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:33,757 INFO L124 PetriNetUnfolderBase]: 4062/9277 cut-off events. [2024-11-17 03:28:33,758 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-17 03:28:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15834 conditions, 9277 events. 4062/9277 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 82033 event pairs, 3476 based on Foata normal form. 3159/11822 useless extension candidates. Maximal degree in co-relation 10927. Up to 5579 conditions per place. [2024-11-17 03:28:33,827 INFO L140 encePairwiseOnDemand]: 101/123 looper letters, 62 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-11-17 03:28:33,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 124 transitions, 392 flow [2024-11-17 03:28:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2024-11-17 03:28:33,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7479674796747967 [2024-11-17 03:28:33,832 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 262 flow. Second operand 3 states and 276 transitions. [2024-11-17 03:28:33,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 124 transitions, 392 flow [2024-11-17 03:28:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:33,838 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 224 flow [2024-11-17 03:28:33,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-11-17 03:28:33,839 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -1 predicate places. [2024-11-17 03:28:33,840 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 224 flow [2024-11-17 03:28:33,840 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) [2024-11-17 03:28:33,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:33,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:33,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:28:33,841 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:33,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash 14426531, now seen corresponding path program 1 times [2024-11-17 03:28:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:33,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648579412] [2024-11-17 03:28:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648579412] [2024-11-17 03:28:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648579412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:33,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:33,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239993584] [2024-11-17 03:28:33,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:33,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:33,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 123 [2024-11-17 03:28:33,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:33,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:33,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 123 [2024-11-17 03:28:33,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:35,171 INFO L124 PetriNetUnfolderBase]: 4325/10338 cut-off events. [2024-11-17 03:28:35,171 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-11-17 03:28:35,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17464 conditions, 10338 events. 4325/10338 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 96057 event pairs, 2024 based on Foata normal form. 1/9400 useless extension candidates. Maximal degree in co-relation 15274. Up to 6874 conditions per place. [2024-11-17 03:28:35,249 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 54 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2024-11-17 03:28:35,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 115 transitions, 362 flow [2024-11-17 03:28:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2024-11-17 03:28:35,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531165311653117 [2024-11-17 03:28:35,251 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 224 flow. Second operand 3 states and 241 transitions. [2024-11-17 03:28:35,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 115 transitions, 362 flow [2024-11-17 03:28:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 115 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:28:35,265 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 234 flow [2024-11-17 03:28:35,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-11-17 03:28:35,268 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, 0 predicate places. [2024-11-17 03:28:35,268 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 234 flow [2024-11-17 03:28:35,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:35,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:35,268 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:35,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:28:35,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:35,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1456336702, now seen corresponding path program 1 times [2024-11-17 03:28:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:35,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950470614] [2024-11-17 03:28:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:35,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950470614] [2024-11-17 03:28:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950470614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898765887] [2024-11-17 03:28:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:35,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:28:35,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:28:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:35,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:28:35,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:35,484 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 [2024-11-17 03:28:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:35,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:35,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898765887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:35,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:35,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:28:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459914058] [2024-11-17 03:28:35,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:35,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:28:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:28:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:28:35,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 123 [2024-11-17 03:28:35,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 234 flow. Second operand has 9 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:35,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:35,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 123 [2024-11-17 03:28:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:36,104 INFO L124 PetriNetUnfolderBase]: 957/2145 cut-off events. [2024-11-17 03:28:36,105 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-11-17 03:28:36,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3942 conditions, 2145 events. 957/2145 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14821 event pairs, 0 based on Foata normal form. 312/2366 useless extension candidates. Maximal degree in co-relation 331. Up to 1224 conditions per place. [2024-11-17 03:28:36,119 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 63 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2024-11-17 03:28:36,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 366 flow [2024-11-17 03:28:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:28:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:28:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2024-11-17 03:28:36,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-17 03:28:36,121 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 234 flow. Second operand 5 states and 370 transitions. [2024-11-17 03:28:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 366 flow [2024-11-17 03:28:36,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:36,125 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 164 flow [2024-11-17 03:28:36,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-11-17 03:28:36,128 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2024-11-17 03:28:36,128 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 164 flow [2024-11-17 03:28:36,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:36,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:36,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:36,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:28:36,329 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,SelfDestructingSolverStorable6 [2024-11-17 03:28:36,330 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:36,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash 343728121, now seen corresponding path program 1 times [2024-11-17 03:28:36,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:36,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864008537] [2024-11-17 03:28:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864008537] [2024-11-17 03:28:36,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864008537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:36,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:36,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:28:36,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777128244] [2024-11-17 03:28:36,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:36,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:28:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:36,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:28:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:28:36,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 123 [2024-11-17 03:28:36,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:36,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:36,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 123 [2024-11-17 03:28:36,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:36,754 INFO L124 PetriNetUnfolderBase]: 957/2208 cut-off events. [2024-11-17 03:28:36,754 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-11-17 03:28:36,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2208 events. 957/2208 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14888 event pairs, 957 based on Foata normal form. 0/2151 useless extension candidates. Maximal degree in co-relation 2844. Up to 1584 conditions per place. [2024-11-17 03:28:36,767 INFO L140 encePairwiseOnDemand]: 114/123 looper letters, 28 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2024-11-17 03:28:36,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 206 flow [2024-11-17 03:28:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-11-17 03:28:36,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-17 03:28:36,769 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 164 flow. Second operand 3 states and 198 transitions. [2024-11-17 03:28:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 206 flow [2024-11-17 03:28:36,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 63 transitions, 199 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:28:36,772 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 143 flow [2024-11-17 03:28:36,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-17 03:28:36,774 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -36 predicate places. [2024-11-17 03:28:36,774 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 143 flow [2024-11-17 03:28:36,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:36,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:36,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:36,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:28:36,775 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:36,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 343728122, now seen corresponding path program 1 times [2024-11-17 03:28:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:36,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237403058] [2024-11-17 03:28:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237403058] [2024-11-17 03:28:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237403058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:28:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886726976] [2024-11-17 03:28:36,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:36,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:28:36,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:36,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:28:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:28:36,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 123 [2024-11-17 03:28:36,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:36,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:36,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 123 [2024-11-17 03:28:36,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:37,081 INFO L124 PetriNetUnfolderBase]: 682/1571 cut-off events. [2024-11-17 03:28:37,081 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-11-17 03:28:37,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1571 events. 682/1571 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9779 event pairs, 682 based on Foata normal form. 0/1519 useless extension candidates. Maximal degree in co-relation 2915. Up to 1152 conditions per place. [2024-11-17 03:28:37,088 INFO L140 encePairwiseOnDemand]: 114/123 looper letters, 27 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2024-11-17 03:28:37,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 183 flow [2024-11-17 03:28:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2024-11-17 03:28:37,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-11-17 03:28:37,090 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 143 flow. Second operand 3 states and 203 transitions. [2024-11-17 03:28:37,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 183 flow [2024-11-17 03:28:37,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:37,092 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 128 flow [2024-11-17 03:28:37,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-17 03:28:37,093 INFO L277 CegarLoopForPetriNet]: 108 programPoint places, -43 predicate places. [2024-11-17 03:28:37,093 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 128 flow [2024-11-17 03:28:37,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:37,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:37,094 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-17 03:28:37,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:28:37,094 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:37,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash 747421134, now seen corresponding path program 1 times [2024-11-17 03:28:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:37,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141915741] [2024-11-17 03:28:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:37,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:37,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:37,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:37,123 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:37,123 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-11-17 03:28:37,123 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-11-17 03:28:37,123 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-11-17 03:28:37,124 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-11-17 03:28:37,125 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-11-17 03:28:37,126 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-11-17 03:28:37,127 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-11-17 03:28:37,128 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-11-17 03:28:37,128 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-11-17 03:28:37,128 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-11-17 03:28:37,128 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-11-17 03:28:37,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:28:37,128 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-17 03:28:37,129 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:37,129 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-17 03:28:37,154 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:28:37,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 162 transitions, 351 flow [2024-11-17 03:28:37,184 INFO L124 PetriNetUnfolderBase]: 54/342 cut-off events. [2024-11-17 03:28:37,185 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:28:37,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 342 events. 54/342 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1681 event pairs, 1 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 231. Up to 16 conditions per place. [2024-11-17 03:28:37,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 162 transitions, 351 flow [2024-11-17 03:28:37,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 162 transitions, 351 flow [2024-11-17 03:28:37,193 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:37,195 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;@2c9a4194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:37,195 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-11-17 03:28:37,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:37,197 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:37,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:37,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:37,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:37,197 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:28:37,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 19413538, now seen corresponding path program 1 times [2024-11-17 03:28:37,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:37,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870341846] [2024-11-17 03:28:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:37,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870341846] [2024-11-17 03:28:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870341846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:37,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651346881] [2024-11-17 03:28:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:37,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:37,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 162 [2024-11-17 03:28:37,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 162 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:37,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:37,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 162 [2024-11-17 03:28:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:49,847 INFO L124 PetriNetUnfolderBase]: 76898/138497 cut-off events. [2024-11-17 03:28:49,848 INFO L125 PetriNetUnfolderBase]: For 1729/1729 co-relation queries the response was YES. [2024-11-17 03:28:50,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246512 conditions, 138497 events. 76898/138497 cut-off events. For 1729/1729 co-relation queries the response was YES. Maximal size of possible extension queue 3073. Compared 1452612 event pairs, 65561 based on Foata normal form. 52666/183627 useless extension candidates. Maximal degree in co-relation 113055. Up to 91341 conditions per place. [2024-11-17 03:28:51,215 INFO L140 encePairwiseOnDemand]: 134/162 looper letters, 86 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2024-11-17 03:28:51,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 168 transitions, 539 flow [2024-11-17 03:28:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2024-11-17 03:28:51,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2024-11-17 03:28:51,219 INFO L175 Difference]: Start difference. First operand has 142 places, 162 transitions, 351 flow. Second operand 3 states and 372 transitions. [2024-11-17 03:28:51,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 168 transitions, 539 flow [2024-11-17 03:28:51,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 168 transitions, 539 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:51,227 INFO L231 Difference]: Finished difference. Result has 141 places, 135 transitions, 301 flow [2024-11-17 03:28:51,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2024-11-17 03:28:51,228 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2024-11-17 03:28:51,228 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 301 flow [2024-11-17 03:28:51,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:51,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:51,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:51,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:28:51,229 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:28:51,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:51,229 INFO L85 PathProgramCache]: Analyzing trace with hash 19413539, now seen corresponding path program 1 times [2024-11-17 03:28:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125358915] [2024-11-17 03:28:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:28:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:51,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125358915] [2024-11-17 03:28:51,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125358915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:51,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389725898] [2024-11-17 03:28:51,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:51,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:51,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 162 [2024-11-17 03:28:51,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:51,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:51,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 162 [2024-11-17 03:28:51,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:03,669 INFO L124 PetriNetUnfolderBase]: 81374/148111 cut-off events. [2024-11-17 03:29:03,669 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-11-17 03:29:04,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264364 conditions, 148111 events. 81374/148111 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 3232. Compared 1575226 event pairs, 78610 based on Foata normal form. 1/137197 useless extension candidates. Maximal degree in co-relation 228184. Up to 112915 conditions per place. [2024-11-17 03:29:04,748 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 67 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2024-11-17 03:29:04,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 148 transitions, 465 flow [2024-11-17 03:29:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2024-11-17 03:29:04,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6460905349794238 [2024-11-17 03:29:04,749 INFO L175 Difference]: Start difference. First operand has 141 places, 135 transitions, 301 flow. Second operand 3 states and 314 transitions. [2024-11-17 03:29:04,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 148 transitions, 465 flow [2024-11-17 03:29:04,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 148 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:29:04,962 INFO L231 Difference]: Finished difference. Result has 142 places, 136 transitions, 311 flow [2024-11-17 03:29:04,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=142, PETRI_TRANSITIONS=136} [2024-11-17 03:29:04,963 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, 0 predicate places. [2024-11-17 03:29:04,963 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 136 transitions, 311 flow [2024-11-17 03:29:04,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:04,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:04,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:29:04,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:29:04,964 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:04,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -765352439, now seen corresponding path program 1 times [2024-11-17 03:29:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:04,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54706720] [2024-11-17 03:29:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:04,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:05,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54706720] [2024-11-17 03:29:05,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54706720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:05,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020157315] [2024-11-17 03:29:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:05,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:05,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:05,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:29:05,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:29:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:05,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:29:05,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:05,418 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 [2024-11-17 03:29:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:05,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020157315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:05,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:29:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047137521] [2024-11-17 03:29:05,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:05,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:29:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:29:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:29:05,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 162 [2024-11-17 03:29:05,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 136 transitions, 311 flow. Second operand has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:05,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:05,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 162 [2024-11-17 03:29:05,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:08,763 INFO L124 PetriNetUnfolderBase]: 18381/36993 cut-off events. [2024-11-17 03:29:08,763 INFO L125 PetriNetUnfolderBase]: For 7367/7367 co-relation queries the response was YES. [2024-11-17 03:29:08,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65431 conditions, 36993 events. 18381/36993 cut-off events. For 7367/7367 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 367172 event pairs, 3168 based on Foata normal form. 3768/38366 useless extension candidates. Maximal degree in co-relation 5551. Up to 19440 conditions per place. [2024-11-17 03:29:08,964 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 110 selfloop transitions, 4 changer transitions 0/176 dead transitions. [2024-11-17 03:29:08,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 608 flow [2024-11-17 03:29:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:29:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:29:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 600 transitions. [2024-11-17 03:29:08,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-11-17 03:29:08,967 INFO L175 Difference]: Start difference. First operand has 142 places, 136 transitions, 311 flow. Second operand 6 states and 600 transitions. [2024-11-17 03:29:08,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 608 flow [2024-11-17 03:29:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 604 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:08,971 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 240 flow [2024-11-17 03:29:08,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-17 03:29:08,971 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -26 predicate places. [2024-11-17 03:29:08,971 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 240 flow [2024-11-17 03:29:08,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:08,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:08,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:08,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:29:09,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:09,173 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:09,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 439277376, now seen corresponding path program 1 times [2024-11-17 03:29:09,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:09,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716779491] [2024-11-17 03:29:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:09,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716779491] [2024-11-17 03:29:09,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716779491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:09,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:09,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459281531] [2024-11-17 03:29:09,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:09,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:29:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:29:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:29:09,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 162 [2024-11-17 03:29:09,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:09,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:09,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 162 [2024-11-17 03:29:09,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:11,666 INFO L124 PetriNetUnfolderBase]: 18381/32924 cut-off events. [2024-11-17 03:29:11,666 INFO L125 PetriNetUnfolderBase]: For 6414/6414 co-relation queries the response was YES. [2024-11-17 03:29:11,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63091 conditions, 32924 events. 18381/32924 cut-off events. For 6414/6414 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 289055 event pairs, 18381 based on Foata normal form. 0/32041 useless extension candidates. Maximal degree in co-relation 46564. Up to 25920 conditions per place. [2024-11-17 03:29:11,844 INFO L140 encePairwiseOnDemand]: 149/162 looper letters, 41 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2024-11-17 03:29:11,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 92 transitions, 300 flow [2024-11-17 03:29:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2024-11-17 03:29:11,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5390946502057613 [2024-11-17 03:29:11,846 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 240 flow. Second operand 3 states and 262 transitions. [2024-11-17 03:29:11,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 92 transitions, 300 flow [2024-11-17 03:29:11,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 291 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:29:11,850 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 209 flow [2024-11-17 03:29:11,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2024-11-17 03:29:11,850 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -39 predicate places. [2024-11-17 03:29:11,850 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 209 flow [2024-11-17 03:29:11,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:11,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:11,851 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:11,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:29:11,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:11,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash 439277377, now seen corresponding path program 1 times [2024-11-17 03:29:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:11,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426854589] [2024-11-17 03:29:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426854589] [2024-11-17 03:29:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426854589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:11,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492530562] [2024-11-17 03:29:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:11,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:29:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:29:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:29:12,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 162 [2024-11-17 03:29:12,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:12,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:12,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 162 [2024-11-17 03:29:12,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:13,913 INFO L124 PetriNetUnfolderBase]: 13354/23647 cut-off events. [2024-11-17 03:29:13,914 INFO L125 PetriNetUnfolderBase]: For 2716/2716 co-relation queries the response was YES. [2024-11-17 03:29:13,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45017 conditions, 23647 events. 13354/23647 cut-off events. For 2716/2716 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 196467 event pairs, 13354 based on Foata normal form. 0/22928 useless extension candidates. Maximal degree in co-relation 45007. Up to 19008 conditions per place. [2024-11-17 03:29:14,033 INFO L140 encePairwiseOnDemand]: 149/162 looper letters, 40 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-11-17 03:29:14,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 267 flow [2024-11-17 03:29:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2024-11-17 03:29:14,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5493827160493827 [2024-11-17 03:29:14,034 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 209 flow. Second operand 3 states and 267 transitions. [2024-11-17 03:29:14,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 267 flow [2024-11-17 03:29:14,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:14,037 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 186 flow [2024-11-17 03:29:14,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2024-11-17 03:29:14,038 INFO L277 CegarLoopForPetriNet]: 142 programPoint places, -50 predicate places. [2024-11-17 03:29:14,038 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 186 flow [2024-11-17 03:29:14,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:14,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:14,038 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-11-17 03:29:14,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:29:14,039 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:14,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:14,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1592250001, now seen corresponding path program 1 times [2024-11-17 03:29:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:14,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222302243] [2024-11-17 03:29:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:14,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:14,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:29:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:14,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:29:14,077 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:29:14,078 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2024-11-17 03:29:14,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2024-11-17 03:29:14,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2024-11-17 03:29:14,080 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2024-11-17 03:29:14,081 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2024-11-17 03:29:14,082 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2024-11-17 03:29:14,084 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2024-11-17 03:29:14,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2024-11-17 03:29:14,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2024-11-17 03:29:14,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:29:14,085 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-17 03:29:14,085 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:29:14,085 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-17 03:29:14,118 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:29:14,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 201 transitions, 442 flow [2024-11-17 03:29:14,163 INFO L124 PetriNetUnfolderBase]: 86/520 cut-off events. [2024-11-17 03:29:14,163 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-17 03:29:14,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 520 events. 86/520 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2664 event pairs, 6 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2024-11-17 03:29:14,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 201 transitions, 442 flow [2024-11-17 03:29:14,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 201 transitions, 442 flow [2024-11-17 03:29:14,177 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:29:14,178 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;@2c9a4194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:29:14,179 INFO L334 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2024-11-17 03:29:14,180 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:29:14,180 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:29:14,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:29:14,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:14,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:29:14,181 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2024-11-17 03:29:14,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 25601122, now seen corresponding path program 1 times [2024-11-17 03:29:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825068927] [2024-11-17 03:29:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:14,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:14,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825068927] [2024-11-17 03:29:14,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825068927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:14,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:14,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:29:14,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864996846] [2024-11-17 03:29:14,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:14,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:14,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:14,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 201 [2024-11-17 03:29:14,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 201 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:14,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:14,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 201 [2024-11-17 03:29:14,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand