./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/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 ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_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.graphml --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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:19:42,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:19:42,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:19:42,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:19:42,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:19:42,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:19:42,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:19:42,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:19:42,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:19:42,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:19:42,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:19:42,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:19:42,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:19:42,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:19:42,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:19:42,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:19:42,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:19:42,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:19:42,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:19:42,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:19:42,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:19:42,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:19:42,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:19:42,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:19:42,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:19:42,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:19:42,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:19:42,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:19:42,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:19:42,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:19:42,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:19:42,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:19:42,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:19:42,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:19:42,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:19:42,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:19:42,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:19:42,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:19:42,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:19:42,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:19:42,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:19:42,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:19:42,244 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:19:42,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:19:42,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:19:42,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:19:42,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:19:42,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:19:42,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:19:42,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:19:42,247 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:19:42,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:19:42,248 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:19:42,248 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:19:42,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:19:42,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:19:42,249 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:19:42,250 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:19:42,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:19:42,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:19:42,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:19:42,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:19:42,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:19:42,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:19:42,251 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:19:42,251 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:19:42,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:19:42,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:19:42,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:19:42,541 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:19:42,541 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:19:42,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-30 04:19:43,644 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:19:43,967 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:19:43,977 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-30 04:19:43,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660448c09/1a4ccba9ae044c2cba5e77845ded8006/FLAGb5dc438d9 [2023-08-30 04:19:43,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660448c09/1a4ccba9ae044c2cba5e77845ded8006 [2023-08-30 04:19:44,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:19:44,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:19:44,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:19:44,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:19:44,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:19:44,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d806d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44, skipping insertion in model container [2023-08-30 04:19:44,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:19:44,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:19:44,359 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-08-30 04:19:44,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:19:44,420 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:19:44,441 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-08-30 04:19:44,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:19:44,497 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:19:44,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44 WrapperNode [2023-08-30 04:19:44,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:19:44,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:19:44,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:19:44,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:19:44,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,577 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-30 04:19:44,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:19:44,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:19:44,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:19:44,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:19:44,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,611 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:19:44,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:19:44,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:19:44,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:19:44,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (1/1) ... [2023-08-30 04:19:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:19:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:19:44,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:19:44,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:19:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:19:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 04:19:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 04:19:44,738 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 04:19:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:19:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:19:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 04:19:44,738 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 04:19:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:19:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 04:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:19:44,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:19:44,741 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:19:44,935 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:19:44,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:19:45,256 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:19:45,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:19:45,263 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-30 04:19:45,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:19:45 BoogieIcfgContainer [2023-08-30 04:19:45,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:19:45,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:19:45,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:19:45,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:19:45,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:19:44" (1/3) ... [2023-08-30 04:19:45,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9f9103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:19:45, skipping insertion in model container [2023-08-30 04:19:45,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:19:44" (2/3) ... [2023-08-30 04:19:45,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9f9103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:19:45, skipping insertion in model container [2023-08-30 04:19:45,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:19:45" (3/3) ... [2023-08-30 04:19:45,271 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-30 04:19:45,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:19:45,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-30 04:19:45,283 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:19:45,378 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:19:45,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,520 INFO L130 PetriNetUnfolder]: 52/485 cut-off events. [2023-08-30 04:19:45,521 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 04:19:45,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 52/485 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2225 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2023-08-30 04:19:45,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,538 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:19:45,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 522 flow [2023-08-30 04:19:45,596 INFO L130 PetriNetUnfolder]: 52/485 cut-off events. [2023-08-30 04:19:45,596 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 04:19:45,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 52/485 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2225 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2023-08-30 04:19:45,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 20814 [2023-08-30 04:19:51,340 INFO L134 LiptonReduction]: Checked pairs total: 63255 [2023-08-30 04:19:51,343 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-30 04:19:51,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:19:51,374 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@28e81e36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:19:51,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-08-30 04:19:51,376 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 04:19:51,376 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:19:51,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:51,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 04:19:51,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:51,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash 975, now seen corresponding path program 1 times [2023-08-30 04:19:51,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:51,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944324993] [2023-08-30 04:19:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:51,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:51,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944324993] [2023-08-30 04:19:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944324993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:51,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:51,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 04:19:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563666537] [2023-08-30 04:19:51,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:51,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 04:19:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 04:19:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 04:19:51,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 464 [2023-08-30 04:19:51,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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) [2023-08-30 04:19:51,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:51,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 464 [2023-08-30 04:19:51,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:52,707 INFO L130 PetriNetUnfolder]: 9080/16126 cut-off events. [2023-08-30 04:19:52,708 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 04:19:52,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30362 conditions, 16126 events. 9080/16126 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 127227 event pairs, 8656 based on Foata normal form. 809/9391 useless extension candidates. Maximal degree in co-relation 27808. Up to 14126 conditions per place. [2023-08-30 04:19:52,815 INFO L137 encePairwiseOnDemand]: 449/464 looper letters, 67 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2023-08-30 04:19:52,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 334 flow [2023-08-30 04:19:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 04:19:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 04:19:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 536 transitions. [2023-08-30 04:19:52,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2023-08-30 04:19:52,827 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 536 transitions. [2023-08-30 04:19:52,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 536 transitions. [2023-08-30 04:19:52,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:52,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 536 transitions. [2023-08-30 04:19:52,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.0) internal successors, (536), 2 states have internal predecessors, (536), 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) [2023-08-30 04:19:52,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 464.0) internal successors, (1392), 3 states have internal predecessors, (1392), 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) [2023-08-30 04:19:52,836 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 464.0) internal successors, (1392), 3 states have internal predecessors, (1392), 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) [2023-08-30 04:19:52,837 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 230 flow. Second operand 2 states and 536 transitions. [2023-08-30 04:19:52,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 334 flow [2023-08-30 04:19:52,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:19:52,845 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 200 flow [2023-08-30 04:19:52,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-30 04:19:52,848 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2023-08-30 04:19:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 200 flow [2023-08-30 04:19:52,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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) [2023-08-30 04:19:52,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:52,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:52,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:19:52,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:52,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:52,850 INFO L85 PathProgramCache]: Analyzing trace with hash 31141, now seen corresponding path program 1 times [2023-08-30 04:19:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331012201] [2023-08-30 04:19:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:52,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:52,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331012201] [2023-08-30 04:19:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331012201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:52,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:52,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786986984] [2023-08-30 04:19:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:53,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 464 [2023-08-30 04:19:53,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2023-08-30 04:19:53,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:53,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 464 [2023-08-30 04:19:53,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:54,351 INFO L130 PetriNetUnfolder]: 9022/15572 cut-off events. [2023-08-30 04:19:54,352 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-30 04:19:54,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29791 conditions, 15572 events. 9022/15572 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 119914 event pairs, 6048 based on Foata normal form. 0/8577 useless extension candidates. Maximal degree in co-relation 29786. Up to 9957 conditions per place. [2023-08-30 04:19:54,437 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 101 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-30 04:19:54,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 476 flow [2023-08-30 04:19:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-08-30 04:19:54,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452586206896551 [2023-08-30 04:19:54,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-08-30 04:19:54,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-08-30 04:19:54,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:54,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-08-30 04:19:54,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 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) [2023-08-30 04:19:54,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:54,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:54,449 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 200 flow. Second operand 3 states and 759 transitions. [2023-08-30 04:19:54,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 476 flow [2023-08-30 04:19:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:19:54,453 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 200 flow [2023-08-30 04:19:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-08-30 04:19:54,454 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2023-08-30 04:19:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 200 flow [2023-08-30 04:19:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2023-08-30 04:19:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:54,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:19:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:19:54,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:54,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 31139, now seen corresponding path program 1 times [2023-08-30 04:19:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82705119] [2023-08-30 04:19:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:54,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82705119] [2023-08-30 04:19:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82705119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:54,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:54,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:19:54,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386380780] [2023-08-30 04:19:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:54,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:54,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 464 [2023-08-30 04:19:54,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-08-30 04:19:54,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:54,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 464 [2023-08-30 04:19:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:55,632 INFO L130 PetriNetUnfolder]: 8380/14131 cut-off events. [2023-08-30 04:19:55,632 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-08-30 04:19:55,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 14131 events. 8380/14131 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 101302 event pairs, 8008 based on Foata normal form. 0/8229 useless extension candidates. Maximal degree in co-relation 27517. Up to 12978 conditions per place. [2023-08-30 04:19:55,710 INFO L137 encePairwiseOnDemand]: 459/464 looper letters, 65 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-30 04:19:55,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 342 flow [2023-08-30 04:19:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-30 04:19:55,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244252873563219 [2023-08-30 04:19:55,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-30 04:19:55,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-30 04:19:55,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:55,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-30 04:19:55,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 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) [2023-08-30 04:19:55,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:55,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:55,717 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 200 flow. Second operand 3 states and 730 transitions. [2023-08-30 04:19:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 342 flow [2023-08-30 04:19:55,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:19:55,722 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 217 flow [2023-08-30 04:19:55,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-08-30 04:19:55,723 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2023-08-30 04:19:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 217 flow [2023-08-30 04:19:55,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-08-30 04:19:55,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:55,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:19:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:19:55,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:55,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:55,725 INFO L85 PathProgramCache]: Analyzing trace with hash 928419387, now seen corresponding path program 1 times [2023-08-30 04:19:55,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:55,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760654103] [2023-08-30 04:19:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:55,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760654103] [2023-08-30 04:19:55,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760654103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:19:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893745674] [2023-08-30 04:19:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:19:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:19:55,833 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) [2023-08-30 04:19:55,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:19:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:19:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:19:56,008 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:19:56,010 INFO L350 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-30 04:19:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:56,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:19:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893745674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:19:56,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:19:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:19:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877258462] [2023-08-30 04:19:56,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:19:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:19:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:19:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:19:56,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 464 [2023-08-30 04:19:56,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 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) [2023-08-30 04:19:56,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:56,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 464 [2023-08-30 04:19:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:57,374 INFO L130 PetriNetUnfolder]: 7437/12482 cut-off events. [2023-08-30 04:19:57,375 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-30 04:19:57,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24179 conditions, 12482 events. 7437/12482 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 88390 event pairs, 4204 based on Foata normal form. 1/6965 useless extension candidates. Maximal degree in co-relation 24172. Up to 11519 conditions per place. [2023-08-30 04:19:57,416 INFO L137 encePairwiseOnDemand]: 459/464 looper letters, 76 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2023-08-30 04:19:57,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 104 transitions, 409 flow [2023-08-30 04:19:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:19:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:19:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1381 transitions. [2023-08-30 04:19:57,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49604885057471265 [2023-08-30 04:19:57,419 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1381 transitions. [2023-08-30 04:19:57,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1381 transitions. [2023-08-30 04:19:57,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:57,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1381 transitions. [2023-08-30 04:19:57,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.16666666666666) internal successors, (1381), 6 states have internal predecessors, (1381), 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) [2023-08-30 04:19:57,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 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) [2023-08-30 04:19:57,427 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 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) [2023-08-30 04:19:57,427 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 217 flow. Second operand 6 states and 1381 transitions. [2023-08-30 04:19:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 104 transitions, 409 flow [2023-08-30 04:19:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:19:57,430 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 222 flow [2023-08-30 04:19:57,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-30 04:19:57,431 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-08-30 04:19:57,431 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 222 flow [2023-08-30 04:19:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 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) [2023-08-30 04:19:57,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:57,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:19:57,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:19:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:19:57,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:57,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 928419608, now seen corresponding path program 1 times [2023-08-30 04:19:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994484954] [2023-08-30 04:19:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:57,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994484954] [2023-08-30 04:19:57,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994484954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:57,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:57,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:19:57,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870602960] [2023-08-30 04:19:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:57,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:57,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 464 [2023-08-30 04:19:57,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-08-30 04:19:57,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:57,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 464 [2023-08-30 04:19:57,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:19:58,983 INFO L130 PetriNetUnfolder]: 11404/18931 cut-off events. [2023-08-30 04:19:58,984 INFO L131 PetriNetUnfolder]: For 247/247 co-relation queries the response was YES. [2023-08-30 04:19:59,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 18931 events. 11404/18931 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 140045 event pairs, 7272 based on Foata normal form. 0/10929 useless extension candidates. Maximal degree in co-relation 36881. Up to 12873 conditions per place. [2023-08-30 04:19:59,047 INFO L137 encePairwiseOnDemand]: 457/464 looper letters, 106 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-08-30 04:19:59,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 530 flow [2023-08-30 04:19:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:19:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:19:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-30 04:19:59,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531609195402298 [2023-08-30 04:19:59,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-30 04:19:59,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-30 04:19:59,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:19:59,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-30 04:19:59,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 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) [2023-08-30 04:19:59,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:59,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:19:59,054 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 222 flow. Second operand 3 states and 770 transitions. [2023-08-30 04:19:59,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 530 flow [2023-08-30 04:19:59,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 516 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 04:19:59,057 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 248 flow [2023-08-30 04:19:59,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-08-30 04:19:59,057 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-08-30 04:19:59,058 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 248 flow [2023-08-30 04:19:59,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-08-30 04:19:59,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:19:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:19:59,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:19:59,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:19:59,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:19:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 928419609, now seen corresponding path program 1 times [2023-08-30 04:19:59,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:19:59,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149377402] [2023-08-30 04:19:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:19:59,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:19:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:19:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:19:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:19:59,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149377402] [2023-08-30 04:19:59,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149377402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:19:59,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:19:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:19:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064201502] [2023-08-30 04:19:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:19:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:19:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:19:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:19:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:19:59,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 464 [2023-08-30 04:19:59,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2023-08-30 04:19:59,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:19:59,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 464 [2023-08-30 04:19:59,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:20:00,323 INFO L130 PetriNetUnfolder]: 11865/19836 cut-off events. [2023-08-30 04:20:00,323 INFO L131 PetriNetUnfolder]: For 2173/3030 co-relation queries the response was YES. [2023-08-30 04:20:00,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39861 conditions, 19836 events. 11865/19836 cut-off events. For 2173/3030 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 151728 event pairs, 7564 based on Foata normal form. 123/11991 useless extension candidates. Maximal degree in co-relation 39854. Up to 18237 conditions per place. [2023-08-30 04:20:00,422 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 74 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-08-30 04:20:00,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 420 flow [2023-08-30 04:20:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:20:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:20:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-08-30 04:20:00,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316091954022989 [2023-08-30 04:20:00,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-08-30 04:20:00,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-08-30 04:20:00,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:20:00,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-08-30 04:20:00,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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) [2023-08-30 04:20:00,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:20:00,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 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) [2023-08-30 04:20:00,430 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 248 flow. Second operand 3 states and 740 transitions. [2023-08-30 04:20:00,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 420 flow [2023-08-30 04:20:00,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:20:00,436 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 249 flow [2023-08-30 04:20:00,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-08-30 04:20:00,437 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-08-30 04:20:00,437 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 249 flow [2023-08-30 04:20:00,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2023-08-30 04:20:00,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:20:00,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:20:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:20:00,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-08-30 04:20:00,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:20:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1283769318, now seen corresponding path program 1 times [2023-08-30 04:20:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:20:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782732437] [2023-08-30 04:20:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:20:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:20:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:20:00,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:20:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:20:00,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:20:00,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:20:00,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2023-08-30 04:20:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2023-08-30 04:20:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2023-08-30 04:20:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2023-08-30 04:20:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2023-08-30 04:20:00,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2023-08-30 04:20:00,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2023-08-30 04:20:00,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2023-08-30 04:20:00,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2023-08-30 04:20:00,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2023-08-30 04:20:00,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2023-08-30 04:20:00,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2023-08-30 04:20:00,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2023-08-30 04:20:00,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2023-08-30 04:20:00,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2023-08-30 04:20:00,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2023-08-30 04:20:00,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:20:00,482 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:20:00,484 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:20:00,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:20:00,532 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 04:20:00,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,712 INFO L130 PetriNetUnfolder]: 191/1440 cut-off events. [2023-08-30 04:20:00,712 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-30 04:20:00,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 1440 events. 191/1440 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9813 event pairs, 2 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 898. Up to 32 conditions per place. [2023-08-30 04:20:00,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:20:00,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 391 transitions, 830 flow [2023-08-30 04:20:00,934 INFO L130 PetriNetUnfolder]: 191/1440 cut-off events. [2023-08-30 04:20:00,935 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-30 04:20:00,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 1440 events. 191/1440 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9813 event pairs, 2 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 898. Up to 32 conditions per place. [2023-08-30 04:20:01,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 80640 [2023-08-30 04:20:09,204 INFO L134 LiptonReduction]: Checked pairs total: 234246 [2023-08-30 04:20:09,204 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-30 04:20:09,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:20:09,206 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@28e81e36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:20:09,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2023-08-30 04:20:09,207 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 04:20:09,207 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:20:09,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:20:09,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 04:20:09,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-08-30 04:20:09,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:20:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1823, now seen corresponding path program 1 times [2023-08-30 04:20:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:20:09,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456997632] [2023-08-30 04:20:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:20:09,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:20:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:20:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:20:09,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:20:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456997632] [2023-08-30 04:20:09,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456997632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:20:09,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:20:09,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 04:20:09,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593075614] [2023-08-30 04:20:09,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:20:09,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 04:20:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:20:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 04:20:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 04:20:09,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 710 [2023-08-30 04:20:09,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 402 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 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) [2023-08-30 04:20:09,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:20:09,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 710 [2023-08-30 04:20:09,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand