./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.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_37-indirect_racing.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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --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 04:11:39,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:11:39,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:11:39,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:11:39,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:11:39,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:11:39,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:11:39,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:11:39,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:11:39,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:11:39,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:11:39,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:11:39,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:11:39,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:11:39,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:11:39,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:11:39,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:11:39,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:11:39,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:11:39,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:11:39,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:11:39,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:11:39,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:11:39,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:11:39,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:11:39,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:11:39,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:11:39,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:11:39,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:11:39,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:11:39,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:11:39,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:11:39,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:11:39,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:11:39,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:11:39,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:11:39,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:11:39,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:11:39,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:11:39,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:11:39,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:11:39,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:11:39,885 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:11:39,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:11:39,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:11:39,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:11:39,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:11:39,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:11:39,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:11:39,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:11:39,888 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:11:39,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:11:39,888 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:11:39,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:11:39,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:11:39,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:11:39,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:11:39,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:11:39,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:11:39,891 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:11:39,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:11:40,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:11:40,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:11:40,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:11:40,215 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:11:40,217 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:11:40,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-30 04:11:41,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:11:41,671 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:11:41,672 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-30 04:11:41,687 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebd933e2/c4d5309ee10249f5bdf4e963708f2732/FLAG31a57c317 [2023-08-30 04:11:41,708 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebd933e2/c4d5309ee10249f5bdf4e963708f2732 [2023-08-30 04:11:41,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:11:41,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:11:41,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:11:41,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:11:41,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:11:41,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:11:41" (1/1) ... [2023-08-30 04:11:41,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd9cc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:41, skipping insertion in model container [2023-08-30 04:11:41,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:11:41" (1/1) ... [2023-08-30 04:11:41,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:11:41,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:11:42,086 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_37-indirect_racing.i[30176,30189] [2023-08-30 04:11:42,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:11:42,133 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:11:42,170 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_37-indirect_racing.i[30176,30189] [2023-08-30 04:11:42,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:11:42,212 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:11:42,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42 WrapperNode [2023-08-30 04:11:42,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:11:42,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:11:42,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:11:42,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:11:42,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,259 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-08-30 04:11:42,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:11:42,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:11:42,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:11:42,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:11:42,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:11:42,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:11:42,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:11:42,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:11:42,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (1/1) ... [2023-08-30 04:11:42,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:11:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:11:42,342 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 04:11:42,357 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 04:11:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:11:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:11:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:11:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:11:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:11:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:11:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:11:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:11:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:11:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:11:42,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:11:42,389 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 04:11:42,540 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:11:42,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:11:42,764 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:11:42,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:11:42,771 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:11:42,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:11:42 BoogieIcfgContainer [2023-08-30 04:11:42,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:11:42,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:11:42,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:11:42,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:11:42,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:11:41" (1/3) ... [2023-08-30 04:11:42,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0c9518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:11:42, skipping insertion in model container [2023-08-30 04:11:42,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:42" (2/3) ... [2023-08-30 04:11:42,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0c9518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:11:42, skipping insertion in model container [2023-08-30 04:11:42,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:11:42" (3/3) ... [2023-08-30 04:11:42,781 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-08-30 04:11:42,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:11:42,802 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 04:11:42,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:11:42,861 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:11:42,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:42,942 INFO L130 PetriNetUnfolder]: 17/167 cut-off events. [2023-08-30 04:11:42,942 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:11:42,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 17/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 502 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-30 04:11:42,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:42,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:42,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:11:42,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:42,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:42,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 260 flow [2023-08-30 04:11:43,003 INFO L130 PetriNetUnfolder]: 17/167 cut-off events. [2023-08-30 04:11:43,009 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:11:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 