./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:09:28,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:09:28,771 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:09:28,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:09:28,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:09:28,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:09:28,811 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:09:28,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:09:28,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:09:28,817 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:09:28,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:09:28,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:09:28,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:09:28,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:09:28,819 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:09:28,819 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:09:28,819 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:09:28,820 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:09:28,820 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:09:28,820 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:09:28,821 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:09:28,822 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:09:28,823 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:09:28,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:09:28,823 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:09:28,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:09:28,824 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:09:28,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:09:28,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:09:28,824 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:09:28,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:09:28,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:09:28,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:09:28,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:09:28,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:09:28,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:09:28,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:09:28,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:09:28,828 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:09:28,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:09:28,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:09:28,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:09:28,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-11-10 18:09:29,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:09:29,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:09:29,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:09:29,149 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:09:29,149 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:09:29,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-10 18:09:30,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:09:31,052 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:09:31,053 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-10 18:09:31,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2418adf2e/446c8060e41a43e5967508ea34d18666/FLAGdcdd38b01 [2024-11-10 18:09:31,092 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2418adf2e/446c8060e41a43e5967508ea34d18666 [2024-11-10 18:09:31,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:09:31,097 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:09:31,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:09:31,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:09:31,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:09:31,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e74188f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31, skipping insertion in model container [2024-11-10 18:09:31,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,154 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:09:31,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:09:31,724 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:09:31,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:09:31,859 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:09:31,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31 WrapperNode [2024-11-10 18:09:31,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:09:31,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:09:31,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:09:31,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:09:31,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,938 INFO L138 Inliner]: procedures = 272, calls = 96, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 266 [2024-11-10 18:09:31,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:09:31,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:09:31,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:09:31,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:09:31,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:31,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,002 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 70, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 60, 0]. The 5 writes are split as follows [0, 0, 4, 1]. [2024-11-10 18:09:32,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,045 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:09:32,064 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:09:32,066 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:09:32,069 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:09:32,070 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (1/1) ... [2024-11-10 18:09:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:09:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:32,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:09:32,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:09:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:09:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:09:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:09:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:09:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:09:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:09:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:09:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:09:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:09:32,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:09:32,178 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:09:32,330 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:09:32,332 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:09:32,694 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L954: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:09:32,695 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L954-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:09:32,792 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:09:32,792 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:09:33,192 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:09:33,193 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:09:33,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:09:33 BoogieIcfgContainer [2024-11-10 18:09:33,195 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:09:33,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:09:33,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:09:33,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:09:33,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:09:31" (1/3) ... [2024-11-10 18:09:33,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249d3166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:09:33, skipping insertion in model container [2024-11-10 18:09:33,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:09:31" (2/3) ... [2024-11-10 18:09:33,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249d3166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:09:33, skipping insertion in model container [2024-11-10 18:09:33,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:09:33" (3/3) ... [2024-11-10 18:09:33,206 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-11-10 18:09:33,225 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:09:33,226 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-10 18:09:33,226 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:09:33,299 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:09:33,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 162 transitions, 331 flow [2024-11-10 18:09:33,447 INFO L124 PetriNetUnfolderBase]: 52/246 cut-off events. [2024-11-10 18:09:33,448 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:09:33,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 246 events. 52/246 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1143 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2024-11-10 18:09:33,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 162 transitions, 331 flow [2024-11-10 18:09:33,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 162 transitions, 331 flow [2024-11-10 18:09:33,529 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:09:33,545 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;@274308d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:09:33,548 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-10 18:09:33,564 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:09:33,568 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:09:33,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:09:33,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:33,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:09:33,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:33,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash -758375860, now seen corresponding path program 1 times [2024-11-10 18:09:33,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801310629] [2024-11-10 18:09:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:33,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:33,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801310629] [2024-11-10 18:09:33,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801310629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:33,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398421103] [2024-11-10 18:09:33,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:33,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:09:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:33,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:09:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:09:33,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 162 [2024-11-10 18:09:33,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 331 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:33,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:33,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 162 [2024-11-10 18:09:33,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:34,396 INFO L124 PetriNetUnfolderBase]: 602/2141 cut-off events. [2024-11-10 18:09:34,397 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:09:34,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3288 conditions, 2141 events. 602/2141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17193 event pairs, 504 based on Foata normal form. 620/2501 useless extension candidates. Maximal degree in co-relation 3172. Up to 1142 conditions per place. [2024-11-10 18:09:34,424 INFO L140 encePairwiseOnDemand]: 133/162 looper letters, 53 selfloop transitions, 0 changer transitions 0/131 dead transitions. [2024-11-10 18:09:34,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 131 transitions, 375 flow [2024-11-10 18:09:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 18:09:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 18:09:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2024-11-10 18:09:34,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7345679012345679 [2024-11-10 18:09:34,441 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 331 flow. Second operand 2 states and 238 transitions. [2024-11-10 18:09:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 131 transitions, 375 flow [2024-11-10 18:09:34,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 131 transitions, 375 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:34,449 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 269 flow [2024-11-10 18:09:34,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=269, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-11-10 18:09:34,454 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2024-11-10 18:09:34,455 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 269 flow [2024-11-10 18:09:34,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:34,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:34,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:34,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:09:34,456 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:34,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2016547679, now seen corresponding path program 1 times [2024-11-10 18:09:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468571017] [2024-11-10 18:09:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:34,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:34,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:34,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468571017] [2024-11-10 18:09:34,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468571017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:34,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:34,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809496971] [2024-11-10 18:09:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:34,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:34,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 162 [2024-11-10 18:09:34,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:34,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:34,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 162 [2024-11-10 18:09:34,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:35,006 INFO L124 PetriNetUnfolderBase]: 602/2143 cut-off events. [2024-11-10 18:09:35,007 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 18:09:35,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 2143 events. 602/2143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17199 event pairs, 504 based on Foata normal form. 0/1882 useless extension candidates. Maximal degree in co-relation 3289. Up to 1143 conditions per place. [2024-11-10 18:09:35,026 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 53 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2024-11-10 18:09:35,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 132 transitions, 381 flow [2024-11-10 18:09:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-10 18:09:35,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5905349794238683 [2024-11-10 18:09:35,032 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 269 flow. Second operand 3 states and 287 transitions. [2024-11-10 18:09:35,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 132 transitions, 381 flow [2024-11-10 18:09:35,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 132 transitions, 381 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:35,041 INFO L231 Difference]: Finished difference. Result has 132 places, 132 transitions, 281 flow [2024-11-10 18:09:35,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2024-11-10 18:09:35,043 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 2 predicate places. [2024-11-10 18:09:35,043 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 281 flow [2024-11-10 18:09:35,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:35,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:35,044 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:35,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:09:35,045 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:35,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -344767293, now seen corresponding path program 1 times [2024-11-10 18:09:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:35,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096862461] [2024-11-10 18:09:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:35,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096862461] [2024-11-10 18:09:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096862461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796910581] [2024-11-10 18:09:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:35,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:09:35,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:09:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:35,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 18:09:35,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:35,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:09:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796910581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:09:35,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:09:35,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-10 18:09:35,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972117202] [2024-11-10 18:09:35,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:09:35,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:09:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:09:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:09:35,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 162 [2024-11-10 18:09:35,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:35,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:35,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 162 [2024-11-10 18:09:35,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:35,763 INFO L124 PetriNetUnfolderBase]: 602/2149 cut-off events. [2024-11-10 18:09:35,764 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-10 18:09:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 2149 events. 602/2149 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17228 event pairs, 504 based on Foata normal form. 0/1888 useless extension candidates. Maximal degree in co-relation 3306. Up to 1143 conditions per place. [2024-11-10 18:09:35,778 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 53 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2024-11-10 18:09:35,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 135 transitions, 409 flow [2024-11-10 18:09:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:09:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:09:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 523 transitions. [2024-11-10 18:09:35,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5380658436213992 [2024-11-10 18:09:35,783 INFO L175 Difference]: Start difference. First operand has 132 places, 132 transitions, 281 flow. Second operand 6 states and 523 transitions. [2024-11-10 18:09:35,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 135 transitions, 409 flow [2024-11-10 18:09:35,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:09:35,789 INFO L231 Difference]: Finished difference. Result has 139 places, 135 transitions, 315 flow [2024-11-10 18:09:35,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=139, PETRI_TRANSITIONS=135} [2024-11-10 18:09:35,790 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 9 predicate places. [2024-11-10 18:09:35,790 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 135 transitions, 315 flow [2024-11-10 18:09:35,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:35,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:35,791 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:35,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:09:35,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:35,997 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:35,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1561512489, now seen corresponding path program 2 times [2024-11-10 18:09:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240457363] [2024-11-10 18:09:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:09:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240457363] [2024-11-10 18:09:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240457363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374880388] [2024-11-10 18:09:36,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:36,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:36,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 162 [2024-11-10 18:09:36,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 135 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:36,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:36,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 162 [2024-11-10 18:09:36,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:36,565 INFO L124 PetriNetUnfolderBase]: 646/2238 cut-off events. [2024-11-10 18:09:36,566 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-10 18:09:36,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 2238 events. 646/2238 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18184 event pairs, 504 based on Foata normal form. 0/1992 useless extension candidates. Maximal degree in co-relation 3495. Up to 1139 conditions per place. [2024-11-10 18:09:36,584 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 79 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2024-11-10 18:09:36,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 155 transitions, 517 flow [2024-11-10 18:09:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2024-11-10 18:09:36,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6193415637860082 [2024-11-10 18:09:36,588 INFO L175 Difference]: Start difference. First operand has 139 places, 135 transitions, 315 flow. Second operand 3 states and 301 transitions. [2024-11-10 18:09:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 155 transitions, 517 flow [2024-11-10 18:09:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 155 transitions, 509 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:09:36,593 INFO L231 Difference]: Finished difference. Result has 138 places, 133 transitions, 307 flow [2024-11-10 18:09:36,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=307, PETRI_PLACES=138, PETRI_TRANSITIONS=133} [2024-11-10 18:09:36,596 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 8 predicate places. [2024-11-10 18:09:36,596 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 133 transitions, 307 flow [2024-11-10 18:09:36,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:36,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:36,597 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:36,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:09:36,597 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:36,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1561512490, now seen corresponding path program 1 times [2024-11-10 18:09:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:36,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852698398] [2024-11-10 18:09:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:09:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852698398] [2024-11-10 18:09:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852698398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:36,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147420809] [2024-11-10 18:09:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:36,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:36,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:36,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:36,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 162 [2024-11-10 18:09:36,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 133 transitions, 307 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:36,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:36,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 162 [2024-11-10 18:09:36,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:37,196 INFO L124 PetriNetUnfolderBase]: 645/2194 cut-off events. [2024-11-10 18:09:37,197 INFO L125 PetriNetUnfolderBase]: For 47/48 co-relation queries the response was YES. [2024-11-10 18:09:37,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 2194 events. 645/2194 cut-off events. For 47/48 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 17408 event pairs, 500 based on Foata normal form. 1/1933 useless extension candidates. Maximal degree in co-relation 3447. Up to 1187 conditions per place. [2024-11-10 18:09:37,215 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 80 selfloop transitions, 2 changer transitions 0/156 dead transitions. [2024-11-10 18:09:37,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 156 transitions, 517 flow [2024-11-10 18:09:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2024-11-10 18:09:37,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6337448559670782 [2024-11-10 18:09:37,218 INFO L175 Difference]: Start difference. First operand has 138 places, 133 transitions, 307 flow. Second operand 3 states and 308 transitions. [2024-11-10 18:09:37,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 156 transitions, 517 flow [2024-11-10 18:09:37,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 156 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:09:37,226 INFO L231 Difference]: Finished difference. Result has 139 places, 133 transitions, 313 flow [2024-11-10 18:09:37,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=139, PETRI_TRANSITIONS=133} [2024-11-10 18:09:37,229 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 9 predicate places. [2024-11-10 18:09:37,230 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 133 transitions, 313 flow [2024-11-10 18:09:37,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:37,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:37,231 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:37,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:09:37,231 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:37,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 542992270, now seen corresponding path program 1 times [2024-11-10 18:09:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:37,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402298269] [2024-11-10 18:09:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:37,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:09:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402298269] [2024-11-10 18:09:37,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402298269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:37,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298845089] [2024-11-10 18:09:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:37,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:09:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:09:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:37,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:09:37,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:09:37,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:09:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:09:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298845089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:09:37,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:09:37,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 18:09:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731155164] [2024-11-10 18:09:37,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:09:37,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:09:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:09:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:09:37,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 162 [2024-11-10 18:09:37,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 133 transitions, 313 flow. Second operand has 13 states, 13 states have (on average 78.38461538461539) internal successors, (1019), 13 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:37,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:37,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 162 [2024-11-10 18:09:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:37,939 INFO L124 PetriNetUnfolderBase]: 599/2084 cut-off events. [2024-11-10 18:09:37,940 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2024-11-10 18:09:37,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 2084 events. 599/2084 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 16360 event pairs, 504 based on Foata normal form. 6/1850 useless extension candidates. Maximal degree in co-relation 3298. Up to 1122 conditions per place. [2024-11-10 18:09:37,958 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 53 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2024-11-10 18:09:37,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 477 flow [2024-11-10 18:09:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:09:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:09:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 994 transitions. [2024-11-10 18:09:37,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5113168724279835 [2024-11-10 18:09:37,963 INFO L175 Difference]: Start difference. First operand has 139 places, 133 transitions, 313 flow. Second operand 12 states and 994 transitions. [2024-11-10 18:09:37,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 477 flow [2024-11-10 18:09:37,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 139 transitions, 473 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:09:37,970 INFO L231 Difference]: Finished difference. Result has 154 places, 139 transitions, 393 flow [2024-11-10 18:09:37,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=393, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2024-11-10 18:09:37,972 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 24 predicate places. [2024-11-10 18:09:37,973 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 393 flow [2024-11-10 18:09:37,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.38461538461539) internal successors, (1019), 13 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:37,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:37,974 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:37,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:09:38,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 18:09:38,177 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:38,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1575737794, now seen corresponding path program 2 times [2024-11-10 18:09:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:38,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651680132] [2024-11-10 18:09:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:09:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651680132] [2024-11-10 18:09:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651680132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267076963] [2024-11-10 18:09:38,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:09:38,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:38,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:09:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:09:38,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:09:38,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:09:38,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:09:38,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:38,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:09:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:09:38,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:09:38,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267076963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:38,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:09:38,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-10 18:09:38,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687637102] [2024-11-10 18:09:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:38,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:09:38,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:09:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:09:38,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 162 [2024-11-10 18:09:38,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 393 flow. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:38,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:38,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 162 [2024-11-10 18:09:38,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:39,156 INFO L124 PetriNetUnfolderBase]: 598/2116 cut-off events. [2024-11-10 18:09:39,156 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-11-10 18:09:39,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3395 conditions, 2116 events. 598/2116 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17019 event pairs, 0 based on Foata normal form. 22/1925 useless extension candidates. Maximal degree in co-relation 3378. Up to 1007 conditions per place. [2024-11-10 18:09:39,179 INFO L140 encePairwiseOnDemand]: 157/162 looper letters, 127 selfloop transitions, 4 changer transitions 0/205 dead transitions. [2024-11-10 18:09:39,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 785 flow [2024-11-10 18:09:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:09:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:09:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 502 transitions. [2024-11-10 18:09:39,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6197530864197531 [2024-11-10 18:09:39,182 INFO L175 Difference]: Start difference. First operand has 154 places, 139 transitions, 393 flow. Second operand 5 states and 502 transitions. [2024-11-10 18:09:39,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 785 flow [2024-11-10 18:09:39,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 205 transitions, 749 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-10 18:09:39,189 INFO L231 Difference]: Finished difference. Result has 153 places, 139 transitions, 368 flow [2024-11-10 18:09:39,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2024-11-10 18:09:39,190 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 23 predicate places. [2024-11-10 18:09:39,190 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 368 flow [2024-11-10 18:09:39,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:39,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:39,191 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:39,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:09:39,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:39,393 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-10 18:09:39,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1603232054, now seen corresponding path program 1 times [2024-11-10 18:09:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787674256] [2024-11-10 18:09:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:39,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:09:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:39,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:09:39,496 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:09:39,497 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-10 18:09:39,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-10 18:09:39,499 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-10 18:09:39,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-10 18:09:39,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-10 18:09:39,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-10 18:09:39,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-10 18:09:39,500 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-10 18:09:39,501 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-10 18:09:39,502 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-10 18:09:39,502 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-10 18:09:39,502 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-10 18:09:39,502 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-10 18:09:39,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-10 18:09:39,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-10 18:09:39,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-10 18:09:39,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-10 18:09:39,503 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-10 18:09:39,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-10 18:09:39,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-10 18:09:39,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-10 18:09:39,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-10 18:09:39,504 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-10 18:09:39,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-10 18:09:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-10 18:09:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-10 18:09:39,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-10 18:09:39,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:09:39,507 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-10 18:09:39,510 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:09:39,510 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:09:39,551 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:09:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 231 transitions, 478 flow [2024-11-10 18:09:39,591 INFO L124 PetriNetUnfolderBase]: 87/414 cut-off events. [2024-11-10 18:09:39,592 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:09:39,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 414 events. 87/414 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2285 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 248. Up to 12 conditions per place. [2024-11-10 18:09:39,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 231 transitions, 478 flow [2024-11-10 18:09:39,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 231 transitions, 478 flow [2024-11-10 18:09:39,612 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:09:39,613 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;@274308d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:09:39,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-10 18:09:39,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:09:39,617 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:09:39,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:09:39,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:39,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:09:39,618 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:09:39,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1780435180, now seen corresponding path program 1 times [2024-11-10 18:09:39,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:39,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328631905] [2024-11-10 18:09:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:39,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:39,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328631905] [2024-11-10 18:09:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328631905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:39,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128825703] [2024-11-10 18:09:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:39,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:09:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:09:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:09:39,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 231 [2024-11-10 18:09:39,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 231 transitions, 478 flow. Second operand has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:39,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:39,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 231 [2024-11-10 18:09:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:45,536 INFO L124 PetriNetUnfolderBase]: 26565/60536 cut-off events. [2024-11-10 18:09:45,536 INFO L125 PetriNetUnfolderBase]: For 207/249 co-relation queries the response was YES. [2024-11-10 18:09:45,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99054 conditions, 60536 events. 26565/60536 cut-off events. For 207/249 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 703590 event pairs, 23264 based on Foata normal form. 20593/74820 useless extension candidates. Maximal degree in co-relation 82457. Up to 38401 conditions per place. [2024-11-10 18:09:46,068 INFO L140 encePairwiseOnDemand]: 189/231 looper letters, 77 selfloop transitions, 0 changer transitions 0/186 dead transitions. [2024-11-10 18:09:46,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 186 transitions, 542 flow [2024-11-10 18:09:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 18:09:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 18:09:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 337 transitions. [2024-11-10 18:09:46,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7294372294372294 [2024-11-10 18:09:46,072 INFO L175 Difference]: Start difference. First operand has 185 places, 231 transitions, 478 flow. Second operand 2 states and 337 transitions. [2024-11-10 18:09:46,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 186 transitions, 542 flow [2024-11-10 18:09:46,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 186 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:46,078 INFO L231 Difference]: Finished difference. Result has 183 places, 186 transitions, 388 flow [2024-11-10 18:09:46,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=388, PETRI_PLACES=183, PETRI_TRANSITIONS=186} [2024-11-10 18:09:46,080 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, -2 predicate places. [2024-11-10 18:09:46,080 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 186 transitions, 388 flow [2024-11-10 18:09:46,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:46,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:46,081 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:46,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:09:46,081 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:09:46,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash -622816536, now seen corresponding path program 1 times [2024-11-10 18:09:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:46,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847435194] [2024-11-10 18:09:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:46,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:46,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847435194] [2024-11-10 18:09:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847435194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:46,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:46,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422283627] [2024-11-10 18:09:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:46,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:46,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 231 [2024-11-10 18:09:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 186 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 231 [2024-11-10 18:09:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:51,553 INFO L124 PetriNetUnfolderBase]: 26565/60538 cut-off events. [2024-11-10 18:09:51,554 INFO L125 PetriNetUnfolderBase]: For 207/249 co-relation queries the response was YES. [2024-11-10 18:09:51,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99059 conditions, 60538 events. 26565/60538 cut-off events. For 207/249 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 703588 event pairs, 23264 based on Foata normal form. 0/54228 useless extension candidates. Maximal degree in co-relation 99054. Up to 38402 conditions per place. [2024-11-10 18:09:52,025 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 77 selfloop transitions, 2 changer transitions 0/187 dead transitions. [2024-11-10 18:09:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 187 transitions, 548 flow [2024-11-10 18:09:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2024-11-10 18:09:52,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5829725829725829 [2024-11-10 18:09:52,029 INFO L175 Difference]: Start difference. First operand has 183 places, 186 transitions, 388 flow. Second operand 3 states and 404 transitions. [2024-11-10 18:09:52,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 187 transitions, 548 flow [2024-11-10 18:09:52,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 187 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:52,037 INFO L231 Difference]: Finished difference. Result has 186 places, 187 transitions, 400 flow [2024-11-10 18:09:52,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=186, PETRI_TRANSITIONS=187} [2024-11-10 18:09:52,038 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 1 predicate places. [2024-11-10 18:09:52,038 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 400 flow [2024-11-10 18:09:52,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:52,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:52,039 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:52,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:09:52,039 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:09:52,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -998927830, now seen corresponding path program 1 times [2024-11-10 18:09:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:52,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543625998] [2024-11-10 18:09:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:52,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:52,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543625998] [2024-11-10 18:09:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543625998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922944137] [2024-11-10 18:09:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:52,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:52,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:09:52,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:09:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:52,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 18:09:52,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:52,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:09:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:52,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922944137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:09:52,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:09:52,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-10 18:09:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844951944] [2024-11-10 18:09:52,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:09:52,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:09:52,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:09:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:09:52,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 231 [2024-11-10 18:09:52,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 400 flow. Second operand has 7 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:52,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:52,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 231 [2024-11-10 18:09:52,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:57,437 INFO L124 PetriNetUnfolderBase]: 26565/60544 cut-off events. [2024-11-10 18:09:57,437 INFO L125 PetriNetUnfolderBase]: For 212/254 co-relation queries the response was YES. [2024-11-10 18:09:57,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99078 conditions, 60544 events. 26565/60544 cut-off events. For 212/254 co-relation queries the response was YES. Maximal size of possible extension queue 1696. Compared 703502 event pairs, 23264 based on Foata normal form. 0/54234 useless extension candidates. Maximal degree in co-relation 99071. Up to 38402 conditions per place. [2024-11-10 18:09:57,989 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 77 selfloop transitions, 5 changer transitions 0/190 dead transitions. [2024-11-10 18:09:57,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 190 transitions, 576 flow [2024-11-10 18:09:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:09:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:09:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 733 transitions. [2024-11-10 18:09:57,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5288600288600288 [2024-11-10 18:09:57,992 INFO L175 Difference]: Start difference. First operand has 186 places, 187 transitions, 400 flow. Second operand 6 states and 733 transitions. [2024-11-10 18:09:57,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 190 transitions, 576 flow [2024-11-10 18:09:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 190 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:09:57,998 INFO L231 Difference]: Finished difference. Result has 193 places, 190 transitions, 434 flow [2024-11-10 18:09:57,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=193, PETRI_TRANSITIONS=190} [2024-11-10 18:09:57,999 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 8 predicate places. [2024-11-10 18:09:58,000 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 190 transitions, 434 flow [2024-11-10 18:09:58,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:58,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:58,001 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:09:58,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:09:58,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:58,202 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:09:58,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 207379696, now seen corresponding path program 2 times [2024-11-10 18:09:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170485423] [2024-11-10 18:09:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:09:58,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:58,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170485423] [2024-11-10 18:09:58,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170485423] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:58,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:09:58,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459872317] [2024-11-10 18:09:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:58,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:58,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 231 [2024-11-10 18:09:58,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 190 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:58,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:58,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 231 [2024-11-10 18:09:58,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:03,689 INFO L124 PetriNetUnfolderBase]: 28606/64033 cut-off events. [2024-11-10 18:10:03,689 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-10 18:10:03,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105658 conditions, 64033 events. 28606/64033 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 1829. Compared 742618 event pairs, 23243 based on Foata normal form. 0/57688 useless extension candidates. Maximal degree in co-relation 105648. Up to 38354 conditions per place. [2024-11-10 18:10:04,275 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 125 selfloop transitions, 2 changer transitions 0/232 dead transitions. [2024-11-10 18:10:04,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 232 transitions, 772 flow [2024-11-10 18:10:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2024-11-10 18:10:04,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-10 18:10:04,279 INFO L175 Difference]: Start difference. First operand has 193 places, 190 transitions, 434 flow. Second operand 3 states and 440 transitions. [2024-11-10 18:10:04,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 232 transitions, 772 flow [2024-11-10 18:10:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 232 transitions, 764 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:04,286 INFO L231 Difference]: Finished difference. Result has 192 places, 188 transitions, 426 flow [2024-11-10 18:10:04,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=426, PETRI_PLACES=192, PETRI_TRANSITIONS=188} [2024-11-10 18:10:04,288 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 7 predicate places. [2024-11-10 18:10:04,288 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 188 transitions, 426 flow [2024-11-10 18:10:04,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:04,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:04,289 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:04,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:10:04,289 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:04,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 207379697, now seen corresponding path program 1 times [2024-11-10 18:10:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725868188] [2024-11-10 18:10:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 18:10:04,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725868188] [2024-11-10 18:10:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725868188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:04,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:04,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:04,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190916621] [2024-11-10 18:10:04,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:04,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:10:04,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:10:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:10:04,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 231 [2024-11-10 18:10:04,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 188 transitions, 426 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:04,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:04,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 231 [2024-11-10 18:10:04,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:09,794 INFO L124 PetriNetUnfolderBase]: 28633/65360 cut-off events. [2024-11-10 18:10:09,795 INFO L125 PetriNetUnfolderBase]: For 801/802 co-relation queries the response was YES. [2024-11-10 18:10:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107414 conditions, 65360 events. 28633/65360 cut-off events. For 801/802 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 764631 event pairs, 24513 based on Foata normal form. 1/58230 useless extension candidates. Maximal degree in co-relation 107403. Up to 41340 conditions per place. [2024-11-10 18:10:10,758 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 105 selfloop transitions, 2 changer transitions 0/212 dead transitions. [2024-11-10 18:10:10,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 212 transitions, 688 flow [2024-11-10 18:10:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:10:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:10:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2024-11-10 18:10:10,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2024-11-10 18:10:10,761 INFO L175 Difference]: Start difference. First operand has 192 places, 188 transitions, 426 flow. Second operand 3 states and 426 transitions. [2024-11-10 18:10:10,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 212 transitions, 688 flow [2024-11-10 18:10:10,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 212 transitions, 684 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:10:10,774 INFO L231 Difference]: Finished difference. Result has 193 places, 189 transitions, 436 flow [2024-11-10 18:10:10,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=436, PETRI_PLACES=193, PETRI_TRANSITIONS=189} [2024-11-10 18:10:10,775 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 8 predicate places. [2024-11-10 18:10:10,776 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 189 transitions, 436 flow [2024-11-10 18:10:10,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:10,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:10,776 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:10,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:10:10,777 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:10,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash 514283281, now seen corresponding path program 1 times [2024-11-10 18:10:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396770134] [2024-11-10 18:10:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396770134] [2024-11-10 18:10:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396770134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693048579] [2024-11-10 18:10:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:10,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:10,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:10,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:10:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:11,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:10:11,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:11,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:10:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:10:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693048579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:10:11,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:10:11,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 18:10:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882916598] [2024-11-10 18:10:11,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:10:11,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:10:11,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:11,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:10:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:10:11,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 231 [2024-11-10 18:10:11,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 189 transitions, 436 flow. Second operand has 13 states, 13 states have (on average 109.38461538461539) internal successors, (1422), 13 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:11,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:11,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 231 [2024-11-10 18:10:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:16,717 INFO L124 PetriNetUnfolderBase]: 26566/60809 cut-off events. [2024-11-10 18:10:16,717 INFO L125 PetriNetUnfolderBase]: For 843/848 co-relation queries the response was YES. [2024-11-10 18:10:17,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99918 conditions, 60809 events. 26566/60809 cut-off events. For 843/848 co-relation queries the response was YES. Maximal size of possible extension queue 1682. Compared 708148 event pairs, 23267 based on Foata normal form. 6/54479 useless extension candidates. Maximal degree in co-relation 99906. Up to 38367 conditions per place. [2024-11-10 18:10:17,547 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 78 selfloop transitions, 11 changer transitions 0/195 dead transitions. [2024-11-10 18:10:17,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 195 transitions, 650 flow [2024-11-10 18:10:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:10:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:10:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1390 transitions. [2024-11-10 18:10:17,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5014430014430015 [2024-11-10 18:10:17,552 INFO L175 Difference]: Start difference. First operand has 193 places, 189 transitions, 436 flow. Second operand 12 states and 1390 transitions. [2024-11-10 18:10:17,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 195 transitions, 650 flow [2024-11-10 18:10:17,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 195 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:10:17,556 INFO L231 Difference]: Finished difference. Result has 209 places, 195 transitions, 518 flow [2024-11-10 18:10:17,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=518, PETRI_PLACES=209, PETRI_TRANSITIONS=195} [2024-11-10 18:10:17,558 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 24 predicate places. [2024-11-10 18:10:17,558 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 195 transitions, 518 flow [2024-11-10 18:10:17,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 109.38461538461539) internal successors, (1422), 13 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:17,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:17,559 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:17,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:10:17,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 18:10:17,760 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:17,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 285183621, now seen corresponding path program 2 times [2024-11-10 18:10:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41198179] [2024-11-10 18:10:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41198179] [2024-11-10 18:10:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41198179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:10:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731848231] [2024-11-10 18:10:18,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:10:18,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:10:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:10:18,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:10:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:10:18,146 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:10:18,146 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:10:18,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:10:18,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:10:18,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:10:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-10 18:10:18,237 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:10:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731848231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:18,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:10:18,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-10 18:10:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675558513] [2024-11-10 18:10:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:18,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:10:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:10:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-10 18:10:18,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 231 [2024-11-10 18:10:18,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 195 transitions, 518 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:18,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:18,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 231 [2024-11-10 18:10:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:10:23,623 INFO L124 PetriNetUnfolderBase]: 26780/61992 cut-off events. [2024-11-10 18:10:23,624 INFO L125 PetriNetUnfolderBase]: For 1810/1810 co-relation queries the response was YES. [2024-11-10 18:10:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102632 conditions, 61992 events. 26780/61992 cut-off events. For 1810/1810 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 735654 event pairs, 1362 based on Foata normal form. 506/56592 useless extension candidates. Maximal degree in co-relation 102614. Up to 33920 conditions per place. [2024-11-10 18:10:24,282 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 195 selfloop transitions, 5 changer transitions 0/305 dead transitions. [2024-11-10 18:10:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 305 transitions, 1136 flow [2024-11-10 18:10:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:10:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:10:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2024-11-10 18:10:24,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-10 18:10:24,285 INFO L175 Difference]: Start difference. First operand has 209 places, 195 transitions, 518 flow. Second operand 5 states and 726 transitions. [2024-11-10 18:10:24,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 305 transitions, 1136 flow [2024-11-10 18:10:24,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 305 transitions, 1100 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-10 18:10:24,297 INFO L231 Difference]: Finished difference. Result has 208 places, 195 transitions, 496 flow [2024-11-10 18:10:24,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=208, PETRI_TRANSITIONS=195} [2024-11-10 18:10:24,298 INFO L277 CegarLoopForPetriNet]: 185 programPoint places, 23 predicate places. [2024-11-10 18:10:24,298 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 195 transitions, 496 flow [2024-11-10 18:10:24,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:24,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:24,298 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 18:10:24,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 18:10:24,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:10:24,499 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-10 18:10:24,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 483203620, now seen corresponding path program 1 times [2024-11-10 18:10:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:24,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689209598] [2024-11-10 18:10:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:24,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:10:24,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:10:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:10:24,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:10:24,566 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:10:24,566 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-10 18:10:24,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-11-10 18:10:24,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-10 18:10:24,568 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-10 18:10:24,569 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-10 18:10:24,570 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-10 18:10:24,571 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-10 18:10:24,572 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-10 18:10:24,573 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-10 18:10:24,574 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-10 18:10:24,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 18:10:24,574 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-10 18:10:24,575 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:10:24,575 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 18:10:24,623 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:10:24,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 300 transitions, 627 flow [2024-11-10 18:10:24,690 INFO L124 PetriNetUnfolderBase]: 127/609 cut-off events. [2024-11-10 18:10:24,691 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:10:24,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 609 events. 127/609 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3639 event pairs, 1 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 422. Up to 16 conditions per place. [2024-11-10 18:10:24,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 300 transitions, 627 flow [2024-11-10 18:10:24,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 300 transitions, 627 flow [2024-11-10 18:10:24,712 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:10:24,712 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;@274308d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:10:24,713 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-10 18:10:24,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:10:24,715 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-10 18:10:24,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:10:24,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:10:24,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 18:10:24,716 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-10 18:10:24,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:10:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2065537388, now seen corresponding path program 1 times [2024-11-10 18:10:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:10:24,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145667293] [2024-11-10 18:10:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:10:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:10:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:10:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:10:24,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:10:24,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145667293] [2024-11-10 18:10:24,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145667293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:10:24,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:10:24,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:10:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893981745] [2024-11-10 18:10:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:10:24,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 18:10:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:10:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 18:10:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 18:10:24,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 300 [2024-11-10 18:10:24,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 300 transitions, 627 flow. Second operand has 2 states, 2 states have (on average 142.0) internal successors, (284), 2 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:10:24,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:10:24,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 300 [2024-11-10 18:10:24,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand