./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_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 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:09:55,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:09:55,128 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:09:55,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:09:55,136 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:09:55,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:09:55,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:09:55,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:09:55,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:09:55,172 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:09:55,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:09:55,173 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:09:55,173 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:09:55,174 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:09:55,174 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:09:55,175 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:09:55,175 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:09:55,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:09:55,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:09:55,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:09:55,177 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:09:55,181 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:09:55,181 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:09:55,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:09:55,182 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:09:55,182 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:09:55,182 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:09:55,183 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:09:55,183 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:09:55,183 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:09:55,183 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:09:55,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:09:55,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:09:55,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:09:55,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:09:55,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:09:55,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:09:55,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:09:55,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:09:55,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:09:55,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:09:55,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:09:55,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 [2024-11-10 18:09:55,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:09:55,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:09:55,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:09:55,537 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:09:55,538 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:09:55,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2024-11-10 18:09:57,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:09:57,376 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:09:57,377 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2024-11-10 18:09:57,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f7e9883/9a76690398a04ce5ae16ca008e676e3b/FLAGc9169967e [2024-11-10 18:09:57,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f7e9883/9a76690398a04ce5ae16ca008e676e3b [2024-11-10 18:09:57,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:09:57,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:09:57,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:09:57,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:09:57,713 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:09:57,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:09:57" (1/1) ... [2024-11-10 18:09:57,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e08779d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:57, skipping insertion in model container [2024-11-10 18:09:57,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:09:57" (1/1) ... [2024-11-10 18:09:57,775 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:09:58,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:09:58,385 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:09:58,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:09:58,526 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:09:58,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58 WrapperNode [2024-11-10 18:09:58,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:09:58,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:09:58,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:09:58,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:09:58,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,615 INFO L138 Inliner]: procedures = 271, calls = 110, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 266 [2024-11-10 18:09:58,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:09:58,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:09:58,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:09:58,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:09:58,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,651 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,690 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 2, 70]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 0, 60]. The 5 writes are split as follows [0, 0, 1, 4]. [2024-11-10 18:09:58,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,711 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,724 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:09:58,729 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:09:58,729 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:09:58,730 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:09:58,731 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (1/1) ... [2024-11-10 18:09:58,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:09:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:58,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:09:58,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:09:58,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:09:58,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:09:58,833 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:09:58,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:09:58,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:09:58,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:09:58,836 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:09:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:09:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:09:58,837 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:09:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:09:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:09:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:09:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:09:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:09:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:09:58,841 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:09:59,004 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:09:59,006 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:09:59,415 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L954: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:09:59,416 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L954-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:09:59,521 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:09:59,522 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:09:59,987 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:09:59,989 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:09:59,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:09:59 BoogieIcfgContainer [2024-11-10 18:09:59,990 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:09:59,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:09:59,994 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:09:59,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:09:59,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:09:57" (1/3) ... [2024-11-10 18:09:59,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@839c45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:09:59, skipping insertion in model container [2024-11-10 18:09:59,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:58" (2/3) ... [2024-11-10 18:10:00,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@839c45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:09:59, skipping insertion in model container [2024-11-10 18:10:00,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:09:59" (3/3) ... [2024-11-10 18:10:00,002 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2024-11-10 18:10:00,021 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:10:00,022 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-10 18:10:00,022 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:10:00,095 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:10:00,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 152 transitions, 311 flow [2024-11-10 18:10:00,232 INFO L124 PetriNetUnfolderBase]: 46/231 cut-off events. [2024-11-10 18:10:00,233 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:10:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 231 events. 46/231 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1122 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2024-11-10 18:10:00,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 152 transitions, 311 flow [2024-11-10 18:10:00,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 152 transitions, 311 flow [2024-11-10 18:10:00,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:10:00,272 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;@ccb9e3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:10:00,273 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-10 18:10:00,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:10:00,280 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:10:00,280 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:10:00,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:00,281 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:10:00,282 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:00,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -587646123, now seen corresponding path program 1 times [2024-11-10 18:10:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:00,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139196755] [2024-11-10 18:10:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:00,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:00,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139196755] [2024-11-10 18:10:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139196755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:00,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022716448] [2024-11-10 18:10:00,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:00,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:10:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:10:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:10:00,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 152 [2024-11-10 18:10:00,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 152 transitions, 311 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:00,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:00,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 152 [2024-11-10 18:10:00,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:00,993 INFO L124 PetriNetUnfolderBase]: 532/1966 cut-off events. [2024-11-10 18:10:00,994 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-10 18:10:01,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3025 conditions, 1966 events. 532/1966 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15712 event pairs, 483 based on Foata normal form. 563/2266 useless extension candidates. Maximal degree in co-relation 2918. Up to 1054 conditions per place. [2024-11-10 18:10:01,019 INFO L140 encePairwiseOnDemand]: 125/152 looper letters, 50 selfloop transitions, 0 changer transitions 0/123 dead transitions. [2024-11-10 18:10:01,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 353 flow [2024-11-10 18:10:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 18:10:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 18:10:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2024-11-10 18:10:01,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7335526315789473 [2024-11-10 18:10:01,037 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 311 flow. Second operand 2 states and 223 transitions. [2024-11-10 18:10:01,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 353 flow [2024-11-10 18:10:01,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:10:01,046 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 253 flow [2024-11-10 18:10:01,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=253, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2024-11-10 18:10:01,053 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, -1 predicate places. [2024-11-10 18:10:01,056 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 253 flow [2024-11-10 18:10:01,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:01,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:01,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:01,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:10:01,058 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:01,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -998620310, now seen corresponding path program 1 times [2024-11-10 18:10:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:01,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453770521] [2024-11-10 18:10:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:01,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453770521] [2024-11-10 18:10:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453770521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:01,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:01,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721050113] [2024-11-10 18:10:01,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:01,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:01,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-10 18:10:01,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 123 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:01,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:01,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-10 18:10:01,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:01,602 INFO L124 PetriNetUnfolderBase]: 532/1968 cut-off events. [2024-11-10 18:10:01,602 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-10 18:10:01,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 1968 events. 532/1968 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15722 event pairs, 483 based on Foata normal form. 0/1704 useless extension candidates. Maximal degree in co-relation 3026. Up to 1055 conditions per place. [2024-11-10 18:10:01,616 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-11-10 18:10:01,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 124 transitions, 359 flow [2024-11-10 18:10:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-11-10 18:10:01,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5899122807017544 [2024-11-10 18:10:01,619 INFO L175 Difference]: Start difference. First operand has 123 places, 123 transitions, 253 flow. Second operand 3 states and 269 transitions. [2024-11-10 18:10:01,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 124 transitions, 359 flow [2024-11-10 18:10:01,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 124 transitions, 359 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:10:01,624 INFO L231 Difference]: Finished difference. Result has 126 places, 124 transitions, 265 flow [2024-11-10 18:10:01,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2024-11-10 18:10:01,626 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 2 predicate places. [2024-11-10 18:10:01,626 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 265 flow [2024-11-10 18:10:01,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:01,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:01,627 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:01,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:10:01,627 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:01,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash -376829184, now seen corresponding path program 1 times [2024-11-10 18:10:01,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212662789] [2024-11-10 18:10:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:01,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212662789] [2024-11-10 18:10:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212662789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047914411] [2024-11-10 18:10:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:01,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:01,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:01,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:10:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:01,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 18:10:01,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:01,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:10:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047914411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:10:01,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:10:01,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-10 18:10:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839663771] [2024-11-10 18:10:01,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:10:01,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:10:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:10:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:10:01,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-10 18:10:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:01,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-10 18:10:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:02,392 INFO L124 PetriNetUnfolderBase]: 532/1974 cut-off events. [2024-11-10 18:10:02,392 INFO L125 PetriNetUnfolderBase]: For 10/11 co-relation queries the response was YES. [2024-11-10 18:10:02,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 1974 events. 532/1974 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15735 event pairs, 483 based on Foata normal form. 0/1710 useless extension candidates. Maximal degree in co-relation 3043. Up to 1055 conditions per place. [2024-11-10 18:10:02,409 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2024-11-10 18:10:02,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 387 flow [2024-11-10 18:10:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:10:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:10:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2024-11-10 18:10:02,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5372807017543859 [2024-11-10 18:10:02,413 INFO L175 Difference]: Start difference. First operand has 126 places, 124 transitions, 265 flow. Second operand 6 states and 490 transitions. [2024-11-10 18:10:02,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 387 flow [2024-11-10 18:10:02,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 127 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:02,420 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 299 flow [2024-11-10 18:10:02,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2024-11-10 18:10:02,422 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 9 predicate places. [2024-11-10 18:10:02,423 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 299 flow [2024-11-10 18:10:02,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:02,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:02,423 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-10 18:10:02,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:02,624 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:02,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -526282558, now seen corresponding path program 2 times [2024-11-10 18:10:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498368091] [2024-11-10 18:10:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:10:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498368091] [2024-11-10 18:10:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498368091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146137756] [2024-11-10 18:10:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:02,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:02,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 152 [2024-11-10 18:10:02,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:02,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:02,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 152 [2024-11-10 18:10:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:03,126 INFO L124 PetriNetUnfolderBase]: 576/2046 cut-off events. [2024-11-10 18:10:03,126 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-10 18:10:03,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3223 conditions, 2046 events. 576/2046 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 16165 event pairs, 483 based on Foata normal form. 0/1818 useless extension candidates. Maximal degree in co-relation 3214. Up to 1050 conditions per place. [2024-11-10 18:10:03,142 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 75 selfloop transitions, 2 changer transitions 0/146 dead transitions. [2024-11-10 18:10:03,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 146 transitions, 491 flow [2024-11-10 18:10:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-10 18:10:03,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-11-10 18:10:03,145 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 299 flow. Second operand 3 states and 282 transitions. [2024-11-10 18:10:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 146 transitions, 491 flow [2024-11-10 18:10:03,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 483 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:03,154 INFO L231 Difference]: Finished difference. Result has 132 places, 125 transitions, 291 flow [2024-11-10 18:10:03,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=132, PETRI_TRANSITIONS=125} [2024-11-10 18:10:03,156 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 8 predicate places. [2024-11-10 18:10:03,157 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 125 transitions, 291 flow [2024-11-10 18:10:03,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:03,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:03,158 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:03,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:10:03,159 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:03,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash -526282557, now seen corresponding path program 1 times [2024-11-10 18:10:03,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:03,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859860044] [2024-11-10 18:10:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:03,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:10:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:03,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859860044] [2024-11-10 18:10:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859860044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:03,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831201252] [2024-11-10 18:10:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:03,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:03,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:03,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 152 [2024-11-10 18:10:03,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 125 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:03,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:03,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 152 [2024-11-10 18:10:03,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:03,702 INFO L124 PetriNetUnfolderBase]: 596/2150 cut-off events. [2024-11-10 18:10:03,702 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-10 18:10:03,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3368 conditions, 2150 events. 596/2150 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 17114 event pairs, 375 based on Foata normal form. 1/1872 useless extension candidates. Maximal degree in co-relation 3358. Up to 1143 conditions per place. [2024-11-10 18:10:03,717 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 77 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-11-10 18:10:03,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 147 transitions, 493 flow [2024-11-10 18:10:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-10 18:10:03,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6293859649122807 [2024-11-10 18:10:03,719 INFO L175 Difference]: Start difference. First operand has 132 places, 125 transitions, 291 flow. Second operand 3 states and 287 transitions. [2024-11-10 18:10:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 147 transitions, 493 flow [2024-11-10 18:10:03,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 147 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:10:03,724 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 297 flow [2024-11-10 18:10:03,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=133, PETRI_TRANSITIONS=125} [2024-11-10 18:10:03,725 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 9 predicate places. [2024-11-10 18:10:03,725 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 297 flow [2024-11-10 18:10:03,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:03,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:03,725 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:03,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:10:03,726 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:03,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1981225731, now seen corresponding path program 1 times [2024-11-10 18:10:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961046833] [2024-11-10 18:10:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:03,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:03,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961046833] [2024-11-10 18:10:03,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961046833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955159684] [2024-11-10 18:10:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:03,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:03,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:03,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:10:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:03,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:10:03,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:03,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:10:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:04,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955159684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:10:04,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:10:04,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 18:10:04,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53387998] [2024-11-10 18:10:04,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:10:04,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:10:04,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:10:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:10:04,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-10 18:10:04,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 297 flow. Second operand has 13 states, 13 states have (on average 73.38461538461539) internal successors, (954), 13 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:04,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:04,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-10 18:10:04,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:04,415 INFO L124 PetriNetUnfolderBase]: 530/1952 cut-off events. [2024-11-10 18:10:04,415 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2024-11-10 18:10:04,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3087 conditions, 1952 events. 530/1952 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15271 event pairs, 483 based on Foata normal form. 6/1712 useless extension candidates. Maximal degree in co-relation 3076. Up to 1036 conditions per place. [2024-11-10 18:10:04,431 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2024-11-10 18:10:04,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 131 transitions, 455 flow [2024-11-10 18:10:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:10:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:10:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 931 transitions. [2024-11-10 18:10:04,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-10 18:10:04,435 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 297 flow. Second operand 12 states and 931 transitions. [2024-11-10 18:10:04,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 131 transitions, 455 flow [2024-11-10 18:10:04,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 131 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:10:04,439 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 377 flow [2024-11-10 18:10:04,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2024-11-10 18:10:04,440 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 24 predicate places. [2024-11-10 18:10:04,440 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 377 flow [2024-11-10 18:10:04,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.38461538461539) internal successors, (954), 13 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:04,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:04,441 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:04,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:10:04,645 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,SelfDestructingSolverStorable5 [2024-11-10 18:10:04,646 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:04,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash 684460153, now seen corresponding path program 2 times [2024-11-10 18:10:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:04,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685853077] [2024-11-10 18:10:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:04,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685853077] [2024-11-10 18:10:04,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685853077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350273263] [2024-11-10 18:10:04,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:10:04,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:04,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:04,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:04,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:10:04,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:10:04,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:10:04,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:10:04,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:05,025 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 [2024-11-10 18:10:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:05,166 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:10:05,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350273263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:05,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:10:05,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-10 18:10:05,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352195464] [2024-11-10 18:10:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:05,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:10:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:10:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:10:05,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 152 [2024-11-10 18:10:05,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:05,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:05,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 152 [2024-11-10 18:10:05,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:05,654 INFO L124 PetriNetUnfolderBase]: 549/1999 cut-off events. [2024-11-10 18:10:05,655 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-10 18:10:05,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3229 conditions, 1999 events. 549/1999 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15843 event pairs, 0 based on Foata normal form. 22/1810 useless extension candidates. Maximal degree in co-relation 3212. Up to 963 conditions per place. [2024-11-10 18:10:05,674 INFO L140 encePairwiseOnDemand]: 147/152 looper letters, 122 selfloop transitions, 4 changer transitions 0/194 dead transitions. [2024-11-10 18:10:05,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 194 transitions, 753 flow [2024-11-10 18:10:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:10:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:10:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 467 transitions. [2024-11-10 18:10:05,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144736842105263 [2024-11-10 18:10:05,678 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 377 flow. Second operand 5 states and 467 transitions. [2024-11-10 18:10:05,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 194 transitions, 753 flow [2024-11-10 18:10:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 194 transitions, 717 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-10 18:10:05,686 INFO L231 Difference]: Finished difference. Result has 147 places, 131 transitions, 352 flow [2024-11-10 18:10:05,688 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=147, PETRI_TRANSITIONS=131} [2024-11-10 18:10:05,689 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 23 predicate places. [2024-11-10 18:10:05,689 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 131 transitions, 352 flow [2024-11-10 18:10:05,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:05,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:05,692 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:05,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:10:05,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:05,893 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:10:05,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -256571046, now seen corresponding path program 1 times [2024-11-10 18:10:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:05,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661194377] [2024-11-10 18:10:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:05,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:10:05,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:10:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:10:05,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:10:05,979 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:10:05,980 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-10 18:10:05,984 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-10 18:10:05,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-10 18:10:05,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-10 18:10:05,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-10 18:10:05,985 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-10 18:10:05,986 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-10 18:10:05,987 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-10 18:10:05,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-10 18:10:05,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-10 18:10:05,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-10 18:10:05,988 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-10 18:10:05,992 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-10 18:10:05,992 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-10 18:10:05,993 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-10 18:10:05,994 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-10 18:10:05,994 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-10 18:10:05,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:10:05,994 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-10 18:10:05,998 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:10:05,998 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:10:06,059 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:10:06,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 216 transitions, 448 flow [2024-11-10 18:10:06,098 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-11-10 18:10:06,098 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:10:06,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 389 events. 77/389 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2144 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 233. Up to 12 conditions per place. [2024-11-10 18:10:06,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 216 transitions, 448 flow [2024-11-10 18:10:06,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 216 transitions, 448 flow [2024-11-10 18:10:06,113 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:10:06,113 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;@ccb9e3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:10:06,114 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-10 18:10:06,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:10:06,116 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:10:06,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:10:06,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:06,117 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:10:06,117 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:06,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1507413077, now seen corresponding path program 1 times [2024-11-10 18:10:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:06,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078956634] [2024-11-10 18:10:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:06,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078956634] [2024-11-10 18:10:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078956634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:06,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:06,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:06,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090770580] [2024-11-10 18:10:06,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:06,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:10:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:10:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:10:06,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 216 [2024-11-10 18:10:06,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 216 transitions, 448 flow. Second operand has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:06,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:06,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 216 [2024-11-10 18:10:06,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:11,585 INFO L124 PetriNetUnfolderBase]: 23919/54834 cut-off events. [2024-11-10 18:10:11,585 INFO L125 PetriNetUnfolderBase]: For 156/189 co-relation queries the response was YES. [2024-11-10 18:10:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90347 conditions, 54834 events. 23919/54834 cut-off events. For 156/189 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 630137 event pairs, 22302 based on Foata normal form. 18341/66876 useless extension candidates. Maximal degree in co-relation 87054. Up to 35396 conditions per place. [2024-11-10 18:10:12,083 INFO L140 encePairwiseOnDemand]: 177/216 looper letters, 73 selfloop transitions, 0 changer transitions 0/174 dead transitions. [2024-11-10 18:10:12,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 510 flow [2024-11-10 18:10:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 18:10:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 18:10:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 314 transitions. [2024-11-10 18:10:12,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7268518518518519 [2024-11-10 18:10:12,086 INFO L175 Difference]: Start difference. First operand has 176 places, 216 transitions, 448 flow. Second operand 2 states and 314 transitions. [2024-11-10 18:10:12,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 510 flow [2024-11-10 18:10:12,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:10:12,091 INFO L231 Difference]: Finished difference. Result has 174 places, 174 transitions, 364 flow [2024-11-10 18:10:12,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=364, PETRI_PLACES=174, PETRI_TRANSITIONS=174} [2024-11-10 18:10:12,094 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, -2 predicate places. [2024-11-10 18:10:12,094 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 174 transitions, 364 flow [2024-11-10 18:10:12,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:12,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:12,095 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:12,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:10:12,095 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:12,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:12,097 INFO L85 PathProgramCache]: Analyzing trace with hash -476294334, now seen corresponding path program 1 times [2024-11-10 18:10:12,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:12,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454141894] [2024-11-10 18:10:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:12,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:12,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454141894] [2024-11-10 18:10:12,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454141894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:12,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:12,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800883184] [2024-11-10 18:10:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:12,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:12,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-10 18:10:12,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 174 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:12,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:12,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-10 18:10:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:16,509 INFO L124 PetriNetUnfolderBase]: 23919/54836 cut-off events. [2024-11-10 18:10:16,509 INFO L125 PetriNetUnfolderBase]: For 156/189 co-relation queries the response was YES. [2024-11-10 18:10:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90352 conditions, 54836 events. 23919/54836 cut-off events. For 156/189 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 630314 event pairs, 22302 based on Foata normal form. 0/48536 useless extension candidates. Maximal degree in co-relation 90347. Up to 35397 conditions per place. [2024-11-10 18:10:16,908 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 73 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2024-11-10 18:10:16,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 516 flow [2024-11-10 18:10:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2024-11-10 18:10:16,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2024-11-10 18:10:16,912 INFO L175 Difference]: Start difference. First operand has 174 places, 174 transitions, 364 flow. Second operand 3 states and 376 transitions. [2024-11-10 18:10:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 516 flow [2024-11-10 18:10:16,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 516 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:10:16,916 INFO L231 Difference]: Finished difference. Result has 177 places, 175 transitions, 376 flow [2024-11-10 18:10:16,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=177, PETRI_TRANSITIONS=175} [2024-11-10 18:10:16,918 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 1 predicate places. [2024-11-10 18:10:16,918 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 376 flow [2024-11-10 18:10:16,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:16,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:16,919 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:16,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:10:16,919 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:16,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash -932732968, now seen corresponding path program 1 times [2024-11-10 18:10:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:16,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927549512] [2024-11-10 18:10:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:16,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:16,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927549512] [2024-11-10 18:10:16,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927549512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330981310] [2024-11-10 18:10:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:16,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:16,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:16,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:10:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:17,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 18:10:17,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:17,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:10:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330981310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:10:17,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:10:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-10 18:10:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432337685] [2024-11-10 18:10:17,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:10:17,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:10:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:10:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:10:17,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-10 18:10:17,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:17,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:17,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-10 18:10:17,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:21,839 INFO L124 PetriNetUnfolderBase]: 23919/54842 cut-off events. [2024-11-10 18:10:21,839 INFO L125 PetriNetUnfolderBase]: For 161/194 co-relation queries the response was YES. [2024-11-10 18:10:22,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90371 conditions, 54842 events. 23919/54842 cut-off events. For 161/194 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 630310 event pairs, 22302 based on Foata normal form. 0/48542 useless extension candidates. Maximal degree in co-relation 90364. Up to 35397 conditions per place. [2024-11-10 18:10:22,302 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 73 selfloop transitions, 5 changer transitions 0/178 dead transitions. [2024-11-10 18:10:22,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 544 flow [2024-11-10 18:10:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:10:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:10:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2024-11-10 18:10:22,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-11-10 18:10:22,306 INFO L175 Difference]: Start difference. First operand has 177 places, 175 transitions, 376 flow. Second operand 6 states and 681 transitions. [2024-11-10 18:10:22,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 544 flow [2024-11-10 18:10:22,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 178 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:22,314 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 410 flow [2024-11-10 18:10:22,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2024-11-10 18:10:22,315 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 8 predicate places. [2024-11-10 18:10:22,316 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 410 flow [2024-11-10 18:10:22,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:22,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:22,317 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:22,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:10:22,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:22,518 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:22,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1625148262, now seen corresponding path program 2 times [2024-11-10 18:10:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:22,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741622898] [2024-11-10 18:10:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:10:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741622898] [2024-11-10 18:10:22,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741622898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:22,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:22,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260909080] [2024-11-10 18:10:22,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:22,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:22,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:22,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2024-11-10 18:10:22,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:22,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:22,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2024-11-10 18:10:22,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:27,619 INFO L124 PetriNetUnfolderBase]: 25883/58066 cut-off events. [2024-11-10 18:10:27,619 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-11-10 18:10:27,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96576 conditions, 58066 events. 25883/58066 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 1642. Compared 661122 event pairs, 22281 based on Foata normal form. 0/52060 useless extension candidates. Maximal degree in co-relation 96566. Up to 35317 conditions per place. [2024-11-10 18:10:28,063 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 119 selfloop transitions, 2 changer transitions 0/218 dead transitions. [2024-11-10 18:10:28,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 732 flow [2024-11-10 18:10:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2024-11-10 18:10:28,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6327160493827161 [2024-11-10 18:10:28,065 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 410 flow. Second operand 3 states and 410 transitions. [2024-11-10 18:10:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 732 flow [2024-11-10 18:10:28,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 218 transitions, 724 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:28,069 INFO L231 Difference]: Finished difference. Result has 183 places, 176 transitions, 402 flow [2024-11-10 18:10:28,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=183, PETRI_TRANSITIONS=176} [2024-11-10 18:10:28,070 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 7 predicate places. [2024-11-10 18:10:28,070 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 176 transitions, 402 flow [2024-11-10 18:10:28,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:28,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:28,071 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:28,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:10:28,071 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:28,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1625148261, now seen corresponding path program 1 times [2024-11-10 18:10:28,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:28,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144841745] [2024-11-10 18:10:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:28,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:10:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144841745] [2024-11-10 18:10:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144841745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:28,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703832833] [2024-11-10 18:10:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:28,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:28,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2024-11-10 18:10:28,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 176 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:28,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:28,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2024-11-10 18:10:28,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:33,439 INFO L124 PetriNetUnfolderBase]: 26266/61060 cut-off events. [2024-11-10 18:10:33,439 INFO L125 PetriNetUnfolderBase]: For 820/842 co-relation queries the response was YES. [2024-11-10 18:10:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100986 conditions, 61060 events. 26266/61060 cut-off events. For 820/842 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 717205 event pairs, 12096 based on Foata normal form. 1/54282 useless extension candidates. Maximal degree in co-relation 100975. Up to 39233 conditions per place. [2024-11-10 18:10:33,903 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 101 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2024-11-10 18:10:33,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 654 flow [2024-11-10 18:10:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2024-11-10 18:10:33,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6095679012345679 [2024-11-10 18:10:33,905 INFO L175 Difference]: Start difference. First operand has 183 places, 176 transitions, 402 flow. Second operand 3 states and 395 transitions. [2024-11-10 18:10:33,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 654 flow [2024-11-10 18:10:33,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 199 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:10:33,947 INFO L231 Difference]: Finished difference. Result has 184 places, 177 transitions, 412 flow [2024-11-10 18:10:33,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=184, PETRI_TRANSITIONS=177} [2024-11-10 18:10:33,948 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 8 predicate places. [2024-11-10 18:10:33,948 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 177 transitions, 412 flow [2024-11-10 18:10:33,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:33,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:33,949 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:33,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:10:33,949 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:33,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2120227781, now seen corresponding path program 1 times [2024-11-10 18:10:33,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:33,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445018141] [2024-11-10 18:10:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:33,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:34,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:34,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445018141] [2024-11-10 18:10:34,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445018141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:34,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500739729] [2024-11-10 18:10:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:34,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:34,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:10:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:34,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:10:34,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:34,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:10:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:34,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500739729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:10:34,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:10:34,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 18:10:34,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796844611] [2024-11-10 18:10:34,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:10:34,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:10:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:34,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:10:34,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:10:34,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-10 18:10:34,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 177 transitions, 412 flow. Second operand has 13 states, 13 states have (on average 101.38461538461539) internal successors, (1318), 13 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:34,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:34,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-10 18:10:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:39,421 INFO L124 PetriNetUnfolderBase]: 23917/55583 cut-off events. [2024-11-10 18:10:39,421 INFO L125 PetriNetUnfolderBase]: For 857/883 co-relation queries the response was YES. [2024-11-10 18:10:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91721 conditions, 55583 events. 23917/55583 cut-off events. For 857/883 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 642529 event pairs, 22302 based on Foata normal form. 6/49383 useless extension candidates. Maximal degree in co-relation 91709. Up to 35397 conditions per place. [2024-11-10 18:10:40,225 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 74 selfloop transitions, 11 changer transitions 0/183 dead transitions. [2024-11-10 18:10:40,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 183 transitions, 618 flow [2024-11-10 18:10:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:10:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:10:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1290 transitions. [2024-11-10 18:10:40,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-11-10 18:10:40,230 INFO L175 Difference]: Start difference. First operand has 184 places, 177 transitions, 412 flow. Second operand 12 states and 1290 transitions. [2024-11-10 18:10:40,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 183 transitions, 618 flow [2024-11-10 18:10:40,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 183 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:40,236 INFO L231 Difference]: Finished difference. Result has 200 places, 183 transitions, 494 flow [2024-11-10 18:10:40,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=200, PETRI_TRANSITIONS=183} [2024-11-10 18:10:40,237 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 24 predicate places. [2024-11-10 18:10:40,237 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 183 transitions, 494 flow [2024-11-10 18:10:40,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 101.38461538461539) internal successors, (1318), 13 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:40,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:40,238 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:40,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 18:10:40,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 18:10:40,439 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:40,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 481126839, now seen corresponding path program 2 times [2024-11-10 18:10:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:40,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863798653] [2024-11-10 18:10:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:40,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:40,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863798653] [2024-11-10 18:10:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863798653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619245327] [2024-11-10 18:10:40,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:10:40,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:40,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:40,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:10:40,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:10:40,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:10:40,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:10:40,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:40,892 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 [2024-11-10 18:10:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:40,971 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:10:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619245327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:40,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:10:40,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-10 18:10:40,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579368313] [2024-11-10 18:10:40,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:40,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:10:40,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:10:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:10:41,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2024-11-10 18:10:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 183 transitions, 494 flow. Second operand has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:41,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:41,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2024-11-10 18:10:41,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:46,527 INFO L124 PetriNetUnfolderBase]: 24767/57237 cut-off events. [2024-11-10 18:10:46,527 INFO L125 PetriNetUnfolderBase]: For 1810/1810 co-relation queries the response was YES. [2024-11-10 18:10:46,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95932 conditions, 57237 events. 24767/57237 cut-off events. For 1810/1810 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 669384 event pairs, 462 based on Foata normal form. 506/52203 useless extension candidates. Maximal degree in co-relation 95914. Up to 32177 conditions per place. [2024-11-10 18:10:47,113 INFO L140 encePairwiseOnDemand]: 211/216 looper letters, 187 selfloop transitions, 5 changer transitions 0/288 dead transitions. [2024-11-10 18:10:47,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 288 transitions, 1086 flow [2024-11-10 18:10:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:10:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:10:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2024-11-10 18:10:47,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6231481481481481 [2024-11-10 18:10:47,116 INFO L175 Difference]: Start difference. First operand has 200 places, 183 transitions, 494 flow. Second operand 5 states and 673 transitions. [2024-11-10 18:10:47,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 288 transitions, 1086 flow [2024-11-10 18:10:47,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 288 transitions, 1050 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-10 18:10:47,125 INFO L231 Difference]: Finished difference. Result has 199 places, 183 transitions, 472 flow [2024-11-10 18:10:47,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=472, PETRI_PLACES=199, PETRI_TRANSITIONS=183} [2024-11-10 18:10:47,127 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 23 predicate places. [2024-11-10 18:10:47,127 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 183 transitions, 472 flow [2024-11-10 18:10:47,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:47,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:47,128 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:47,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:10:47,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:10:47,329 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:47,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:47,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1072332465, now seen corresponding path program 1 times [2024-11-10 18:10:47,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:47,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135584726] [2024-11-10 18:10:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:47,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:47,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135584726] [2024-11-10 18:10:47,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135584726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:47,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:47,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:10:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579807655] [2024-11-10 18:10:47,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:47,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:10:47,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:10:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:10:47,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 216 [2024-11-10 18:10:47,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 183 transitions, 472 flow. Second operand has 6 states, 6 states have (on average 91.16666666666667) internal successors, (547), 6 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:47,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:47,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 216 [2024-11-10 18:10:47,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:52,963 INFO L124 PetriNetUnfolderBase]: 26319/54753 cut-off events. [2024-11-10 18:10:52,964 INFO L125 PetriNetUnfolderBase]: For 3770/4264 co-relation queries the response was YES. [2024-11-10 18:10:53,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96776 conditions, 54753 events. 26319/54753 cut-off events. For 3770/4264 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 598375 event pairs, 598 based on Foata normal form. 494/52876 useless extension candidates. Maximal degree in co-relation 96757. Up to 33778 conditions per place. [2024-11-10 18:10:53,505 INFO L140 encePairwiseOnDemand]: 198/216 looper letters, 207 selfloop transitions, 9 changer transitions 0/302 dead transitions. [2024-11-10 18:10:53,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 302 transitions, 1163 flow [2024-11-10 18:10:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:10:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:10:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2024-11-10 18:10:53,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-10 18:10:53,507 INFO L175 Difference]: Start difference. First operand has 199 places, 183 transitions, 472 flow. Second operand 5 states and 666 transitions. [2024-11-10 18:10:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 302 transitions, 1163 flow [2024-11-10 18:10:53,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 302 transitions, 1154 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-10 18:10:53,515 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 534 flow [2024-11-10 18:10:53,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=534, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2024-11-10 18:10:53,515 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 24 predicate places. [2024-11-10 18:10:53,516 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 534 flow [2024-11-10 18:10:53,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.16666666666667) internal successors, (547), 6 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:53,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:53,516 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:53,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:10:53,517 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:53,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1072332464, now seen corresponding path program 1 times [2024-11-10 18:10:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520379339] [2024-11-10 18:10:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:53,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:53,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520379339] [2024-11-10 18:10:53,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520379339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:53,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:53,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:10:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636756050] [2024-11-10 18:10:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:53,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:10:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:10:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 18:10:54,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 216 [2024-11-10 18:10:54,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 534 flow. Second operand has 6 states, 6 states have (on average 91.16666666666667) internal successors, (547), 6 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:54,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:54,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 216 [2024-11-10 18:10:54,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand