./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_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_60-invariant_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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --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 04:13:45,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:13:45,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:13:45,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:13:45,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:13:45,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:13:45,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:13:45,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:13:45,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:13:45,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:13:45,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:13:45,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:13:45,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:13:45,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:13:45,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:13:45,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:13:45,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:13:45,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:13:45,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:13:45,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:13:45,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:13:45,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:13:45,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:13:45,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:13:45,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:13:45,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:13:45,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:13:45,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:13:45,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:13:45,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:13:45,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:13:45,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:13:45,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:13:45,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:13:45,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:13:45,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:13:45,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:13:45,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:13:45,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:13:45,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:13:45,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:13:45,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:13:45,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:13:45,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:13:45,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:13:45,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:13:45,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:13:45,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:13:45,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:13:45,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:13:45,736 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:13:45,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:13:45,737 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:13:45,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:13:45,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:13:45,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:13:45,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:13:45,739 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:13:45,739 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:13:45,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:13:45,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:13:45,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:13:45,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:13:45,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:13:45,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:13:45,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:13:45,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:13:45,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:13:45,741 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:13:45,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:13:45,741 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:13:45,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:13:46,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:13:46,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:13:46,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:13:46,084 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:13:46,085 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:13:46,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-30 04:13:47,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:13:47,436 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:13:47,436 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-30 04:13:47,451 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273d6358a/4b929c271daf4c40a4756cb3dd788f21/FLAGc5034df38 [2023-08-30 04:13:47,476 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/273d6358a/4b929c271daf4c40a4756cb3dd788f21 [2023-08-30 04:13:47,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:13:47,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:13:47,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:13:47,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:13:47,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:13:47,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:13:47" (1/1) ... [2023-08-30 04:13:47,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2c960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:47, skipping insertion in model container [2023-08-30 04:13:47,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:13:47" (1/1) ... [2023-08-30 04:13:47,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:13:47,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:13:47,869 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_60-invariant_racefree.i[30176,30189] [2023-08-30 04:13:47,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:13:47,955 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:13:47,991 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_60-invariant_racefree.i[30176,30189] [2023-08-30 04:13:48,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:13:48,050 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:13:48,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48 WrapperNode [2023-08-30 04:13:48,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:13:48,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:13:48,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:13:48,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:13:48,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,115 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-08-30 04:13:48,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:13:48,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:13:48,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:13:48,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:13:48,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,150 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:13:48,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:13:48,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:13:48,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:13:48,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (1/1) ... [2023-08-30 04:13:48,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:13:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:13:48,202 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 04:13:48,214 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 04:13:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:13:48,239 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:13:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:13:48,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:13:48,241 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 04:13:48,415 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:13:48,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:13:48,717 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:13:48,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:13:48,723 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-30 04:13:48,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:13:48 BoogieIcfgContainer [2023-08-30 04:13:48,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:13:48,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:13:48,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:13:48,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:13:48,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:13:47" (1/3) ... [2023-08-30 04:13:48,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795a02e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:13:48, skipping insertion in model container [2023-08-30 04:13:48,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:13:48" (2/3) ... [2023-08-30 04:13:48,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795a02e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:13:48, skipping insertion in model container [2023-08-30 04:13:48,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:13:48" (3/3) ... [2023-08-30 04:13:48,732 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-30 04:13:48,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:13:48,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-30 04:13:48,746 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:13:48,831 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:13:48,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:48,949 INFO L130 PetriNetUnfolder]: 33/208 cut-off events. [2023-08-30 04:13:48,949 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:13:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 208 events. 33/208 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-08-30 04:13:48,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:48,965 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:48,968 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:13:48,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:48,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 146 transitions, 300 flow [2023-08-30 04:13:49,013 INFO L130 PetriNetUnfolder]: 33/208 cut-off events. [2023-08-30 04:13:49,014 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:13:49,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 208 events. 33/208 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-08-30 04:13:49,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 6120 [2023-08-30 04:13:51,626 INFO L134 LiptonReduction]: Checked pairs total: 16576 [2023-08-30 04:13:51,627 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 04:13:51,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:13:51,644 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;@236c3a1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:13:51,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 04:13:51,646 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:13:51,646 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:13:51,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:51,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:13:51,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:13:51,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash 18185, now seen corresponding path program 1 times [2023-08-30 04:13:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:51,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076210762] [2023-08-30 04:13:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:51,951 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 04:13:51,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:51,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076210762] [2023-08-30 04:13:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076210762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:51,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565109965] [2023-08-30 04:13:51,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:51,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 258 [2023-08-30 04:13:52,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 69 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 04:13:52,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:52,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 258 [2023-08-30 04:13:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:52,240 INFO L130 PetriNetUnfolder]: 301/718 cut-off events. [2023-08-30 04:13:52,241 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:13:52,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 718 events. 301/718 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3634 event pairs, 114 based on Foata normal form. 98/627 useless extension candidates. Maximal degree in co-relation 1312. Up to 608 conditions per place. [2023-08-30 04:13:52,251 INFO L137 encePairwiseOnDemand]: 236/258 looper letters, 54 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 04:13:52,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 254 flow [2023-08-30 04:13:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-30 04:13:52,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633074935400517 [2023-08-30 04:13:52,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-30 04:13:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-30 04:13:52,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:52,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-30 04:13:52,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 04:13:52,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 04:13:52,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 04:13:52,289 INFO L175 Difference]: Start difference. First operand has 52 places, 69 transitions, 146 flow. Second operand 3 states and 436 transitions. [2023-08-30 04:13:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 254 flow [2023-08-30 04:13:52,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:13:52,295 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 118 flow [2023-08-30 04:13:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-30 04:13:52,300 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 04:13:52,301 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 118 flow [2023-08-30 04:13:52,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 04:13:52,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:52,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:13:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:13:52,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:13:52,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 18187, now seen corresponding path program 1 times [2023-08-30 04:13:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:52,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496599481] [2023-08-30 04:13:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:52,405 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 04:13:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496599481] [2023-08-30 04:13:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496599481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:52,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:52,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681318739] [2023-08-30 04:13:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:52,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:52,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:52,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2023-08-30 04:13:52,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 04:13:52,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:52,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2023-08-30 04:13:52,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:52,549 INFO L130 PetriNetUnfolder]: 271/640 cut-off events. [2023-08-30 04:13:52,550 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-30 04:13:52,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 640 events. 271/640 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3071 event pairs, 224 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 1245. Up to 502 conditions per place. [2023-08-30 04:13:52,553 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 49 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-30 04:13:52,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 248 flow [2023-08-30 04:13:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-30 04:13:52,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-08-30 04:13:52,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-30 04:13:52,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-30 04:13:52,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:52,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-30 04:13:52,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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 04:13:52,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 04:13:52,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 04:13:52,560 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 118 flow. Second operand 3 states and 396 transitions. [2023-08-30 04:13:52,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 248 flow [2023-08-30 04:13:52,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:13:52,563 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 116 flow [2023-08-30 04:13:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-30 04:13:52,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 04:13:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 116 flow [2023-08-30 04:13:52,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 04:13:52,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:52,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:13:52,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:13:52,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:13:52,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 542205457, now seen corresponding path program 1 times [2023-08-30 04:13:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:52,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162327511] [2023-08-30 04:13:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:52,722 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 04:13:52,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162327511] [2023-08-30 04:13:52,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162327511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:13:52,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998492583] [2023-08-30 04:13:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:52,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:13:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:13:52,737 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 04:13:52,748 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 04:13:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:13:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:13:52,871 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:13:52,923 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 04:13:52,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:13:52,982 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 04:13:52,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998492583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:13:52,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:13:52,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:13:52,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422730726] [2023-08-30 04:13:52,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:13:52,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:13:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:13:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:13:53,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-08-30 04:13:53,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 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 04:13:53,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:53,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-08-30 04:13:53,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:53,238 INFO L130 PetriNetUnfolder]: 31/94 cut-off events. [2023-08-30 04:13:53,238 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:13:53,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 94 events. 31/94 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 6 based on Foata normal form. 15/102 useless extension candidates. Maximal degree in co-relation 197. Up to 60 conditions per place. [2023-08-30 04:13:53,239 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 33 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 04:13:53,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 159 flow [2023-08-30 04:13:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:13:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:13:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-30 04:13:53,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2023-08-30 04:13:53,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-30 04:13:53,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-30 04:13:53,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:53,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-30 04:13:53,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 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 04:13:53,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 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 04:13:53,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 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 04:13:53,246 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 116 flow. Second operand 4 states and 489 transitions. [2023-08-30 04:13:53,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 159 flow [2023-08-30 04:13:53,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:13:53,248 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 58 flow [2023-08-30 04:13:53,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 04:13:53,249 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -22 predicate places. [2023-08-30 04:13:53,249 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 58 flow [2023-08-30 04:13:53,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 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 04:13:53,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:53,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:13:53,266 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 04:13:53,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:13:53,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:13:53,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash -371499561, now seen corresponding path program 1 times [2023-08-30 04:13:53,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:53,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674492024] [2023-08-30 04:13:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:13:53,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:13:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:13:53,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:13:53,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:13:53,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 04:13:53,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-30 04:13:53,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-30 04:13:53,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-30 04:13:53,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-30 04:13:53,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-30 04:13:53,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-30 04:13:53,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-08-30 04:13:53,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-30 04:13:53,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:13:53,502 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:13:53,504 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:13:53,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:13:53,528 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:13:53,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,582 INFO L130 PetriNetUnfolder]: 57/346 cut-off events. [2023-08-30 04:13:53,582 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:13:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 346 events. 57/346 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1350 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 210. Up to 9 conditions per place. [2023-08-30 04:13:53,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:13:53,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 404 flow [2023-08-30 04:13:53,615 INFO L130 PetriNetUnfolder]: 57/346 cut-off events. [2023-08-30 04:13:53,615 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:13:53,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 346 events. 57/346 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1350 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 210. Up to 9 conditions per place. [2023-08-30 04:13:53,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 17280 [2023-08-30 04:13:56,433 INFO L134 LiptonReduction]: Checked pairs total: 49329 [2023-08-30 04:13:56,433 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 04:13:56,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:13:56,436 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;@236c3a1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:13:56,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 04:13:56,438 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:13:56,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:13:56,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:56,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:13:56,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:13:56,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash 30242, now seen corresponding path program 1 times [2023-08-30 04:13:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:56,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071088113] [2023-08-30 04:13:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:56,483 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 04:13:56,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:56,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071088113] [2023-08-30 04:13:56,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071088113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:56,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:56,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:56,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364410420] [2023-08-30 04:13:56,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:56,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 330 [2023-08-30 04:13:56,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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 04:13:56,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:56,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 330 [2023-08-30 04:13:56,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:57,442 INFO L130 PetriNetUnfolder]: 6765/11677 cut-off events. [2023-08-30 04:13:57,443 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 04:13:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22176 conditions, 11677 events. 6765/11677 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 89516 event pairs, 2964 based on Foata normal form. 2051/10950 useless extension candidates. Maximal degree in co-relation 3365. Up to 10391 conditions per place. [2023-08-30 04:13:57,510 INFO L137 encePairwiseOnDemand]: 300/330 looper letters, 64 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-30 04:13:57,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 328 flow [2023-08-30 04:13:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 04:13:57,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5646464646464646 [2023-08-30 04:13:57,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 04:13:57,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 04:13:57,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:57,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 04:13:57,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 04:13:57,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:57,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:57,519 INFO L175 Difference]: Start difference. First operand has 75 places, 100 transitions, 218 flow. Second operand 3 states and 559 transitions. [2023-08-30 04:13:57,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 328 flow [2023-08-30 04:13:57,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:13:57,524 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 180 flow [2023-08-30 04:13:57,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-08-30 04:13:57,526 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-30 04:13:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 180 flow [2023-08-30 04:13:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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 04:13:57,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:57,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:13:57,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:13:57,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:13:57,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash 30241, now seen corresponding path program 1 times [2023-08-30 04:13:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:57,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586706541] [2023-08-30 04:13:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:57,561 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 04:13:57,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:57,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586706541] [2023-08-30 04:13:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586706541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:57,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:57,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635174385] [2023-08-30 04:13:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 330 [2023-08-30 04:13:57,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 04:13:57,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:57,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 330 [2023-08-30 04:13:57,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:58,424 INFO L130 PetriNetUnfolder]: 6104/10504 cut-off events. [2023-08-30 04:13:58,424 INFO L131 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2023-08-30 04:13:58,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20502 conditions, 10504 events. 6104/10504 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 78671 event pairs, 4970 based on Foata normal form. 0/8305 useless extension candidates. Maximal degree in co-relation 20406. Up to 8356 conditions per place. [2023-08-30 04:13:58,490 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 72 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-30 04:13:58,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 376 flow [2023-08-30 04:13:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-30 04:13:58,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282828282828282 [2023-08-30 04:13:58,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-30 04:13:58,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-30 04:13:58,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:58,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-30 04:13:58,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 04:13:58,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:58,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:58,507 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 180 flow. Second operand 3 states and 523 transitions. [2023-08-30 04:13:58,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 376 flow [2023-08-30 04:13:58,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:13:58,510 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 180 flow [2023-08-30 04:13:58,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-08-30 04:13:58,511 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-30 04:13:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 180 flow [2023-08-30 04:13:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 04:13:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:13:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:13:58,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:13:58,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2113729896, now seen corresponding path program 1 times [2023-08-30 04:13:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869348097] [2023-08-30 04:13:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:58,593 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 04:13:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:58,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869348097] [2023-08-30 04:13:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869348097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:13:58,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072817613] [2023-08-30 04:13:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:13:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:13:58,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:13:58,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:13:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:13:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:13:58,678 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:13:58,725 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 04:13:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:13:58,771 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 04:13:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072817613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:13:58,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:13:58,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:13:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051009981] [2023-08-30 04:13:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:13:58,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:13:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:13:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:13:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 330 [2023-08-30 04:13:58,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 180 flow. Second operand has 8 states, 8 states have (on average 149.875) internal successors, (1199), 8 states have internal predecessors, (1199), 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 04:13:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 330 [2023-08-30 04:13:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:59,187 INFO L130 PetriNetUnfolder]: 817/1608 cut-off events. [2023-08-30 04:13:59,187 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2023-08-30 04:13:59,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1608 events. 817/1608 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10449 event pairs, 48 based on Foata normal form. 168/1594 useless extension candidates. Maximal degree in co-relation 3399. Up to 936 conditions per place. [2023-08-30 04:13:59,196 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 67 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-30 04:13:59,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 332 flow [2023-08-30 04:13:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:13:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:13:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 814 transitions. [2023-08-30 04:13:59,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-08-30 04:13:59,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 814 transitions. [2023-08-30 04:13:59,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 814 transitions. [2023-08-30 04:13:59,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:59,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 814 transitions. [2023-08-30 04:13:59,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.8) internal successors, (814), 5 states have internal predecessors, (814), 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 04:13:59,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 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 04:13:59,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 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 04:13:59,205 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 180 flow. Second operand 5 states and 814 transitions. [2023-08-30 04:13:59,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 332 flow [2023-08-30 04:13:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 329 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:13:59,208 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 117 flow [2023-08-30 04:13:59,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-08-30 04:13:59,209 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -19 predicate places. [2023-08-30 04:13:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 117 flow [2023-08-30 04:13:59,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 149.875) internal successors, (1199), 8 states have internal predecessors, (1199), 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 04:13:59,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:59,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:13:59,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:13:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 04:13:59,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:13:59,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1095060451, now seen corresponding path program 1 times [2023-08-30 04:13:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560436310] [2023-08-30 04:13:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:13:59,467 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 04:13:59,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:13:59,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560436310] [2023-08-30 04:13:59,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560436310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:13:59,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:13:59,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:13:59,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384945179] [2023-08-30 04:13:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:13:59,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:13:59,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:13:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:13:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:13:59,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 330 [2023-08-30 04:13:59,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 04:13:59,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:13:59,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 330 [2023-08-30 04:13:59,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:13:59,528 INFO L130 PetriNetUnfolder]: 152/291 cut-off events. [2023-08-30 04:13:59,529 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-30 04:13:59,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 291 events. 152/291 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1207 event pairs, 152 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 665. Up to 274 conditions per place. [2023-08-30 04:13:59,530 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 04:13:59,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 20 transitions, 95 flow [2023-08-30 04:13:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:13:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:13:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-30 04:13:59,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626262626262626 [2023-08-30 04:13:59,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-30 04:13:59,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-30 04:13:59,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:13:59,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-30 04:13:59,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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 04:13:59,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:59,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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 04:13:59,536 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 117 flow. Second operand 3 states and 458 transitions. [2023-08-30 04:13:59,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 20 transitions, 95 flow [2023-08-30 04:13:59,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 88 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:13:59,538 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 58 flow [2023-08-30 04:13:59,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-30 04:13:59,539 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -45 predicate places. [2023-08-30 04:13:59,539 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 58 flow [2023-08-30 04:13:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 04:13:59,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:13:59,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:13:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:13:59,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:13:59,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:13:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2076039172, now seen corresponding path program 1 times [2023-08-30 04:13:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:13:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613957684] [2023-08-30 04:13:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:13:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:13:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:13:59,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:13:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:13:59,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:13:59,577 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:13:59,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 04:13:59,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-30 04:13:59,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-30 04:13:59,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 04:13:59,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-30 04:13:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-30 04:13:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 04:13:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-30 04:13:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 04:13:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 04:13:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:13:59,578 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:13:59,579 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:13:59,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:13:59,605 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:13:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,662 INFO L130 PetriNetUnfolder]: 86/525 cut-off events. [2023-08-30 04:13:59,663 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:13:59,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 525 events. 86/525 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2178 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-30 04:13:59,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:13:59,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 240 transitions, 510 flow [2023-08-30 04:13:59,728 INFO L130 PetriNetUnfolder]: 86/525 cut-off events. [2023-08-30 04:13:59,728 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:13:59,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 525 events. 86/525 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2178 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-30 04:13:59,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 32400 [2023-08-30 04:14:02,492 INFO L134 LiptonReduction]: Checked pairs total: 99643 [2023-08-30 04:14:02,493 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-30 04:14:02,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:02,495 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;@236c3a1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:02,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 04:14:02,497 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:14:02,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:02,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:02,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:02,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:14:02,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash 44816, now seen corresponding path program 1 times [2023-08-30 04:14:02,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:02,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712516756] [2023-08-30 04:14:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:02,520 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 04:14:02,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712516756] [2023-08-30 04:14:02,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712516756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853932994] [2023-08-30 04:14:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:02,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:02,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:02,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 408 [2023-08-30 04:14:02,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 04:14:02,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:02,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 408 [2023-08-30 04:14:02,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:15,880 INFO L130 PetriNetUnfolder]: 152124/222261 cut-off events. [2023-08-30 04:14:15,880 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2023-08-30 04:14:16,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429667 conditions, 222261 events. 152124/222261 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 5245. Compared 1835723 event pairs, 125145 based on Foata normal form. 29147/209904 useless extension candidates. Maximal degree in co-relation 53173. Up to 183539 conditions per place. [2023-08-30 04:14:17,588 INFO L137 encePairwiseOnDemand]: 368/408 looper letters, 104 selfloop transitions, 3 changer transitions 0/132 dead transitions. [2023-08-30 04:14:17,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 508 flow [2023-08-30 04:14:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-08-30 04:14:17,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898692810457516 [2023-08-30 04:14:17,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-08-30 04:14:17,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-08-30 04:14:17,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:17,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-08-30 04:14:17,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 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 04:14:17,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:17,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:17,601 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 292 flow. Second operand 3 states and 722 transitions. [2023-08-30 04:14:17,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 508 flow [2023-08-30 04:14:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:14:17,606 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 220 flow [2023-08-30 04:14:17,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2023-08-30 04:14:17,609 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -2 predicate places. [2023-08-30 04:14:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 220 flow [2023-08-30 04:14:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 04:14:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:14:17,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:14:17,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 44817, now seen corresponding path program 1 times [2023-08-30 04:14:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112477351] [2023-08-30 04:14:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:17,647 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 04:14:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112477351] [2023-08-30 04:14:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112477351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:17,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:17,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:17,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212693109] [2023-08-30 04:14:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 408 [2023-08-30 04:14:17,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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 04:14:17,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:17,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 408 [2023-08-30 04:14:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:29,626 INFO L130 PetriNetUnfolder]: 152123/219895 cut-off events. [2023-08-30 04:14:29,626 INFO L131 PetriNetUnfolder]: For 1891/1891 co-relation queries the response was YES. [2023-08-30 04:14:30,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433170 conditions, 219895 events. 152123/219895 cut-off events. For 1891/1891 co-relation queries the response was YES. Maximal size of possible extension queue 5239. Compared 1780381 event pairs, 116123 based on Foata normal form. 0/181658 useless extension candidates. Maximal degree in co-relation 382705. Up to 205799 conditions per place. [2023-08-30 04:14:31,076 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 80 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-30 04:14:31,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 414 flow [2023-08-30 04:14:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-30 04:14:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269607843137255 [2023-08-30 04:14:31,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-30 04:14:31,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-30 04:14:31,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:31,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-30 04:14:31,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 04:14:31,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:31,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:31,084 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 220 flow. Second operand 3 states and 645 transitions. [2023-08-30 04:14:31,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 414 flow [2023-08-30 04:14:33,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 107 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:14:33,965 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 228 flow [2023-08-30 04:14:33,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2023-08-30 04:14:33,966 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -1 predicate places. [2023-08-30 04:14:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 228 flow [2023-08-30 04:14:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 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 04:14:33,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:14:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:14:33,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:14:33,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1525364318, now seen corresponding path program 1 times [2023-08-30 04:14:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936579333] [2023-08-30 04:14:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:34,023 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 04:14:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936579333] [2023-08-30 04:14:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936579333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:14:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339103680] [2023-08-30 04:14:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:34,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:14:34,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:14:34,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:14:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:14:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:14:34,110 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:14:34,149 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 04:14:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:14:34,198 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 04:14:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339103680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:14:34,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:14:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:14:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23313980] [2023-08-30 04:14:34,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:14:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:14:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:14:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:14:34,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 408 [2023-08-30 04:14:34,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 184.875) internal successors, (1479), 8 states have internal predecessors, (1479), 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 04:14:34,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:34,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 408 [2023-08-30 04:14:34,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:35,972 INFO L130 PetriNetUnfolder]: 20060/31466 cut-off events. [2023-08-30 04:14:35,973 INFO L131 PetriNetUnfolder]: For 8958/8958 co-relation queries the response was YES. [2023-08-30 04:14:36,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67476 conditions, 31466 events. 20060/31466 cut-off events. For 8958/8958 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 239837 event pairs, 1000 based on Foata normal form. 2561/31064 useless extension candidates. Maximal degree in co-relation 37461. Up to 18928 conditions per place. [2023-08-30 04:14:36,153 INFO L137 encePairwiseOnDemand]: 404/408 looper letters, 127 selfloop transitions, 4 changer transitions 0/150 dead transitions. [2023-08-30 04:14:36,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 150 transitions, 593 flow [2023-08-30 04:14:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:14:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:14:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1235 transitions. [2023-08-30 04:14:36,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044934640522876 [2023-08-30 04:14:36,157 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1235 transitions. [2023-08-30 04:14:36,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1235 transitions. [2023-08-30 04:14:36,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:36,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1235 transitions. [2023-08-30 04:14:36,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 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 04:14:36,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 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 04:14:36,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 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 04:14:36,333 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 228 flow. Second operand 6 states and 1235 transitions. [2023-08-30 04:14:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 150 transitions, 593 flow [2023-08-30 04:14:36,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 150 transitions, 585 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 04:14:36,347 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 165 flow [2023-08-30 04:14:36,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-08-30 04:14:36,348 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -21 predicate places. [2023-08-30 04:14:36,348 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 165 flow [2023-08-30 04:14:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.875) internal successors, (1479), 8 states have internal predecessors, (1479), 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 04:14:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:14:36,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:14:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:14:36,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:14:36,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash -33532384, now seen corresponding path program 1 times [2023-08-30 04:14:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158648834] [2023-08-30 04:14:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:36,614 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 04:14:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:36,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158648834] [2023-08-30 04:14:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158648834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448011191] [2023-08-30 04:14:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:36,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:36,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:36,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 408 [2023-08-30 04:14:36,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 04:14:36,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:36,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 408 [2023-08-30 04:14:36,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:14:36,850 INFO L130 PetriNetUnfolder]: 2224/3463 cut-off events. [2023-08-30 04:14:36,850 INFO L131 PetriNetUnfolder]: For 1208/1208 co-relation queries the response was YES. [2023-08-30 04:14:36,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7646 conditions, 3463 events. 2224/3463 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17660 event pairs, 2224 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 4167. Up to 3276 conditions per place. [2023-08-30 04:14:36,867 INFO L137 encePairwiseOnDemand]: 401/408 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 04:14:36,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 28 transitions, 137 flow [2023-08-30 04:14:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:14:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:14:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-30 04:14:36,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2023-08-30 04:14:36,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-30 04:14:36,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-30 04:14:36,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:14:36,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-30 04:14:36,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 04:14:36,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:36,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 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 04:14:36,874 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 165 flow. Second operand 3 states and 560 transitions. [2023-08-30 04:14:36,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 28 transitions, 137 flow [2023-08-30 04:14:36,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 28 transitions, 128 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 04:14:36,876 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 80 flow [2023-08-30 04:14:36,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-30 04:14:36,877 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -58 predicate places. [2023-08-30 04:14:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 80 flow [2023-08-30 04:14:36,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 04:14:36,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:36,879 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:14:36,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:14:36,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:14:36,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash -213770834, now seen corresponding path program 1 times [2023-08-30 04:14:36,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:36,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425785092] [2023-08-30 04:14:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:36,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:36,902 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:14:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:14:36,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:14:36,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:14:36,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 04:14:36,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-30 04:14:36,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-08-30 04:14:36,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-08-30 04:14:36,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-08-30 04:14:36,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-30 04:14:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:14:36,927 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:14:36,928 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:14:36,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:14:36,955 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:14:36,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,049 INFO L130 PetriNetUnfolder]: 127/788 cut-off events. [2023-08-30 04:14:37,050 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:14:37,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 788 events. 127/788 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3604 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 545. Up to 32 conditions per place. [2023-08-30 04:14:37,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,070 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:14:37,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 287 transitions, 618 flow [2023-08-30 04:14:37,158 INFO L130 PetriNetUnfolder]: 127/788 cut-off events. [2023-08-30 04:14:37,158 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:14:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 788 events. 127/788 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3604 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 545. Up to 32 conditions per place. [2023-08-30 04:14:37,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 51840 [2023-08-30 04:14:40,125 INFO L134 LiptonReduction]: Checked pairs total: 164126 [2023-08-30 04:14:40,125 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-08-30 04:14:40,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:14:40,127 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;@236c3a1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:14:40,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 04:14:40,128 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:14:40,129 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:14:40,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:14:40,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:14:40,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 04:14:40,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:14:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash 62029, now seen corresponding path program 1 times [2023-08-30 04:14:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:14:40,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295080588] [2023-08-30 04:14:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:14:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:14:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:14:40,148 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 04:14:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:14:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295080588] [2023-08-30 04:14:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295080588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:14:40,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:14:40,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:14:40,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377427191] [2023-08-30 04:14:40,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:14:40,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:14:40,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:14:40,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:14:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:14:40,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 491 [2023-08-30 04:14:40,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 160 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 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 04:14:40,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:14:40,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 491 [2023-08-30 04:14:40,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand