./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/weaver/chl-nzb-file-trans.wvr.c -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 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:46:14,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:46:14,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:46:14,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:46:14,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:46:14,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:46:14,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:46:14,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:46:14,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:46:14,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:46:14,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:46:14,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:46:14,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:46:14,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:46:14,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:46:14,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:46:14,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:46:14,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:46:14,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:46:14,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:46:14,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:46:14,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:46:14,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:46:14,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:46:14,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:46:14,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:46:14,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:46:14,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:46:14,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:46:14,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:46:14,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:46:14,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:46:14,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:46:14,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:46:14,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:46:14,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:46:14,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:46:14,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:46:14,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:46:14,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:46:14,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:46:14,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:46:14,229 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:46:14,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:46:14,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:46:14,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:46:14,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:46:14,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:46:14,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:46:14,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:46:14,232 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:46:14,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:46:14,233 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:46:14,233 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:46:14,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:46:14,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:46:14,235 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:46:14,235 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:46:14,235 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:46:14,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:46:14,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:46:14,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:46:14,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:46:14,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:46:14,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:46:14,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:46:14,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:46:14,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:46:14,237 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:46:14,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:46:14,237 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:46:14,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 586b4acd2b590d05e6c872ab286b63f1e9a66197df0a80de4a917f3d7db6c786 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:46:14,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:46:14,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:46:14,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:46:14,493 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:46:14,493 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:46:14,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-09-01 01:46:15,542 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:46:15,766 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:46:15,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c [2023-09-01 01:46:15,784 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ac374ed/a1833e92cc164ddea2a6399da24c53f7/FLAGd1df0ff78 [2023-09-01 01:46:15,795 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ac374ed/a1833e92cc164ddea2a6399da24c53f7 [2023-09-01 01:46:15,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:46:15,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:46:15,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:46:15,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:46:15,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:46:15,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:46:15" (1/1) ... [2023-09-01 01:46:15,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421728f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:15, skipping insertion in model container [2023-09-01 01:46:15,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:46:15" (1/1) ... [2023-09-01 01:46:15,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:46:15,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:46:16,004 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-09-01 01:46:16,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:46:16,022 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:46:16,056 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-trans.wvr.c[6450,6463] [2023-09-01 01:46:16,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:46:16,079 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:46:16,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16 WrapperNode [2023-09-01 01:46:16,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:46:16,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:46:16,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:46:16,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:46:16,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,154 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 601 [2023-09-01 01:46:16,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:46:16,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:46:16,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:46:16,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:46:16,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:46:16,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:46:16,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:46:16,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:46:16,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (1/1) ... [2023-09-01 01:46:16,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:46:16,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:16,235 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) [2023-09-01 01:46:16,249 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 [2023-09-01 01:46:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:46:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:46:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:46:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:46:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 01:46:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:46:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:46:16,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:46:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:46:16,273 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:46:16,372 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:46:16,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:46:17,095 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:46:17,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:46:17,113 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 01:46:17,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:46:17 BoogieIcfgContainer [2023-09-01 01:46:17,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:46:17,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:46:17,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:46:17,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:46:17,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:46:15" (1/3) ... [2023-09-01 01:46:17,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae6d061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:46:17, skipping insertion in model container [2023-09-01 01:46:17,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:46:16" (2/3) ... [2023-09-01 01:46:17,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae6d061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:46:17, skipping insertion in model container [2023-09-01 01:46:17,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:46:17" (3/3) ... [2023-09-01 01:46:17,121 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2023-09-01 01:46:17,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:46:17,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-09-01 01:46:17,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:46:17,261 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 01:46:17,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 724 places, 787 transitions, 1598 flow [2023-09-01 01:46:17,496 INFO L130 PetriNetUnfolder]: 73/784 cut-off events. [2023-09-01 01:46:17,497 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:46:17,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 784 events. 73/784 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2897 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-09-01 01:46:17,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 724 places, 787 transitions, 1598 flow [2023-09-01 01:46:17,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 717 places, 780 transitions, 1578 flow [2023-09-01 01:46:17,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:46:17,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 717 places, 780 transitions, 1578 flow [2023-09-01 01:46:17,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 717 places, 780 transitions, 1578 flow [2023-09-01 01:46:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 717 places, 780 transitions, 1578 flow [2023-09-01 01:46:17,706 INFO L130 PetriNetUnfolder]: 73/780 cut-off events. [2023-09-01 01:46:17,707 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 01:46:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 780 events. 73/780 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2894 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 577. Up to 2 conditions per place. [2023-09-01 01:46:17,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 196080 [2023-09-01 01:46:49,822 INFO L134 LiptonReduction]: Checked pairs total: 220167 [2023-09-01 01:46:49,822 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-09-01 01:46:49,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:46:49,859 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;@273aa6d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:46:49,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2023-09-01 01:46:49,866 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:46:49,866 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:46:49,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:49,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:46:49,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:49,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash 111115, now seen corresponding path program 1 times [2023-09-01 01:46:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022968521] [2023-09-01 01:46:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:50,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:50,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022968521] [2023-09-01 01:46:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022968521] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:50,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:50,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:46:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64611657] [2023-09-01 01:46:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:46:50,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:46:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:46:50,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 722 out of 1845 [2023-09-01 01:46:50,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 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) [2023-09-01 01:46:50,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:50,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 722 of 1845 [2023-09-01 01:46:50,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:58,642 INFO L130 PetriNetUnfolder]: 71352/95312 cut-off events. [2023-09-01 01:46:58,643 INFO L131 PetriNetUnfolder]: For 1188/1188 co-relation queries the response was YES. [2023-09-01 01:46:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192063 conditions, 95312 events. 71352/95312 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 4078. Compared 579561 event pairs, 58845 based on Foata normal form. 0/29264 useless extension candidates. Maximal degree in co-relation 185500. Up to 95307 conditions per place. [2023-09-01 01:46:59,087 INFO L137 encePairwiseOnDemand]: 1818/1845 looper letters, 101 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2023-09-01 01:46:59,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 107 transitions, 446 flow [2023-09-01 01:46:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2296 transitions. [2023-09-01 01:46:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-09-01 01:46:59,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2296 transitions. [2023-09-01 01:46:59,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2296 transitions. [2023-09-01 01:46:59,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:59,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2296 transitions. [2023-09-01 01:46:59,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 765.3333333333334) internal successors, (2296), 3 states have internal predecessors, (2296), 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) [2023-09-01 01:46:59,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:46:59,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:46:59,135 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 250 flow. Second operand 3 states and 2296 transitions. [2023-09-01 01:46:59,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 107 transitions, 446 flow [2023-09-01 01:46:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 01:46:59,189 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 250 flow [2023-09-01 01:46:59,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-09-01 01:46:59,193 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -18 predicate places. [2023-09-01 01:46:59,193 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 250 flow [2023-09-01 01:46:59,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 722.6666666666666) internal successors, (2168), 3 states have internal predecessors, (2168), 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) [2023-09-01 01:46:59,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:59,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:46:59,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 01:46:59,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:46:59,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash 111114, now seen corresponding path program 1 times [2023-09-01 01:46:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59967660] [2023-09-01 01:46:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:59,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:59,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59967660] [2023-09-01 01:46:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59967660] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:59,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:46:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026928670] [2023-09-01 01:46:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:59,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:46:59,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:46:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:46:59,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 1845 [2023-09-01 01:46:59,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 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) [2023-09-01 01:46:59,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:59,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 1845 [2023-09-01 01:46:59,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:07,052 INFO L130 PetriNetUnfolder]: 71352/95306 cut-off events. [2023-09-01 01:47:07,052 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 01:47:07,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191229 conditions, 95306 events. 71352/95306 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4042. Compared 579057 event pairs, 58845 based on Foata normal form. 6/29272 useless extension candidates. Maximal degree in co-relation 191192. Up to 95306 conditions per place. [2023-09-01 01:47:07,403 INFO L137 encePairwiseOnDemand]: 1841/1845 looper letters, 100 selfloop transitions, 1 changer transitions 0/101 dead transitions. [2023-09-01 01:47:07,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 446 flow [2023-09-01 01:47:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2285 transitions. [2023-09-01 01:47:07,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128274616079494 [2023-09-01 01:47:07,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2285 transitions. [2023-09-01 01:47:07,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2285 transitions. [2023-09-01 01:47:07,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:07,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2285 transitions. [2023-09-01 01:47:07,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 761.6666666666666) internal successors, (2285), 3 states have internal predecessors, (2285), 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) [2023-09-01 01:47:07,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:47:07,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:47:07,422 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 250 flow. Second operand 3 states and 2285 transitions. [2023-09-01 01:47:07,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 446 flow [2023-09-01 01:47:07,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:07,424 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 240 flow [2023-09-01 01:47:07,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-09-01 01:47:07,425 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-09-01 01:47:07,425 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 240 flow [2023-09-01 01:47:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 728.6666666666666) internal successors, (2186), 3 states have internal predecessors, (2186), 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) [2023-09-01 01:47:07,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:07,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:47:07,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 01:47:07,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:07,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 3450404, now seen corresponding path program 1 times [2023-09-01 01:47:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285991256] [2023-09-01 01:47:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285991256] [2023-09-01 01:47:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285991256] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609447388] [2023-09-01 01:47:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:07,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:07,534 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) [2023-09-01 01:47:07,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 01:47:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:47:07,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:07,748 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:47:07,749 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:47:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:07,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609447388] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:07,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:47:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-09-01 01:47:07,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512969663] [2023-09-01 01:47:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:07,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:47:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:47:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:47:08,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 713 out of 1845 [2023-09-01 01:47:08,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 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) [2023-09-01 01:47:08,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:08,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 713 of 1845 [2023-09-01 01:47:08,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:32,140 INFO L130 PetriNetUnfolder]: 214054/285907 cut-off events. [2023-09-01 01:47:32,140 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2023-09-01 01:47:32,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573638 conditions, 285907 events. 214054/285907 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959339 event pairs, 176535 based on Foata normal form. 0/87787 useless extension candidates. Maximal degree in co-relation 573630. Up to 95304 conditions per place. [2023-09-01 01:47:33,194 INFO L137 encePairwiseOnDemand]: 1833/1845 looper letters, 273 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2023-09-01 01:47:33,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 292 transitions, 1256 flow [2023-09-01 01:47:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:47:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:47:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4584 transitions. [2023-09-01 01:47:33,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140921409214092 [2023-09-01 01:47:33,203 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4584 transitions. [2023-09-01 01:47:33,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4584 transitions. [2023-09-01 01:47:33,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:33,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4584 transitions. [2023-09-01 01:47:33,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 764.0) internal successors, (4584), 6 states have internal predecessors, (4584), 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) [2023-09-01 01:47:33,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 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) [2023-09-01 01:47:33,224 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1845.0) internal successors, (12915), 7 states have internal predecessors, (12915), 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) [2023-09-01 01:47:33,224 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 240 flow. Second operand 6 states and 4584 transitions. [2023-09-01 01:47:33,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 292 transitions, 1256 flow [2023-09-01 01:47:33,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 292 transitions, 1255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:33,228 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 381 flow [2023-09-01 01:47:33,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-09-01 01:47:33,229 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:47:33,229 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 381 flow [2023-09-01 01:47:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 714.125) internal successors, (5713), 8 states have internal predecessors, (5713), 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) [2023-09-01 01:47:33,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:33,231 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:47:33,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 01:47:33,436 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 [2023-09-01 01:47:33,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:47:33,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash -282431413, now seen corresponding path program 2 times [2023-09-01 01:47:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721015385] [2023-09-01 01:47:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:33,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:33,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721015385] [2023-09-01 01:47:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721015385] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670981360] [2023-09-01 01:47:33,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:47:33,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:33,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:33,659 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) [2023-09-01 01:47:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 01:47:33,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:47:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:47:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:47:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:33,821 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-09-01 01:47:33,821 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 3 case distinctions, treesize of input 15 treesize of output 42 [2023-09-01 01:47:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:47:33,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:47:33,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670981360] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:33,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:47:33,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-09-01 01:47:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126839071] [2023-09-01 01:47:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:33,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:47:33,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:33,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:47:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:47:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-09-01 01:47:34,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 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) [2023-09-01 01:47:34,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:34,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-09-01 01:47:34,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:58,362 INFO L130 PetriNetUnfolder]: 214054/285904 cut-off events. [2023-09-01 01:47:58,363 INFO L131 PetriNetUnfolder]: For 570/570 co-relation queries the response was YES. [2023-09-01 01:47:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573676 conditions, 285904 events. 214054/285904 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 11377. Compared 1959645 event pairs, 176535 based on Foata normal form. 3/87795 useless extension candidates. Maximal degree in co-relation 573664. Up to 95300 conditions per place. [2023-09-01 01:47:59,814 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 270 selfloop transitions, 19 changer transitions 0/289 dead transitions. [2023-09-01 01:47:59,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 289 transitions, 1321 flow [2023-09-01 01:47:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:47:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:47:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5367 transitions. [2023-09-01 01:47:59,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41556329849012774 [2023-09-01 01:47:59,832 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5367 transitions. [2023-09-01 01:47:59,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5367 transitions. [2023-09-01 01:47:59,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:59,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5367 transitions. [2023-09-01 01:47:59,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 766.7142857142857) internal successors, (5367), 7 states have internal predecessors, (5367), 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) [2023-09-01 01:47:59,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 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) [2023-09-01 01:47:59,857 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 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) [2023-09-01 01:47:59,858 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 381 flow. Second operand 7 states and 5367 transitions. [2023-09-01 01:47:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 289 transitions, 1321 flow [2023-09-01 01:47:59,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 289 transitions, 1289 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 01:47:59,863 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 357 flow [2023-09-01 01:47:59,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2023-09-01 01:47:59,865 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:47:59,865 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 357 flow [2023-09-01 01:47:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 725.8571428571429) internal successors, (5081), 7 states have internal predecessors, (5081), 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) [2023-09-01 01:47:59,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:59,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-09-01 01:47:59,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 01:48:00,070 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,SelfDestructingSolverStorable3 [2023-09-01 01:48:00,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:00,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1912003009, now seen corresponding path program 1 times [2023-09-01 01:48:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:00,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583203401] [2023-09-01 01:48:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:48:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:00,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583203401] [2023-09-01 01:48:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583203401] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:48:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571976567] [2023-09-01 01:48:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:00,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:48:00,165 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) [2023-09-01 01:48:00,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:48:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:00,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:48:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:48:00,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:48:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 01:48:00,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571976567] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:48:00,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:48:00,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-09-01 01:48:00,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039828769] [2023-09-01 01:48:00,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:48:00,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:48:00,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:48:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:48:00,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 725 out of 1845 [2023-09-01 01:48:00,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 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) [2023-09-01 01:48:00,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:00,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 725 of 1845 [2023-09-01 01:48:00,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:08,405 INFO L130 PetriNetUnfolder]: 71352/95315 cut-off events. [2023-09-01 01:48:08,405 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2023-09-01 01:48:08,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191292 conditions, 95315 events. 71352/95315 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 578795 event pairs, 58845 based on Foata normal form. 5/29284 useless extension candidates. Maximal degree in co-relation 191281. Up to 95301 conditions per place. [2023-09-01 01:48:08,765 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 92 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-09-01 01:48:08,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 567 flow [2023-09-01 01:48:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:48:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:48:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 5200 transitions. [2023-09-01 01:48:08,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40263259775454896 [2023-09-01 01:48:08,772 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 5200 transitions. [2023-09-01 01:48:08,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 5200 transitions. [2023-09-01 01:48:08,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:08,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 5200 transitions. [2023-09-01 01:48:08,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 742.8571428571429) internal successors, (5200), 7 states have internal predecessors, (5200), 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) [2023-09-01 01:48:08,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 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) [2023-09-01 01:48:08,789 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1845.0) internal successors, (14760), 8 states have internal predecessors, (14760), 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) [2023-09-01 01:48:08,789 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 357 flow. Second operand 7 states and 5200 transitions. [2023-09-01 01:48:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 567 flow [2023-09-01 01:48:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 530 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 01:48:08,791 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 388 flow [2023-09-01 01:48:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-09-01 01:48:08,792 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -9 predicate places. [2023-09-01 01:48:08,792 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 388 flow [2023-09-01 01:48:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 726.4545454545455) internal successors, (7991), 11 states have internal predecessors, (7991), 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) [2023-09-01 01:48:08,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:08,794 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:48:08,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:08,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:08,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:08,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash -359831731, now seen corresponding path program 2 times [2023-09-01 01:48:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:08,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727399866] [2023-09-01 01:48:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:48:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727399866] [2023-09-01 01:48:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727399866] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:09,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:09,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:48:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998094752] [2023-09-01 01:48:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:48:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:48:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:48:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 1845 [2023-09-01 01:48:09,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 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) [2023-09-01 01:48:09,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:09,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 1845 [2023-09-01 01:48:09,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:16,213 INFO L130 PetriNetUnfolder]: 54076/72890 cut-off events. [2023-09-01 01:48:16,213 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2023-09-01 01:48:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146461 conditions, 72890 events. 54076/72890 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 3107. Compared 438501 event pairs, 44405 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 146447. Up to 72890 conditions per place. [2023-09-01 01:48:16,597 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 107 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-09-01 01:48:16,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 108 transitions, 590 flow [2023-09-01 01:48:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:48:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:48:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2282 transitions. [2023-09-01 01:48:16,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122854561878952 [2023-09-01 01:48:16,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2282 transitions. [2023-09-01 01:48:16,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2282 transitions. [2023-09-01 01:48:16,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:16,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2282 transitions. [2023-09-01 01:48:16,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 760.6666666666666) internal successors, (2282), 3 states have internal predecessors, (2282), 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) [2023-09-01 01:48:16,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:16,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:16,612 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 388 flow. Second operand 3 states and 2282 transitions. [2023-09-01 01:48:16,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 108 transitions, 590 flow [2023-09-01 01:48:16,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 554 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 01:48:16,616 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 340 flow [2023-09-01 01:48:16,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2023-09-01 01:48:16,618 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -13 predicate places. [2023-09-01 01:48:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 340 flow [2023-09-01 01:48:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 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) [2023-09-01 01:48:16,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:16,619 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-09-01 01:48:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 01:48:16,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:16,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash -359831729, now seen corresponding path program 1 times [2023-09-01 01:48:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:16,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592337387] [2023-09-01 01:48:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:48:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:16,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592337387] [2023-09-01 01:48:16,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592337387] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:16,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:48:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609155434] [2023-09-01 01:48:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:16,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:48:16,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:48:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:48:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-09-01 01:48:17,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 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) [2023-09-01 01:48:17,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:17,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-09-01 01:48:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:21,862 INFO L130 PetriNetUnfolder]: 36800/50465 cut-off events. [2023-09-01 01:48:21,863 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:48:21,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101590 conditions, 50465 events. 36800/50465 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2226. Compared 303387 event pairs, 29965 based on Foata normal form. 0/19215 useless extension candidates. Maximal degree in co-relation 101575. Up to 50465 conditions per place. [2023-09-01 01:48:22,089 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 105 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-09-01 01:48:22,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 538 flow [2023-09-01 01:48:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:48:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:48:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2256 transitions. [2023-09-01 01:48:22,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075880758807588 [2023-09-01 01:48:22,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2256 transitions. [2023-09-01 01:48:22,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2256 transitions. [2023-09-01 01:48:22,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:22,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2256 transitions. [2023-09-01 01:48:22,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 752.0) internal successors, (2256), 3 states have internal predecessors, (2256), 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) [2023-09-01 01:48:22,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:22,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:22,132 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 340 flow. Second operand 3 states and 2256 transitions. [2023-09-01 01:48:22,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 538 flow [2023-09-01 01:48:22,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 537 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:48:22,135 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 327 flow [2023-09-01 01:48:22,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-09-01 01:48:22,136 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-09-01 01:48:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 327 flow [2023-09-01 01:48:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.3333333333334) internal successors, (4334), 6 states have internal predecessors, (4334), 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) [2023-09-01 01:48:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:22,141 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:22,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 01:48:22,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:22,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135794, now seen corresponding path program 1 times [2023-09-01 01:48:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:22,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898263156] [2023-09-01 01:48:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:22,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:48:22,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898263156] [2023-09-01 01:48:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898263156] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:48:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782618837] [2023-09-01 01:48:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:22,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 01:48:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 01:48:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 01:48:22,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 721 out of 1845 [2023-09-01 01:48:22,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 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) [2023-09-01 01:48:22,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:22,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 721 of 1845 [2023-09-01 01:48:22,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:27,016 INFO L130 PetriNetUnfolder]: 36246/49655 cut-off events. [2023-09-01 01:48:27,016 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:48:27,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 49655 events. 36246/49655 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2178. Compared 296219 event pairs, 29511 based on Foata normal form. 0/19073 useless extension candidates. Maximal degree in co-relation 99955. Up to 49655 conditions per place. [2023-09-01 01:48:27,256 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 103 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-09-01 01:48:27,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 531 flow [2023-09-01 01:48:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:48:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:48:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2254 transitions. [2023-09-01 01:48:27,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40722673893405603 [2023-09-01 01:48:27,260 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2254 transitions. [2023-09-01 01:48:27,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2254 transitions. [2023-09-01 01:48:27,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:27,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2254 transitions. [2023-09-01 01:48:27,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 751.3333333333334) internal successors, (2254), 3 states have internal predecessors, (2254), 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) [2023-09-01 01:48:27,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:27,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:27,267 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 327 flow. Second operand 3 states and 2254 transitions. [2023-09-01 01:48:27,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 531 flow [2023-09-01 01:48:27,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:48:27,269 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 324 flow [2023-09-01 01:48:27,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-09-01 01:48:27,269 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -15 predicate places. [2023-09-01 01:48:27,269 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 324 flow [2023-09-01 01:48:27,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 722.6666666666666) internal successors, (4336), 6 states have internal predecessors, (4336), 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) [2023-09-01 01:48:27,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:27,270 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 01:48:27,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:27,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2094135793, now seen corresponding path program 1 times [2023-09-01 01:48:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:27,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664586321] [2023-09-01 01:48:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:48:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664586321] [2023-09-01 01:48:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664586321] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:48:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059073164] [2023-09-01 01:48:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:48:27,592 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) [2023-09-01 01:48:27,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:48:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:48:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:27,792 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2023-09-01 01:48:27,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2023-09-01 01:48:27,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-09-01 01:48:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:27,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:48:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:48:27,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:48:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 01:48:27,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:48:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059073164] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:27,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:48:27,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-09-01 01:48:27,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726272020] [2023-09-01 01:48:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:27,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:48:27,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:48:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:48:28,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 735 out of 1845 [2023-09-01 01:48:28,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 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) [2023-09-01 01:48:28,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:28,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 735 of 1845 [2023-09-01 01:48:28,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:32,412 INFO L130 PetriNetUnfolder]: 35692/48845 cut-off events. [2023-09-01 01:48:32,413 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:48:32,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98352 conditions, 48845 events. 35692/48845 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 291352 event pairs, 29057 based on Foata normal form. 0/18931 useless extension candidates. Maximal degree in co-relation 98335. Up to 48845 conditions per place. [2023-09-01 01:48:32,626 INFO L137 encePairwiseOnDemand]: 1842/1845 looper letters, 101 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 01:48:32,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 524 flow [2023-09-01 01:48:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:48:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:48:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2294 transitions. [2023-09-01 01:48:32,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445347786811204 [2023-09-01 01:48:32,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2294 transitions. [2023-09-01 01:48:32,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2294 transitions. [2023-09-01 01:48:32,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:32,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2294 transitions. [2023-09-01 01:48:32,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 764.6666666666666) internal successors, (2294), 3 states have internal predecessors, (2294), 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) [2023-09-01 01:48:32,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:32,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1845.0) internal successors, (7380), 4 states have internal predecessors, (7380), 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) [2023-09-01 01:48:32,636 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 324 flow. Second operand 3 states and 2294 transitions. [2023-09-01 01:48:32,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 524 flow [2023-09-01 01:48:32,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:48:32,638 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 321 flow [2023-09-01 01:48:32,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-09-01 01:48:32,639 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -16 predicate places. [2023-09-01 01:48:32,639 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 321 flow [2023-09-01 01:48:32,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 737.25) internal successors, (2949), 4 states have internal predecessors, (2949), 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) [2023-09-01 01:48:32,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:32,639 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:32,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:32,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:32,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 493713100, now seen corresponding path program 1 times [2023-09-01 01:48:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246762937] [2023-09-01 01:48:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:48:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246762937] [2023-09-01 01:48:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246762937] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:48:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936420067] [2023-09-01 01:48:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:33,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:48:33,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:48:33,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 01:48:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 01:48:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:48:33,294 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 [2023-09-01 01:48:33,399 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:48:33,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:48:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:48:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:48:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:48:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936420067] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:48:33,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:48:33,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-09-01 01:48:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966385071] [2023-09-01 01:48:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:33,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:48:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:48:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-09-01 01:48:34,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 1845 [2023-09-01 01:48:34,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 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) [2023-09-01 01:48:34,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:34,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 1845 [2023-09-01 01:48:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:43,038 INFO L130 PetriNetUnfolder]: 64726/88717 cut-off events. [2023-09-01 01:48:43,038 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-09-01 01:48:43,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178583 conditions, 88717 events. 64726/88717 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 565802 event pairs, 29057 based on Foata normal form. 0/34905 useless extension candidates. Maximal degree in co-relation 178565. Up to 48257 conditions per place. [2023-09-01 01:48:43,469 INFO L137 encePairwiseOnDemand]: 1837/1845 looper letters, 171 selfloop transitions, 5 changer transitions 0/176 dead transitions. [2023-09-01 01:48:43,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 826 flow [2023-09-01 01:48:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:48:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:48:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3704 transitions. [2023-09-01 01:48:43,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40151761517615175 [2023-09-01 01:48:43,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3704 transitions. [2023-09-01 01:48:43,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3704 transitions. [2023-09-01 01:48:43,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:43,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3704 transitions. [2023-09-01 01:48:43,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 740.8) internal successors, (3704), 5 states have internal predecessors, (3704), 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) [2023-09-01 01:48:43,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 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) [2023-09-01 01:48:43,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1845.0) internal successors, (11070), 6 states have internal predecessors, (11070), 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) [2023-09-01 01:48:43,483 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 321 flow. Second operand 5 states and 3704 transitions. [2023-09-01 01:48:43,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 826 flow [2023-09-01 01:48:43,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 176 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:48:43,486 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 351 flow [2023-09-01 01:48:43,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2023-09-01 01:48:43,487 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -11 predicate places. [2023-09-01 01:48:43,487 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 351 flow [2023-09-01 01:48:43,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 709.4) internal successors, (7094), 10 states have internal predecessors, (7094), 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) [2023-09-01 01:48:43,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:43,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:43,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:48:43,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 01:48:43,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:43,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash 493713097, now seen corresponding path program 1 times [2023-09-01 01:48:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253264806] [2023-09-01 01:48:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-09-01 01:48:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:43,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253264806] [2023-09-01 01:48:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253264806] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:43,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:48:43,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119973625] [2023-09-01 01:48:43,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:43,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:48:43,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:43,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:48:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:48:44,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-09-01 01:48:44,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 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) [2023-09-01 01:48:44,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:44,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-09-01 01:48:44,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:50,625 INFO L130 PetriNetUnfolder]: 50526/69193 cut-off events. [2023-09-01 01:48:50,626 INFO L131 PetriNetUnfolder]: For 3475/3475 co-relation queries the response was YES. [2023-09-01 01:48:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145119 conditions, 69193 events. 50526/69193 cut-off events. For 3475/3475 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 425158 event pairs, 41115 based on Foata normal form. 0/30929 useless extension candidates. Maximal degree in co-relation 145098. Up to 69186 conditions per place. [2023-09-01 01:48:51,017 INFO L137 encePairwiseOnDemand]: 1839/1845 looper letters, 98 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-09-01 01:48:51,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 543 flow [2023-09-01 01:48:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:48:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:48:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2927 transitions. [2023-09-01 01:48:51,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966124661246612 [2023-09-01 01:48:51,021 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2927 transitions. [2023-09-01 01:48:51,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2927 transitions. [2023-09-01 01:48:51,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:51,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2927 transitions. [2023-09-01 01:48:51,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 731.75) internal successors, (2927), 4 states have internal predecessors, (2927), 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) [2023-09-01 01:48:51,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 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) [2023-09-01 01:48:51,028 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 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) [2023-09-01 01:48:51,028 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 351 flow. Second operand 4 states and 2927 transitions. [2023-09-01 01:48:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 543 flow [2023-09-01 01:48:51,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 100 transitions, 540 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:48:51,032 INFO L231 Difference]: Finished difference. Result has 99 places, 100 transitions, 344 flow [2023-09-01 01:48:51,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2023-09-01 01:48:51,033 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -14 predicate places. [2023-09-01 01:48:51,033 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 344 flow [2023-09-01 01:48:51,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 712.4) internal successors, (3562), 5 states have internal predecessors, (3562), 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) [2023-09-01 01:48:51,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:51,033 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:51,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 01:48:51,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:51,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 493713099, now seen corresponding path program 1 times [2023-09-01 01:48:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:51,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004753339] [2023-09-01 01:48:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:51,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:48:51,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004753339] [2023-09-01 01:48:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004753339] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:48:51,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:48:51,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:48:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832684288] [2023-09-01 01:48:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:48:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:48:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:48:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:48:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:48:51,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1845 [2023-09-01 01:48:51,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 712.2) internal successors, (3561), 5 states have internal predecessors, (3561), 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) [2023-09-01 01:48:51,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:48:51,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1845 [2023-09-01 01:48:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:48:56,197 INFO L130 PetriNetUnfolder]: 36122/49289 cut-off events. [2023-09-01 01:48:56,197 INFO L131 PetriNetUnfolder]: For 2942/2942 co-relation queries the response was YES. [2023-09-01 01:48:56,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104158 conditions, 49289 events. 36122/49289 cut-off events. For 2942/2942 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 285720 event pairs, 28735 based on Foata normal form. 0/24245 useless extension candidates. Maximal degree in co-relation 104137. Up to 49275 conditions per place. [2023-09-01 01:48:56,459 INFO L137 encePairwiseOnDemand]: 1836/1845 looper letters, 91 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-09-01 01:48:56,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 516 flow [2023-09-01 01:48:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:48:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:48:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2923 transitions. [2023-09-01 01:48:56,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39607046070460705 [2023-09-01 01:48:56,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2923 transitions. [2023-09-01 01:48:56,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2923 transitions. [2023-09-01 01:48:56,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:48:56,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2923 transitions. [2023-09-01 01:48:56,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 730.75) internal successors, (2923), 4 states have internal predecessors, (2923), 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) [2023-09-01 01:48:56,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 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) [2023-09-01 01:48:56,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1845.0) internal successors, (9225), 5 states have internal predecessors, (9225), 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) [2023-09-01 01:48:56,470 INFO L175 Difference]: Start difference. First operand has 99 places, 100 transitions, 344 flow. Second operand 4 states and 2923 transitions. [2023-09-01 01:48:56,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 516 flow [2023-09-01 01:48:56,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:48:56,474 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 331 flow [2023-09-01 01:48:56,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1845, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2023-09-01 01:48:56,474 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -20 predicate places. [2023-09-01 01:48:56,475 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 331 flow [2023-09-01 01:48:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 712.2) internal successors, (3561), 5 states have internal predecessors, (3561), 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) [2023-09-01 01:48:56,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:48:56,475 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:48:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 01:48:56,476 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2023-09-01 01:48:56,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:48:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 493713098, now seen corresponding path program 1 times [2023-09-01 01:48:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:48:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267579804] [2023-09-01 01:48:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:48:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:48:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:48:57,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:48:57,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267579804] [2023-09-01 01:48:57,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267579804] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:48:57,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939660471] [2023-09-01 01:48:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:48:57,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:48:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:48:57,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:48:57,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process