17/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 502 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-30 04:11:43,014 INFO L119 LiptonReduction]: Number of co-enabled transitions 3760 [2023-08-30 04:11:46,881 INFO L134 LiptonReduction]: Checked pairs total: 7925 [2023-08-30 04:11:46,882 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-30 04:11:46,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:11:46,910 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;@46766f77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:11:46,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-30 04:11:46,913 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:11:46,913 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:11:46,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:46,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:11:46,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 04:11:46,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash 15552, now seen corresponding path program 1 times [2023-08-30 04:11:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:46,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820754410] [2023-08-30 04:11:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:47,235 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 04:11:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820754410] [2023-08-30 04:11:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820754410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934949734] [2023-08-30 04:11:47,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:47,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:47,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 238 [2023-08-30 04:11:47,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 04:11:47,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:47,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 238 [2023-08-30 04:11:47,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:47,451 INFO L130 PetriNetUnfolder]: 157/391 cut-off events. [2023-08-30 04:11:47,452 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:11:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 391 events. 157/391 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2092 event pairs, 132 based on Foata normal form. 14/274 useless extension candidates. Maximal degree in co-relation 706. Up to 301 conditions per place. [2023-08-30 04:11:47,456 INFO L137 encePairwiseOnDemand]: 223/238 looper letters, 38 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-30 04:11:47,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 186 flow [2023-08-30 04:11:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-30 04:11:47,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224089635854342 [2023-08-30 04:11:47,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-30 04:11:47,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-30 04:11:47,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:47,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-30 04:11:47,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 04:11:47,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:47,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:47,482 INFO L175 Difference]: Start difference. First operand has 42 places, 48 transitions, 104 flow. Second operand 3 states and 373 transitions. [2023-08-30 04:11:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 186 flow [2023-08-30 04:11:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:11:47,486 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 86 flow [2023-08-30 04:11:47,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-30 04:11:47,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-30 04:11:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 86 flow [2023-08-30 04:11:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 04:11:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:11:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:11:47,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 04:11:47,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash 15554, now seen corresponding path program 1 times [2023-08-30 04:11:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354051545] [2023-08-30 04:11:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:47,576 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 04:11:47,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:47,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354051545] [2023-08-30 04:11:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354051545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:47,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456259411] [2023-08-30 04:11:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:47,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:47,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:47,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 238 [2023-08-30 04:11:47,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 04:11:47,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:47,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 238 [2023-08-30 04:11:47,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:47,752 INFO L130 PetriNetUnfolder]: 156/386 cut-off events. [2023-08-30 04:11:47,752 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 04:11:47,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 386 events. 156/386 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1968 event pairs, 132 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 736. Up to 332 conditions per place. [2023-08-30 04:11:47,755 INFO L137 encePairwiseOnDemand]: 234/238 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-30 04:11:47,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 196 flow [2023-08-30 04:11:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-30 04:11:47,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511204481792717 [2023-08-30 04:11:47,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-30 04:11:47,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-30 04:11:47,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:47,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-30 04:11:47,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 04:11:47,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:47,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:47,763 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 86 flow. Second operand 3 states and 365 transitions. [2023-08-30 04:11:47,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 196 flow [2023-08-30 04:11:47,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:11:47,765 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 90 flow [2023-08-30 04:11:47,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-30 04:11:47,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-30 04:11:47,766 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 90 flow [2023-08-30 04:11:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 04:11:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:11:47,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:11:47,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 04:11:47,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 463683918, now seen corresponding path program 1 times [2023-08-30 04:11:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002961351] [2023-08-30 04:11:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:47,861 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 04:11:47,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002961351] [2023-08-30 04:11:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002961351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:11:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125400391] [2023-08-30 04:11:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:11:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:11:47,869 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 04:11:47,893 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 04:11:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:47,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:11:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:11:48,003 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 04:11:48,081 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 04:11:48,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:11:48,165 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 04:11:48,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125400391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:11:48,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:11:48,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:11:48,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802132872] [2023-08-30 04:11:48,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:11:48,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:11:48,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:11:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:11:48,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 238 [2023-08-30 04:11:48,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 90 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 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 04:11:48,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:48,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 238 [2023-08-30 04:11:48,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:48,492 INFO L130 PetriNetUnfolder]: 24/79 cut-off events. [2023-08-30 04:11:48,492 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 04:11:48,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 79 events. 24/79 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 213 event pairs, 11 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 160. Up to 50 conditions per place. [2023-08-30 04:11:48,493 INFO L137 encePairwiseOnDemand]: 234/238 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-30 04:11:48,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-30 04:11:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:11:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:11:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-30 04:11:48,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653361344537815 [2023-08-30 04:11:48,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-30 04:11:48,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-30 04:11:48,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:48,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-30 04:11:48,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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 04:11:48,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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 04:11:48,503 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 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 04:11:48,503 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 90 flow. Second operand 4 states and 443 transitions. [2023-08-30 04:11:48,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-30 04:11:48,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:11:48,505 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2023-08-30 04:11:48,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 04:11:48,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -14 predicate places. [2023-08-30 04:11:48,507 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2023-08-30 04:11:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 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 04:11:48,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:48,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:11:48,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:11:48,713 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 04:11:48,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 04:11:48,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1489288611, now seen corresponding path program 1 times [2023-08-30 04:11:48,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:48,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677983543] [2023-08-30 04:11:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:48,909 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 04:11:48,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:48,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677983543] [2023-08-30 04:11:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677983543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:48,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:48,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:11:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891193200] [2023-08-30 04:11:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:48,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:11:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:11:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:11:48,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 238 [2023-08-30 04:11:48,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 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 04:11:48,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:48,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 238 [2023-08-30 04:11:48,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:49,013 INFO L130 PetriNetUnfolder]: 20/68 cut-off events. [2023-08-30 04:11:49,013 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 04:11:49,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 68 events. 20/68 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 161 event pairs, 20 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 124. Up to 55 conditions per place. [2023-08-30 04:11:49,014 INFO L137 encePairwiseOnDemand]: 235/238 looper letters, 13 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-30 04:11:49,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 77 flow [2023-08-30 04:11:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-30 04:11:49,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45518207282913165 [2023-08-30 04:11:49,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-30 04:11:49,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-30 04:11:49,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:49,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-30 04:11:49,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 04:11:49,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:49,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 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 04:11:49,026 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 53 flow. Second operand 3 states and 325 transitions. [2023-08-30 04:11:49,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 77 flow [2023-08-30 04:11:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:11:49,027 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 48 flow [2023-08-30 04:11:49,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, 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=48, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-08-30 04:11:49,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -16 predicate places. [2023-08-30 04:11:49,030 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 48 flow [2023-08-30 04:11:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 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 04:11:49,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:49,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:11:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:11:49,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 04:11:49,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1489299882, now seen corresponding path program 1 times [2023-08-30 04:11:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:49,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352323467] [2023-08-30 04:11:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:11:49,067 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:11:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:11:49,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:11:49,092 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:11:49,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-08-30 04:11:49,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-08-30 04:11:49,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-08-30 04:11:49,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-08-30 04:11:49,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-08-30 04:11:49,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-08-30 04:11:49,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-08-30 04:11:49,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2023-08-30 04:11:49,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2023-08-30 04:11:49,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-08-30 04:11:49,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-08-30 04:11:49,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-08-30 04:11:49,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-08-30 04:11:49,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-08-30 04:11:49,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-08-30 04:11:49,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-08-30 04:11:49,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-08-30 04:11:49,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2023-08-30 04:11:49,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-08-30 04:11:49,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-08-30 04:11:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-08-30 04:11:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-08-30 04:11:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-08-30 04:11:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-08-30 04:11:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-08-30 04:11:49,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:11:49,100 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:11:49,102 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:11:49,102 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:11:49,122 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:11:49,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,150 INFO L130 PetriNetUnfolder]: 31/279 cut-off events. [2023-08-30 04:11:49,151 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:11:49,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 279 events. 31/279 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 993 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-30 04:11:49,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:11:49,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 168 transitions, 354 flow [2023-08-30 04:11:49,190 INFO L130 PetriNetUnfolder]: 31/279 cut-off events. [2023-08-30 04:11:49,190 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:11:49,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 279 events. 31/279 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 993 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-30 04:11:49,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 11600 [2023-08-30 04:11:52,634 INFO L134 LiptonReduction]: Checked pairs total: 29707 [2023-08-30 04:11:52,634 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-30 04:11:52,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:11:52,637 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;@46766f77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:11:52,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-08-30 04:11:52,639 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:11:52,639 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:11:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:11:52,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:52,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash 26935, now seen corresponding path program 1 times [2023-08-30 04:11:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179586434] [2023-08-30 04:11:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:52,689 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 04:11:52,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:52,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179586434] [2023-08-30 04:11:52,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179586434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:52,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:52,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63507843] [2023-08-30 04:11:52,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:52,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:52,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:52,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:52,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 314 [2023-08-30 04:11:52,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 04:11:52,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:52,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 314 [2023-08-30 04:11:52,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:53,603 INFO L130 PetriNetUnfolder]: 5956/10172 cut-off events. [2023-08-30 04:11:53,604 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-08-30 04:11:53,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19716 conditions, 10172 events. 5956/10172 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 75165 event pairs, 2821 based on Foata normal form. 472/6635 useless extension candidates. Maximal degree in co-relation 2241. Up to 9422 conditions per place. [2023-08-30 04:11:53,711 INFO L137 encePairwiseOnDemand]: 292/314 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 04:11:53,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 294 flow [2023-08-30 04:11:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-30 04:11:53,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456475583864119 [2023-08-30 04:11:53,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-30 04:11:53,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-30 04:11:53,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:53,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-30 04:11:53,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:53,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:53,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:53,721 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 172 flow. Second operand 3 states and 514 transitions. [2023-08-30 04:11:53,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 294 flow [2023-08-30 04:11:53,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:11:53,726 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 150 flow [2023-08-30 04:11:53,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-30 04:11:53,730 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-08-30 04:11:53,730 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 150 flow [2023-08-30 04:11:53,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 04:11:53,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:53,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:11:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:11:53,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:53,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash 26936, now seen corresponding path program 1 times [2023-08-30 04:11:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:53,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118496184] [2023-08-30 04:11:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:53,756 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 04:11:53,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118496184] [2023-08-30 04:11:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118496184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:53,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557071670] [2023-08-30 04:11:53,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:53,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 314 [2023-08-30 04:11:53,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 04:11:53,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:53,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 314 [2023-08-30 04:11:53,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:54,552 INFO L130 PetriNetUnfolder]: 5189/8667 cut-off events. [2023-08-30 04:11:54,552 INFO L131 PetriNetUnfolder]: For 497/497 co-relation queries the response was YES. [2023-08-30 04:11:54,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17639 conditions, 8667 events. 5189/8667 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61642 event pairs, 4394 based on Foata normal form. 0/5603 useless extension candidates. Maximal degree in co-relation 17537. Up to 7005 conditions per place. [2023-08-30 04:11:54,606 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 69 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-30 04:11:54,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 342 flow [2023-08-30 04:11:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-30 04:11:54,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169851380042463 [2023-08-30 04:11:54,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-30 04:11:54,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-30 04:11:54,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:54,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-30 04:11:54,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 04:11:54,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:54,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:54,617 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 150 flow. Second operand 3 states and 487 transitions. [2023-08-30 04:11:54,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 342 flow [2023-08-30 04:11:54,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:11:54,620 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 150 flow [2023-08-30 04:11:54,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-30 04:11:54,620 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-30 04:11:54,621 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 150 flow [2023-08-30 04:11:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 04:11:54,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:54,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:11:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:11:54,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:54,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash -875137472, now seen corresponding path program 1 times [2023-08-30 04:11:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:54,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705806100] [2023-08-30 04:11:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:54,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:54,718 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 04:11:54,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:54,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705806100] [2023-08-30 04:11:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705806100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:54,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:54,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590022590] [2023-08-30 04:11:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:54,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 314 [2023-08-30 04:11:54,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 04:11:54,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:54,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 314 [2023-08-30 04:11:54,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:55,338 INFO L130 PetriNetUnfolder]: 3797/6457 cut-off events. [2023-08-30 04:11:55,338 INFO L131 PetriNetUnfolder]: For 487/487 co-relation queries the response was YES. [2023-08-30 04:11:55,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13418 conditions, 6457 events. 3797/6457 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 43645 event pairs, 3784 based on Foata normal form. 357/4851 useless extension candidates. Maximal degree in co-relation 11230. Up to 6073 conditions per place. [2023-08-30 04:11:55,382 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 41 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-30 04:11:55,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 226 flow [2023-08-30 04:11:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-30 04:11:55,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47770700636942676 [2023-08-30 04:11:55,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-30 04:11:55,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-30 04:11:55,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:55,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-30 04:11:55,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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 04:11:55,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:55,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:55,389 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 150 flow. Second operand 3 states and 450 transitions. [2023-08-30 04:11:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 226 flow [2023-08-30 04:11:55,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:11:55,401 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 138 flow [2023-08-30 04:11:55,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-30 04:11:55,402 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-08-30 04:11:55,403 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 138 flow [2023-08-30 04:11:55,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 04:11:55,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:55,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:11:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:11:55,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:55,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash -875338348, now seen corresponding path program 1 times [2023-08-30 04:11:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:55,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156601007] [2023-08-30 04:11:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:55,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:55,517 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 04:11:55,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:55,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156601007] [2023-08-30 04:11:55,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156601007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:11:55,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043104385] [2023-08-30 04:11:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:55,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:11:55,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:11:55,521 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 04:11:55,525 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 04:11:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:11:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:11:55,611 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 04:11:55,649 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 04:11:55,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:11:55,691 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 04:11:55,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043104385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:11:55,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:11:55,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:11:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997445231] [2023-08-30 04:11:55,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:11:55,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:11:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:11:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:11:56,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 314 [2023-08-30 04:11:56,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 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 04:11:56,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:56,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 314 [2023-08-30 04:11:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:56,265 INFO L130 PetriNetUnfolder]: 682/1361 cut-off events. [2023-08-30 04:11:56,265 INFO L131 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2023-08-30 04:11:56,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 1361 events. 682/1361 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8191 event pairs, 0 based on Foata normal form. 156/1278 useless extension candidates. Maximal degree in co-relation 2993. Up to 816 conditions per place. [2023-08-30 04:11:56,273 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 60 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-30 04:11:56,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 292 flow [2023-08-30 04:11:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:11:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:11:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-30 04:11:56,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789808917197452 [2023-08-30 04:11:56,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-30 04:11:56,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-30 04:11:56,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:56,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-30 04:11:56,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 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 04:11:56,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 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 04:11:56,282 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 314.0) internal successors, (1884), 6 states have internal predecessors, (1884), 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 04:11:56,282 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 138 flow. Second operand 5 states and 752 transitions. [2023-08-30 04:11:56,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 292 flow [2023-08-30 04:11:56,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 289 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:11:56,284 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 99 flow [2023-08-30 04:11:56,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-30 04:11:56,285 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -17 predicate places. [2023-08-30 04:11:56,285 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 99 flow [2023-08-30 04:11:56,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 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 04:11:56,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:56,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:11:56,304 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 04:11:56,491 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,SelfDestructingSolverStorable8 [2023-08-30 04:11:56,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:56,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:56,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1359459364, now seen corresponding path program 1 times [2023-08-30 04:11:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212518297] [2023-08-30 04:11:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:56,557 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 04:11:56,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:56,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212518297] [2023-08-30 04:11:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212518297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:56,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:56,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:11:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629414808] [2023-08-30 04:11:56,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:11:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:11:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:11:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 314 [2023-08-30 04:11:56,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 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 04:11:56,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:56,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 314 [2023-08-30 04:11:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:56,757 INFO L130 PetriNetUnfolder]: 468/858 cut-off events. [2023-08-30 04:11:56,758 INFO L131 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2023-08-30 04:11:56,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 858 events. 468/858 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3987 event pairs, 468 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 1911. Up to 800 conditions per place. [2023-08-30 04:11:56,762 INFO L137 encePairwiseOnDemand]: 305/314 looper letters, 23 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 04:11:56,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 131 flow [2023-08-30 04:11:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-08-30 04:11:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182590233545648 [2023-08-30 04:11:56,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-08-30 04:11:56,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-08-30 04:11:56,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:56,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-08-30 04:11:56,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 04:11:56,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:56,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 04:11:56,767 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 99 flow. Second operand 3 states and 394 transitions. [2023-08-30 04:11:56,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 131 flow [2023-08-30 04:11:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:11:56,773 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 78 flow [2023-08-30 04:11:56,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 04:11:56,774 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -26 predicate places. [2023-08-30 04:11:56,774 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 78 flow [2023-08-30 04:11:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 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 04:11:56,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:56,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:11:56,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:11:56,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-30 04:11:56,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash 436509864, now seen corresponding path program 1 times [2023-08-30 04:11:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664301106] [2023-08-30 04:11:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:11:56,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:11:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:11:56,811 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:11:56,812 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:11:56,812 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-08-30 04:11:56,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-08-30 04:11:56,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-08-30 04:11:56,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-08-30 04:11:56,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-08-30 04:11:56,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-08-30 04:11:56,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-08-30 04:11:56,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2023-08-30 04:11:56,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-08-30 04:11:56,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-08-30 04:11:56,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-08-30 04:11:56,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2023-08-30 04:11:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:11:56,819 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 04:11:56,820 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:11:56,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:11:56,853 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:11:56,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,916 INFO L130 PetriNetUnfolder]: 50/432 cut-off events. [2023-08-30 04:11:56,916 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:11:56,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 432 events. 50/432 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1724 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-30 04:11:56,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:11:56,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2023-08-30 04:11:56,980 INFO L130 PetriNetUnfolder]: 50/432 cut-off events. [2023-08-30 04:11:56,981 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:11:56,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 432 events. 50/432 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1724 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-30 04:11:57,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 22560 [2023-08-30 04:12:00,798 INFO L134 LiptonReduction]: Checked pairs total: 61619 [2023-08-30 04:12:00,798 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-30 04:12:00,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:00,800 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;@46766f77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:00,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-30 04:12:00,802 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:12:00,802 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:00,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:00,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:00,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:00,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash 40437, now seen corresponding path program 1 times [2023-08-30 04:12:00,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:00,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280698916] [2023-08-30 04:12:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:00,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:00,841 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 04:12:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280698916] [2023-08-30 04:12:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280698916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:00,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:00,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:00,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420792607] [2023-08-30 04:12:00,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:00,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:00,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:00,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 380 [2023-08-30 04:12:00,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 04:12:00,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:00,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 380 [2023-08-30 04:12:00,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:11,850 INFO L130 PetriNetUnfolder]: 113574/170800 cut-off events. [2023-08-30 04:12:11,851 INFO L131 PetriNetUnfolder]: For 2252/2252 co-relation queries the response was YES. [2023-08-30 04:12:12,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329772 conditions, 170800 events. 113574/170800 cut-off events. For 2252/2252 co-relation queries the response was YES. Maximal size of possible extension queue 5207. Compared 1475836 event pairs, 73933 based on Foata normal form. 9389/115261 useless extension candidates. Maximal degree in co-relation 25623. Up to 157395 conditions per place. [2023-08-30 04:12:13,157 INFO L137 encePairwiseOnDemand]: 350/380 looper letters, 74 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:12:13,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 370 flow [2023-08-30 04:12:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-30 04:12:13,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587719298245614 [2023-08-30 04:12:13,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-30 04:12:13,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-30 04:12:13,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:13,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-30 04:12:13,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 04:12:13,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 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 04:12:13,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 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 04:12:13,165 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 238 flow. Second operand 3 states and 637 transitions. [2023-08-30 04:12:13,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 370 flow [2023-08-30 04:12:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:12:13,171 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 200 flow [2023-08-30 04:12:13,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-30 04:12:13,173 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2023-08-30 04:12:13,173 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 200 flow [2023-08-30 04:12:13,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 04:12:13,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:13,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:13,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:12:13,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:13,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash 40435, now seen corresponding path program 1 times [2023-08-30 04:12:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:13,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432519491] [2023-08-30 04:12:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:13,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:13,197 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 04:12:13,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:13,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432519491] [2023-08-30 04:12:13,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432519491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:13,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:13,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318707778] [2023-08-30 04:12:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:13,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:13,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2023-08-30 04:12:13,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 04:12:13,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:13,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2023-08-30 04:12:13,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:22,372 INFO L130 PetriNetUnfolder]: 99071/146541 cut-off events. [2023-08-30 04:12:22,372 INFO L131 PetriNetUnfolder]: For 7193/7193 co-relation queries the response was YES. [2023-08-30 04:12:22,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293162 conditions, 146541 events. 99071/146541 cut-off events. For 7193/7193 co-relation queries the response was YES. Maximal size of possible extension queue 4427. Compared 1220618 event pairs, 83670 based on Foata normal form. 0/95209 useless extension candidates. Maximal degree in co-relation 293059. Up to 116349 conditions per place. [2023-08-30 04:12:23,238 INFO L137 encePairwiseOnDemand]: 375/380 looper letters, 93 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-08-30 04:12:23,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 114 transitions, 462 flow [2023-08-30 04:12:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:12:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:12:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-30 04:12:23,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537719298245614 [2023-08-30 04:12:23,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-30 04:12:23,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-30 04:12:23,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:23,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-30 04:12:23,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 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 04:12:23,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 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 04:12:23,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 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 04:12:23,245 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 200 flow. Second operand 3 states and 613 transitions. [2023-08-30 04:12:23,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 114 transitions, 462 flow [2023-08-30 04:12:23,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:12:23,253 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 200 flow [2023-08-30 04:12:23,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-30 04:12:23,253 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-30 04:12:23,253 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 200 flow [2023-08-30 04:12:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 04:12:23,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:23,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:12:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:12:23,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:23,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1278706902, now seen corresponding path program 1 times [2023-08-30 04:12:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445919228] [2023-08-30 04:12:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:23,317 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 04:12:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445919228] [2023-08-30 04:12:23,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445919228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:12:23,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698818075] [2023-08-30 04:12:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:23,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:23,320 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 04:12:23,322 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 04:12:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:12:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:12:23,407 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 04:12:23,438 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 04:12:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:12:23,480 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 04:12:23,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698818075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:12:23,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:12:23,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:12:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711024529] [2023-08-30 04:12:23,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:12:23,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:12:23,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:12:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:12:23,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2023-08-30 04:12:23,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:23,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:23,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2023-08-30 04:12:23,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:31,643 INFO L130 PetriNetUnfolder]: 93427/136484 cut-off events. [2023-08-30 04:12:31,644 INFO L131 PetriNetUnfolder]: For 10865/10865 co-relation queries the response was YES. [2023-08-30 04:12:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286205 conditions, 136484 events. 93427/136484 cut-off events. For 10865/10865 co-relation queries the response was YES. Maximal size of possible extension queue 4114. Compared 1119608 event pairs, 43 based on Foata normal form. 14/96475 useless extension candidates. Maximal degree in co-relation 236942. Up to 95740 conditions per place. [2023-08-30 04:12:32,399 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 179 selfloop transitions, 8 changer transitions 0/205 dead transitions. [2023-08-30 04:12:32,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 205 transitions, 842 flow [2023-08-30 04:12:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:12:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:12:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1223 transitions. [2023-08-30 04:12:32,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364035087719298 [2023-08-30 04:12:32,403 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1223 transitions. [2023-08-30 04:12:32,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1223 transitions. [2023-08-30 04:12:32,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:32,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1223 transitions. [2023-08-30 04:12:32,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.83333333333334) internal successors, (1223), 6 states have internal predecessors, (1223), 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 04:12:32,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 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 04:12:32,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 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 04:12:32,411 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 200 flow. Second operand 6 states and 1223 transitions. [2023-08-30 04:12:32,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 205 transitions, 842 flow [2023-08-30 04:12:35,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 205 transitions, 832 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:35,550 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 218 flow [2023-08-30 04:12:35,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2023-08-30 04:12:35,551 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2023-08-30 04:12:35,551 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 218 flow [2023-08-30 04:12:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:35,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:35,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:12:35,556 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 04:12:35,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:35,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:35,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1278481494, now seen corresponding path program 1 times [2023-08-30 04:12:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793528903] [2023-08-30 04:12:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:35,858 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 04:12:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793528903] [2023-08-30 04:12:35,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793528903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:35,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:35,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:12:35,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128217210] [2023-08-30 04:12:35,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:12:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:12:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:12:35,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 380 [2023-08-30 04:12:35,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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 04:12:35,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:35,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 380 [2023-08-30 04:12:35,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:40,277 INFO L130 PetriNetUnfolder]: 57687/86254 cut-off events. [2023-08-30 04:12:40,277 INFO L131 PetriNetUnfolder]: For 12341/12341 co-relation queries the response was YES. [2023-08-30 04:12:40,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178600 conditions, 86254 events. 57687/86254 cut-off events. For 12341/12341 co-relation queries the response was YES. Maximal size of possible extension queue 2507. Compared 677636 event pairs, 47967 based on Foata normal form. 1839/66710 useless extension candidates. Maximal degree in co-relation 55722. Up to 67205 conditions per place. [2023-08-30 04:12:40,963 INFO L137 encePairwiseOnDemand]: 371/380 looper letters, 81 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2023-08-30 04:12:40,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 440 flow [2023-08-30 04:12:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:12:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:12:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 746 transitions. [2023-08-30 04:12:40,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49078947368421055 [2023-08-30 04:12:40,966 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 746 transitions. [2023-08-30 04:12:40,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 746 transitions. [2023-08-30 04:12:40,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:40,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 746 transitions. [2023-08-30 04:12:40,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 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 04:12:40,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 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 04:12:40,971 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 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 04:12:40,971 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 218 flow. Second operand 4 states and 746 transitions. [2023-08-30 04:12:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 440 flow [2023-08-30 04:12:40,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 431 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:40,980 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 207 flow [2023-08-30 04:12:40,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-08-30 04:12:40,981 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-08-30 04:12:40,981 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 207 flow [2023-08-30 04:12:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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 04:12:40,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:40,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:12:40,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:12:40,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:40,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -978221474, now seen corresponding path program 1 times [2023-08-30 04:12:40,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:40,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746218533] [2023-08-30 04:12:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:41,060 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 04:12:41,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746218533] [2023-08-30 04:12:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746218533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:41,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:12:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002186181] [2023-08-30 04:12:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:12:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:12:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:12:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 380 [2023-08-30 04:12:41,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 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 04:12:41,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:41,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 380 [2023-08-30 04:12:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:46,468 INFO L130 PetriNetUnfolder]: 62133/93468 cut-off events. [2023-08-30 04:12:46,468 INFO L131 PetriNetUnfolder]: For 13155/13155 co-relation queries the response was YES. [2023-08-30 04:12:46,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195781 conditions, 93468 events. 62133/93468 cut-off events. For 13155/13155 co-relation queries the response was YES. Maximal size of possible extension queue 2386. Compared 713820 event pairs, 41261 based on Foata normal form. 0/81414 useless extension candidates. Maximal degree in co-relation 119041. Up to 56021 conditions per place. [2023-08-30 04:12:47,129 INFO L137 encePairwiseOnDemand]: 353/380 looper letters, 106 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2023-08-30 04:12:47,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 569 flow [2023-08-30 04:12:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:12:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:12:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2023-08-30 04:12:47,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48092105263157897 [2023-08-30 04:12:47,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2023-08-30 04:12:47,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2023-08-30 04:12:47,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:47,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2023-08-30 04:12:47,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 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 04:12:47,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 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 04:12:47,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 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 04:12:47,137 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 207 flow. Second operand 4 states and 731 transitions. [2023-08-30 04:12:47,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 569 flow [2023-08-30 04:12:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 131 transitions, 563 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:12:47,508 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 365 flow [2023-08-30 04:12:47,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-08-30 04:12:47,508 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2023-08-30 04:12:47,508 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 365 flow [2023-08-30 04:12:47,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 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 04:12:47,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:47,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:12:47,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:12:47,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:47,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:47,510 INFO L85 PathProgramCache]: Analyzing trace with hash -815784578, now seen corresponding path program 1 times [2023-08-30 04:12:47,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:47,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141107426] [2023-08-30 04:12:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:47,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:12:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141107426] [2023-08-30 04:12:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141107426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:12:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187090663] [2023-08-30 04:12:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:12:47,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:12:47,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:12:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:12:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:12:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:12:47,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:12:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:12:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187090663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:12:47,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:12:47,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 04:12:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804070436] [2023-08-30 04:12:47,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:12:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 04:12:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 04:12:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:12:47,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 380 [2023-08-30 04:12:47,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 365 flow. Second operand has 9 states, 9 states have (on average 177.33333333333334) internal successors, (1596), 9 states have internal predecessors, (1596), 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 04:12:47,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:47,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 380 [2023-08-30 04:12:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:12:50,449 INFO L130 PetriNetUnfolder]: 8370/13447 cut-off events. [2023-08-30 04:12:50,449 INFO L131 PetriNetUnfolder]: For 9875/10560 co-relation queries the response was YES. [2023-08-30 04:12:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34903 conditions, 13447 events. 8370/13447 cut-off events. For 9875/10560 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 91208 event pairs, 316 based on Foata normal form. 1254/14382 useless extension candidates. Maximal degree in co-relation 34893. Up to 8355 conditions per place. [2023-08-30 04:12:50,514 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-30 04:12:50,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 460 flow [2023-08-30 04:12:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:12:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:12:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1138 transitions. [2023-08-30 04:12:50,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49912280701754386 [2023-08-30 04:12:50,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1138 transitions. [2023-08-30 04:12:50,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1138 transitions. [2023-08-30 04:12:50,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:50,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1138 transitions. [2023-08-30 04:12:50,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.66666666666666) internal successors, (1138), 6 states have internal predecessors, (1138), 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 04:12:50,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 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 04:12:50,525 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 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 04:12:50,525 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 365 flow. Second operand 6 states and 1138 transitions. [2023-08-30 04:12:50,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 460 flow [2023-08-30 04:12:50,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 446 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 04:12:50,539 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 142 flow [2023-08-30 04:12:50,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-30 04:12:50,539 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -28 predicate places. [2023-08-30 04:12:50,539 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 142 flow [2023-08-30 04:12:50,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 177.33333333333334) internal successors, (1596), 9 states have internal predecessors, (1596), 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 04:12:50,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:50,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:12:50,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:12:50,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 04:12:50,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-30 04:12:50,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash -106441101, now seen corresponding path program 1 times [2023-08-30 04:12:50,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:50,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659646389] [2023-08-30 04:12:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:50,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:50,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:12:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:50,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:12:50,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:12:50,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2023-08-30 04:12:50,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2023-08-30 04:12:50,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2023-08-30 04:12:50,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2023-08-30 04:12:50,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2023-08-30 04:12:50,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2023-08-30 04:12:50,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2023-08-30 04:12:50,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2023-08-30 04:12:50,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2023-08-30 04:12:50,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2023-08-30 04:12:50,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2023-08-30 04:12:50,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:12:50,777 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:12:50,778 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:12:50,778 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:12:50,806 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:12:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,880 INFO L130 PetriNetUnfolder]: 81/669 cut-off events. [2023-08-30 04:12:50,880 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:50,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 669 events. 81/669 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2969 event pairs, 6 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 452. Up to 32 conditions per place. [2023-08-30 04:12:50,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,897 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:50,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 252 transitions, 548 flow [2023-08-30 04:12:50,965 INFO L130 PetriNetUnfolder]: 81/669 cut-off events. [2023-08-30 04:12:50,965 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:50,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 669 events. 81/669 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2969 event pairs, 6 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 452. Up to 32 conditions per place. [2023-08-30 04:12:50,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 36960 [2023-08-30 04:12:54,639 INFO L134 LiptonReduction]: Checked pairs total: 110148 [2023-08-30 04:12:54,640 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-30 04:12:54,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:54,641 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;@46766f77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:54,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-30 04:12:54,643 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:12:54,643 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:54,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:54,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:54,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 04:12:54,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash 56467, now seen corresponding path program 1 times [2023-08-30 04:12:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:54,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937634882] [2023-08-30 04:12:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:54,702 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 04:12:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937634882] [2023-08-30 04:12:54,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937634882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:54,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:54,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632878478] [2023-08-30 04:12:54,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:54,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:54,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:54,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 458 [2023-08-30 04:12:54,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 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 04:12:54,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:54,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 458 [2023-08-30 04:12:54,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand