./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 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_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-3289d67-m [2024-11-17 03:29:17,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:29:17,639 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:29:17,645 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:29:17,646 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:29:17,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:29:17,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:29:17,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:29:17,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:29:17,673 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:29:17,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:29:17,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:29:17,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:29:17,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:29:17,676 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:29:17,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:29:17,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:29:17,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:29:17,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:29:17,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:29:17,677 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:29:17,678 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:29:17,679 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:29:17,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:29:17,679 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:29:17,679 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:29:17,680 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:29:17,680 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:29:17,680 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:29:17,680 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:29:17,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:29:17,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:29:17,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:29:17,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:29:17,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:29:17,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:29:17,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:29:17,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:29:17,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:29:17,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:29:17,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:29:17,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:29:17,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53e3b4cf7a6885129025777f14c3b33a959debd694827832fbe127376cb0a5f9 [2024-11-17 03:29:17,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:29:17,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:29:17,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:29:17,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:29:17,913 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:29:17,914 INFO L431 ainManager$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 [2024-11-17 03:29:19,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:29:19,545 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:29:19,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2024-11-17 03:29:19,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be31499ff/651aa23f7ef846d2a5a0904f8b954c80/FLAGb184e8f2d [2024-11-17 03:29:19,842 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be31499ff/651aa23f7ef846d2a5a0904f8b954c80 [2024-11-17 03:29:19,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:29:19,846 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:29:19,849 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:29:19,849 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:29:19,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:29:19,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:29:19" (1/1) ... [2024-11-17 03:29:19,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f36509f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:19, skipping insertion in model container [2024-11-17 03:29:19,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:29:19" (1/1) ... [2024-11-17 03:29:19,901 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:29:20,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:29:20,351 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:29:20,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:29:20,502 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:29:20,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20 WrapperNode [2024-11-17 03:29:20,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:29:20,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:29:20,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:29:20,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:29:20,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,594 INFO L138 Inliner]: procedures = 271, calls = 110, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 266 [2024-11-17 03:29:20,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:29:20,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:29:20,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:29:20,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:29:20,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,609 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,613 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,641 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 70, 5, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 60, 5, 0]. The 5 writes are split as follows [0, 4, 0, 1]. [2024-11-17 03:29:20,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,664 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:29:20,679 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:29:20,679 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:29:20,679 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:29:20,680 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (1/1) ... [2024-11-17 03:29:20,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:29:20,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:20,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:29:20,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:29:20,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:29:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:29:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:29:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:29:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:29:20,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:29:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:29:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:29:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:29:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:29:20,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:29:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:29:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:29:20,759 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:29:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:29:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:29:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:29:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:29:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:29:20,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:29:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:29:20,762 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:29:20,905 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:29:20,907 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:29:21,264 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L954: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-17 03:29:21,264 INFO L1250 $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 [2024-11-17 03:29:21,343 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:29:21,343 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:29:21,677 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:29:21,678 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:29:21,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:29:21 BoogieIcfgContainer [2024-11-17 03:29:21,679 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:29:21,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:29:21,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:29:21,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:29:21,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:29:19" (1/3) ... [2024-11-17 03:29:21,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12689e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:29:21, skipping insertion in model container [2024-11-17 03:29:21,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:29:20" (2/3) ... [2024-11-17 03:29:21,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12689e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:29:21, skipping insertion in model container [2024-11-17 03:29:21,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:29:21" (3/3) ... [2024-11-17 03:29:21,687 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2024-11-17 03:29:21,700 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:29:21,701 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-17 03:29:21,701 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:29:21,754 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-17 03:29:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 152 transitions, 311 flow [2024-11-17 03:29:21,846 INFO L124 PetriNetUnfolderBase]: 46/231 cut-off events. [2024-11-17 03:29:21,846 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:29:21,853 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. [2024-11-17 03:29:21,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 152 transitions, 311 flow [2024-11-17 03:29:21,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 152 transitions, 311 flow [2024-11-17 03:29:21,872 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:29:21,879 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;@68193062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:29:21,879 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-17 03:29:21,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:29:21,884 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-17 03:29:21,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:29:21,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:21,886 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:29:21,886 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)] === [2024-11-17 03:29:21,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -587646123, now seen corresponding path program 1 times [2024-11-17 03:29:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118614914] [2024-11-17 03:29:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:22,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118614914] [2024-11-17 03:29:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118614914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:22,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:22,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541492545] [2024-11-17 03:29:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:22,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-17 03:29:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-17 03:29:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-17 03:29:22,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 152 [2024-11-17 03:29:22,159 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) [2024-11-17 03:29:22,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:22,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 152 [2024-11-17 03:29:22,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:22,533 INFO L124 PetriNetUnfolderBase]: 532/1966 cut-off events. [2024-11-17 03:29:22,533 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-17 03:29:22,543 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. [2024-11-17 03:29:22,554 INFO L140 encePairwiseOnDemand]: 125/152 looper letters, 50 selfloop transitions, 0 changer transitions 0/123 dead transitions. [2024-11-17 03:29:22,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 353 flow [2024-11-17 03:29:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-17 03:29:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-17 03:29:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2024-11-17 03:29:22,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7335526315789473 [2024-11-17 03:29:22,576 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 311 flow. Second operand 2 states and 223 transitions. [2024-11-17 03:29:22,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 353 flow [2024-11-17 03:29:22,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:29:22,590 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 253 flow [2024-11-17 03:29:22,598 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} [2024-11-17 03:29:22,602 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, -1 predicate places. [2024-11-17 03:29:22,602 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 253 flow [2024-11-17 03:29:22,602 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) [2024-11-17 03:29:22,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:22,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:22,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:29:22,603 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)] === [2024-11-17 03:29:22,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash -998620310, now seen corresponding path program 1 times [2024-11-17 03:29:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322751252] [2024-11-17 03:29:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:22,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:22,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322751252] [2024-11-17 03:29:22,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322751252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:22,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:22,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375786512] [2024-11-17 03:29:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:22,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:22,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:22,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-17 03:29:22,723 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) [2024-11-17 03:29:22,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:22,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-17 03:29:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:22,957 INFO L124 PetriNetUnfolderBase]: 532/1968 cut-off events. [2024-11-17 03:29:22,958 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-17 03:29:22,960 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. [2024-11-17 03:29:22,965 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-11-17 03:29:22,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 124 transitions, 359 flow [2024-11-17 03:29:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-11-17 03:29:22,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5899122807017544 [2024-11-17 03:29:22,968 INFO L175 Difference]: Start difference. First operand has 123 places, 123 transitions, 253 flow. Second operand 3 states and 269 transitions. [2024-11-17 03:29:22,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 124 transitions, 359 flow [2024-11-17 03:29:22,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 124 transitions, 359 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:29:22,972 INFO L231 Difference]: Finished difference. Result has 126 places, 124 transitions, 265 flow [2024-11-17 03:29:22,972 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} [2024-11-17 03:29:22,973 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 2 predicate places. [2024-11-17 03:29:22,973 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 265 flow [2024-11-17 03:29:22,973 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) [2024-11-17 03:29:22,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:22,973 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:22,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:29:22,974 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)] === [2024-11-17 03:29:22,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash -376829184, now seen corresponding path program 1 times [2024-11-17 03:29:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:22,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677106166] [2024-11-17 03:29:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:23,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677106166] [2024-11-17 03:29:23,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677106166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717393505] [2024-11-17 03:29:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:23,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:23,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:29:23,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:29:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:23,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-17 03:29:23,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:23,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717393505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:23,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-17 03:29:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373267849] [2024-11-17 03:29:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:23,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:29:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:29:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:29:23,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-17 03:29:23,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 265 flow. Second operand has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:23,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:23,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-17 03:29:23,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:23,548 INFO L124 PetriNetUnfolderBase]: 532/1974 cut-off events. [2024-11-17 03:29:23,549 INFO L125 PetriNetUnfolderBase]: For 10/11 co-relation queries the response was YES. [2024-11-17 03:29:23,552 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. [2024-11-17 03:29:23,558 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2024-11-17 03:29:23,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 387 flow [2024-11-17 03:29:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:29:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:29:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2024-11-17 03:29:23,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5372807017543859 [2024-11-17 03:29:23,562 INFO L175 Difference]: Start difference. First operand has 126 places, 124 transitions, 265 flow. Second operand 6 states and 490 transitions. [2024-11-17 03:29:23,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 387 flow [2024-11-17 03:29:23,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 127 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:23,566 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 299 flow [2024-11-17 03:29:23,567 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} [2024-11-17 03:29:23,568 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 9 predicate places. [2024-11-17 03:29:23,569 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 299 flow [2024-11-17 03:29:23,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.33333333333333) internal successors, (440), 6 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:23,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:23,570 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:23,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:29:23,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:23,771 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)] === [2024-11-17 03:29:23,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:23,771 INFO L85 PathProgramCache]: Analyzing trace with hash -526282558, now seen corresponding path program 2 times [2024-11-17 03:29:23,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:23,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617576119] [2024-11-17 03:29:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-17 03:29:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617576119] [2024-11-17 03:29:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617576119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941461717] [2024-11-17 03:29:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:23,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:23,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 152 [2024-11-17 03:29:23,909 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) [2024-11-17 03:29:23,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:23,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 152 [2024-11-17 03:29:23,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:24,170 INFO L124 PetriNetUnfolderBase]: 576/2046 cut-off events. [2024-11-17 03:29:24,171 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-17 03:29:24,174 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. [2024-11-17 03:29:24,181 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 75 selfloop transitions, 2 changer transitions 0/146 dead transitions. [2024-11-17 03:29:24,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 146 transitions, 491 flow [2024-11-17 03:29:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-17 03:29:24,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-11-17 03:29:24,183 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 299 flow. Second operand 3 states and 282 transitions. [2024-11-17 03:29:24,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 146 transitions, 491 flow [2024-11-17 03:29:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 483 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:24,188 INFO L231 Difference]: Finished difference. Result has 132 places, 125 transitions, 291 flow [2024-11-17 03:29:24,189 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} [2024-11-17 03:29:24,190 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 8 predicate places. [2024-11-17 03:29:24,190 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 125 transitions, 291 flow [2024-11-17 03:29:24,191 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) [2024-11-17 03:29:24,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:24,191 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:24,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:29:24,191 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)] === [2024-11-17 03:29:24,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -526282557, now seen corresponding path program 1 times [2024-11-17 03:29:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689704336] [2024-11-17 03:29:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:24,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-17 03:29:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689704336] [2024-11-17 03:29:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689704336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474538285] [2024-11-17 03:29:24,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:24,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:24,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 152 [2024-11-17 03:29:24,365 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) [2024-11-17 03:29:24,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:24,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 152 [2024-11-17 03:29:24,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:24,610 INFO L124 PetriNetUnfolderBase]: 596/2150 cut-off events. [2024-11-17 03:29:24,610 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-17 03:29:24,614 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. [2024-11-17 03:29:24,622 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 77 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2024-11-17 03:29:24,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 147 transitions, 493 flow [2024-11-17 03:29:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-17 03:29:24,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6293859649122807 [2024-11-17 03:29:24,625 INFO L175 Difference]: Start difference. First operand has 132 places, 125 transitions, 291 flow. Second operand 3 states and 287 transitions. [2024-11-17 03:29:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 147 transitions, 493 flow [2024-11-17 03:29:24,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 147 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:29:24,631 INFO L231 Difference]: Finished difference. Result has 133 places, 125 transitions, 297 flow [2024-11-17 03:29:24,634 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} [2024-11-17 03:29:24,634 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 9 predicate places. [2024-11-17 03:29:24,634 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 125 transitions, 297 flow [2024-11-17 03:29:24,635 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) [2024-11-17 03:29:24,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:24,636 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:24,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:29:24,636 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)] === [2024-11-17 03:29:24,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1981225731, now seen corresponding path program 1 times [2024-11-17 03:29:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:24,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278095225] [2024-11-17 03:29:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278095225] [2024-11-17 03:29:24,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278095225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899083576] [2024-11-17 03:29:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:24,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:24,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:29:24,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:29:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:24,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:29:24,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:24,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899083576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:24,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-17 03:29:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860241651] [2024-11-17 03:29:24,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:24,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:29:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:29:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:29:24,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 152 [2024-11-17 03:29:24,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 125 transitions, 297 flow. Second operand has 12 states, 12 states have (on average 73.33333333333333) internal successors, (880), 12 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:24,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:24,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 152 [2024-11-17 03:29:24,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:25,210 INFO L124 PetriNetUnfolderBase]: 530/1945 cut-off events. [2024-11-17 03:29:25,211 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2024-11-17 03:29:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1945 events. 530/1945 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15221 event pairs, 483 based on Foata normal form. 6/1705 useless extension candidates. Maximal degree in co-relation 3067. Up to 1036 conditions per place. [2024-11-17 03:29:25,223 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 50 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2024-11-17 03:29:25,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 131 transitions, 455 flow [2024-11-17 03:29:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:29:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:29:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 931 transitions. [2024-11-17 03:29:25,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-17 03:29:25,226 INFO L175 Difference]: Start difference. First operand has 133 places, 125 transitions, 297 flow. Second operand 12 states and 931 transitions. [2024-11-17 03:29:25,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 131 transitions, 455 flow [2024-11-17 03:29:25,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 131 transitions, 451 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:29:25,231 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 377 flow [2024-11-17 03:29:25,231 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} [2024-11-17 03:29:25,232 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 24 predicate places. [2024-11-17 03:29:25,233 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 377 flow [2024-11-17 03:29:25,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.33333333333333) internal successors, (880), 12 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:25,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:25,234 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:25,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:29:25,438 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 [2024-11-17 03:29:25,439 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)] === [2024-11-17 03:29:25,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 684460153, now seen corresponding path program 2 times [2024-11-17 03:29:25,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:25,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717708229] [2024-11-17 03:29:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:29:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717708229] [2024-11-17 03:29:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717708229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:25,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247533690] [2024-11-17 03:29:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:29:25,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:25,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:29:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:29:25,704 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:29:25,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:29:25,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:29:25,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:25,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:29:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:29:25,826 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:29:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247533690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:29:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-17 03:29:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482441780] [2024-11-17 03:29:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:25,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:29:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:29:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:29:25,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 152 [2024-11-17 03:29:25,886 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) [2024-11-17 03:29:25,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:25,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 152 [2024-11-17 03:29:25,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:26,195 INFO L124 PetriNetUnfolderBase]: 550/1997 cut-off events. [2024-11-17 03:29:26,195 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2024-11-17 03:29:26,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3228 conditions, 1997 events. 550/1997 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15735 event pairs, 0 based on Foata normal form. 22/1806 useless extension candidates. Maximal degree in co-relation 3211. Up to 963 conditions per place. [2024-11-17 03:29:26,208 INFO L140 encePairwiseOnDemand]: 147/152 looper letters, 122 selfloop transitions, 4 changer transitions 0/194 dead transitions. [2024-11-17 03:29:26,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 194 transitions, 753 flow [2024-11-17 03:29:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:29:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:29:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 467 transitions. [2024-11-17 03:29:26,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144736842105263 [2024-11-17 03:29:26,211 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 377 flow. Second operand 5 states and 467 transitions. [2024-11-17 03:29:26,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 194 transitions, 753 flow [2024-11-17 03:29:26,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 194 transitions, 717 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-17 03:29:26,218 INFO L231 Difference]: Finished difference. Result has 147 places, 131 transitions, 352 flow [2024-11-17 03:29:26,218 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} [2024-11-17 03:29:26,219 INFO L277 CegarLoopForPetriNet]: 124 programPoint places, 23 predicate places. [2024-11-17 03:29:26,219 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 131 transitions, 352 flow [2024-11-17 03:29:26,219 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) [2024-11-17 03:29:26,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:26,219 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:26,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:29:26,420 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 [2024-11-17 03:29:26,421 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)] === [2024-11-17 03:29:26,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash -256571046, now seen corresponding path program 1 times [2024-11-17 03:29:26,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:26,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347624194] [2024-11-17 03:29:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:26,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:26,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:29:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:26,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:29:26,494 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:29:26,495 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-17 03:29:26,496 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-17 03:29:26,497 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-17 03:29:26,498 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-17 03:29:26,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-17 03:29:26,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-17 03:29:26,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-17 03:29:26,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:29:26,502 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-17 03:29:26,504 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:29:26,504 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:29:26,534 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:29:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 216 transitions, 448 flow [2024-11-17 03:29:26,567 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-11-17 03:29:26,567 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:29:26,572 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. [2024-11-17 03:29:26,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 216 transitions, 448 flow [2024-11-17 03:29:26,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 216 transitions, 448 flow [2024-11-17 03:29:26,581 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:29:26,582 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;@68193062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:29:26,582 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-17 03:29:26,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:29:26,583 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-17 03:29:26,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:29:26,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:26,584 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:29:26,584 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)] === [2024-11-17 03:29:26,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1507413077, now seen corresponding path program 1 times [2024-11-17 03:29:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462185418] [2024-11-17 03:29:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:26,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462185418] [2024-11-17 03:29:26,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462185418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:26,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:26,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721480739] [2024-11-17 03:29:26,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:26,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-17 03:29:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-17 03:29:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-17 03:29:26,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 216 [2024-11-17 03:29:26,612 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) [2024-11-17 03:29:26,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:26,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 216 [2024-11-17 03:29:26,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:30,671 INFO L124 PetriNetUnfolderBase]: 23919/54834 cut-off events. [2024-11-17 03:29:30,672 INFO L125 PetriNetUnfolderBase]: For 156/189 co-relation queries the response was YES. [2024-11-17 03:29:30,796 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. [2024-11-17 03:29:31,006 INFO L140 encePairwiseOnDemand]: 177/216 looper letters, 73 selfloop transitions, 0 changer transitions 0/174 dead transitions. [2024-11-17 03:29:31,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 510 flow [2024-11-17 03:29:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-17 03:29:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-17 03:29:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 314 transitions. [2024-11-17 03:29:31,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7268518518518519 [2024-11-17 03:29:31,012 INFO L175 Difference]: Start difference. First operand has 176 places, 216 transitions, 448 flow. Second operand 2 states and 314 transitions. [2024-11-17 03:29:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 510 flow [2024-11-17 03:29:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:29:31,016 INFO L231 Difference]: Finished difference. Result has 174 places, 174 transitions, 364 flow [2024-11-17 03:29:31,016 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} [2024-11-17 03:29:31,018 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, -2 predicate places. [2024-11-17 03:29:31,018 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 174 transitions, 364 flow [2024-11-17 03:29:31,018 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) [2024-11-17 03:29:31,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:31,019 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:31,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:29:31,019 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)] === [2024-11-17 03:29:31,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:31,020 INFO L85 PathProgramCache]: Analyzing trace with hash -476294334, now seen corresponding path program 1 times [2024-11-17 03:29:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:31,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757114845] [2024-11-17 03:29:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:31,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:31,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757114845] [2024-11-17 03:29:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757114845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:31,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367899449] [2024-11-17 03:29:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:31,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:31,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-17 03:29:31,154 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) [2024-11-17 03:29:31,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:31,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-17 03:29:31,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:34,943 INFO L124 PetriNetUnfolderBase]: 23919/54836 cut-off events. [2024-11-17 03:29:34,944 INFO L125 PetriNetUnfolderBase]: For 156/189 co-relation queries the response was YES. [2024-11-17 03:29:35,065 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. [2024-11-17 03:29:35,240 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 73 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2024-11-17 03:29:35,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 516 flow [2024-11-17 03:29:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2024-11-17 03:29:35,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2024-11-17 03:29:35,243 INFO L175 Difference]: Start difference. First operand has 174 places, 174 transitions, 364 flow. Second operand 3 states and 376 transitions. [2024-11-17 03:29:35,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 516 flow [2024-11-17 03:29:35,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 516 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:29:35,245 INFO L231 Difference]: Finished difference. Result has 177 places, 175 transitions, 376 flow [2024-11-17 03:29:35,246 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} [2024-11-17 03:29:35,247 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 1 predicate places. [2024-11-17 03:29:35,248 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 376 flow [2024-11-17 03:29:35,248 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) [2024-11-17 03:29:35,248 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:35,248 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:35,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:29:35,248 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)] === [2024-11-17 03:29:35,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash -932732968, now seen corresponding path program 1 times [2024-11-17 03:29:35,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:35,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967119206] [2024-11-17 03:29:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967119206] [2024-11-17 03:29:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967119206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635499027] [2024-11-17 03:29:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:35,285 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) [2024-11-17 03:29:35,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:29:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:35,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-17 03:29:35,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:35,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:29:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635499027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:35,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-17 03:29:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939147737] [2024-11-17 03:29:35,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:35,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:29:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:29:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:29:35,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-17 03:29:35,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:35,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:35,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-17 03:29:35,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:39,236 INFO L124 PetriNetUnfolderBase]: 23919/54842 cut-off events. [2024-11-17 03:29:39,236 INFO L125 PetriNetUnfolderBase]: For 161/194 co-relation queries the response was YES. [2024-11-17 03:29:39,391 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. [2024-11-17 03:29:39,572 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 73 selfloop transitions, 5 changer transitions 0/178 dead transitions. [2024-11-17 03:29:39,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 544 flow [2024-11-17 03:29:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:29:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:29:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2024-11-17 03:29:39,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-11-17 03:29:39,577 INFO L175 Difference]: Start difference. First operand has 177 places, 175 transitions, 376 flow. Second operand 6 states and 681 transitions. [2024-11-17 03:29:39,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 544 flow [2024-11-17 03:29:39,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 178 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:39,580 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 410 flow [2024-11-17 03:29:39,581 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} [2024-11-17 03:29:39,581 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 8 predicate places. [2024-11-17 03:29:39,581 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 410 flow [2024-11-17 03:29:39,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:39,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:39,582 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:39,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:29:39,784 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 [2024-11-17 03:29:39,785 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)] === [2024-11-17 03:29:39,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1625148262, now seen corresponding path program 2 times [2024-11-17 03:29:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:39,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039031584] [2024-11-17 03:29:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:39,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-17 03:29:39,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039031584] [2024-11-17 03:29:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039031584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909754919] [2024-11-17 03:29:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:39,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:39,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2024-11-17 03:29:39,869 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) [2024-11-17 03:29:39,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:39,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2024-11-17 03:29:39,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:44,034 INFO L124 PetriNetUnfolderBase]: 25883/58066 cut-off events. [2024-11-17 03:29:44,034 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-11-17 03:29:44,237 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 661081 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. [2024-11-17 03:29:44,447 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 119 selfloop transitions, 2 changer transitions 0/218 dead transitions. [2024-11-17 03:29:44,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 732 flow [2024-11-17 03:29:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2024-11-17 03:29:44,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6327160493827161 [2024-11-17 03:29:44,449 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 410 flow. Second operand 3 states and 410 transitions. [2024-11-17 03:29:44,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 732 flow [2024-11-17 03:29:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 218 transitions, 724 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:44,455 INFO L231 Difference]: Finished difference. Result has 183 places, 176 transitions, 402 flow [2024-11-17 03:29:44,456 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} [2024-11-17 03:29:44,456 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 7 predicate places. [2024-11-17 03:29:44,456 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 176 transitions, 402 flow [2024-11-17 03:29:44,457 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) [2024-11-17 03:29:44,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:44,457 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:44,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:29:44,457 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)] === [2024-11-17 03:29:44,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1625148261, now seen corresponding path program 1 times [2024-11-17 03:29:44,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020248854] [2024-11-17 03:29:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-17 03:29:44,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:44,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020248854] [2024-11-17 03:29:44,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020248854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392393659] [2024-11-17 03:29:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:44,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:44,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:44,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2024-11-17 03:29:44,590 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) [2024-11-17 03:29:44,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:44,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2024-11-17 03:29:44,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:49,206 INFO L124 PetriNetUnfolderBase]: 26266/61060 cut-off events. [2024-11-17 03:29:49,206 INFO L125 PetriNetUnfolderBase]: For 820/842 co-relation queries the response was YES. [2024-11-17 03:29:49,412 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 717244 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. [2024-11-17 03:29:49,595 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 101 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2024-11-17 03:29:49,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 654 flow [2024-11-17 03:29:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2024-11-17 03:29:49,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6095679012345679 [2024-11-17 03:29:49,597 INFO L175 Difference]: Start difference. First operand has 183 places, 176 transitions, 402 flow. Second operand 3 states and 395 transitions. [2024-11-17 03:29:49,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 654 flow [2024-11-17 03:29:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 199 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:29:49,627 INFO L231 Difference]: Finished difference. Result has 184 places, 177 transitions, 412 flow [2024-11-17 03:29:49,627 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} [2024-11-17 03:29:49,628 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 8 predicate places. [2024-11-17 03:29:49,628 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 177 transitions, 412 flow [2024-11-17 03:29:49,628 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) [2024-11-17 03:29:49,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:49,629 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:49,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:29:49,629 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)] === [2024-11-17 03:29:49,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2120227781, now seen corresponding path program 1 times [2024-11-17 03:29:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:49,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40906134] [2024-11-17 03:29:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:49,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40906134] [2024-11-17 03:29:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40906134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309329152] [2024-11-17 03:29:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:49,712 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) [2024-11-17 03:29:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:29:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:49,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:29:49,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:49,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-17 03:29:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309329152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:49,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:49,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-17 03:29:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110669250] [2024-11-17 03:29:49,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:49,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:29:49,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:29:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:29:49,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2024-11-17 03:29:49,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 177 transitions, 412 flow. Second operand has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:49,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:49,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2024-11-17 03:29:49,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:54,264 INFO L124 PetriNetUnfolderBase]: 23917/55583 cut-off events. [2024-11-17 03:29:54,264 INFO L125 PetriNetUnfolderBase]: For 857/883 co-relation queries the response was YES. [2024-11-17 03:29:54,495 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 642390 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. [2024-11-17 03:29:54,664 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 74 selfloop transitions, 11 changer transitions 0/183 dead transitions. [2024-11-17 03:29:54,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 183 transitions, 618 flow [2024-11-17 03:29:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:29:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:29:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1290 transitions. [2024-11-17 03:29:54,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-11-17 03:29:54,668 INFO L175 Difference]: Start difference. First operand has 184 places, 177 transitions, 412 flow. Second operand 12 states and 1290 transitions. [2024-11-17 03:29:54,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 183 transitions, 618 flow [2024-11-17 03:29:54,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 183 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:54,672 INFO L231 Difference]: Finished difference. Result has 200 places, 183 transitions, 494 flow [2024-11-17 03:29:54,672 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} [2024-11-17 03:29:54,676 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 24 predicate places. [2024-11-17 03:29:54,676 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 183 transitions, 494 flow [2024-11-17 03:29:54,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.33333333333333) internal successors, (1216), 12 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:29:54,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:54,677 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:54,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:29:54,877 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 [2024-11-17 03:29:54,878 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)] === [2024-11-17 03:29:54,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 481126839, now seen corresponding path program 2 times [2024-11-17 03:29:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173752259] [2024-11-17 03:29:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:29:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173752259] [2024-11-17 03:29:55,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173752259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638500016] [2024-11-17 03:29:55,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:29:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:55,238 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) [2024-11-17 03:29:55,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:29:55,328 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:29:55,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:29:55,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:29:55,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:55,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:29:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:29:55,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:29:55,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638500016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:55,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:29:55,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-17 03:29:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869046587] [2024-11-17 03:29:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:55,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:29:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:29:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:29:55,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 216 [2024-11-17 03:29:55,468 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) [2024-11-17 03:29:55,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:55,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 216 [2024-11-17 03:29:55,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:00,162 INFO L124 PetriNetUnfolderBase]: 25148/58519 cut-off events. [2024-11-17 03:30:00,162 INFO L125 PetriNetUnfolderBase]: For 1810/1810 co-relation queries the response was YES. [2024-11-17 03:30:00,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97531 conditions, 58519 events. 25148/58519 cut-off events. For 1810/1810 co-relation queries the response was YES. Maximal size of possible extension queue 1678. Compared 687484 event pairs, 1137 based on Foata normal form. 506/53159 useless extension candidates. Maximal degree in co-relation 97513. Up to 32468 conditions per place. [2024-11-17 03:30:00,645 INFO L140 encePairwiseOnDemand]: 211/216 looper letters, 187 selfloop transitions, 5 changer transitions 0/288 dead transitions. [2024-11-17 03:30:00,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 288 transitions, 1086 flow [2024-11-17 03:30:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:30:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:30:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2024-11-17 03:30:00,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6231481481481481 [2024-11-17 03:30:00,647 INFO L175 Difference]: Start difference. First operand has 200 places, 183 transitions, 494 flow. Second operand 5 states and 673 transitions. [2024-11-17 03:30:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 288 transitions, 1086 flow [2024-11-17 03:30:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 288 transitions, 1050 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-17 03:30:00,655 INFO L231 Difference]: Finished difference. Result has 199 places, 183 transitions, 472 flow [2024-11-17 03:30:00,656 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} [2024-11-17 03:30:00,656 INFO L277 CegarLoopForPetriNet]: 176 programPoint places, 23 predicate places. [2024-11-17 03:30:00,658 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 183 transitions, 472 flow [2024-11-17 03:30:00,659 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) [2024-11-17 03:30:00,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:00,659 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:00,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:30:00,859 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 [2024-11-17 03:30:00,860 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)] === [2024-11-17 03:30:00,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1072332465, now seen corresponding path program 1 times [2024-11-17 03:30:00,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:00,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996812651] [2024-11-17 03:30:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:30:01,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:01,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996812651] [2024-11-17 03:30:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996812651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:01,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:30:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669907415] [2024-11-17 03:30:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:01,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:30:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:30:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:30:01,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 216 [2024-11-17 03:30:01,157 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) [2024-11-17 03:30:01,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:01,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 216 [2024-11-17 03:30:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand