./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.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/parallel-barrier-loop.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 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c --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 02:12:23,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:12:23,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:12:23,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:12:23,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:12:23,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:12:23,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:12:23,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:12:23,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:12:23,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:12:23,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:12:23,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:12:23,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:12:23,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:12:23,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:12:23,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:12:23,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:12:23,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:12:23,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:12:23,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:12:23,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:12:23,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:12:23,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:12:23,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:12:23,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:12:23,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:12:23,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:12:23,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:12:23,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:12:23,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:12:23,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:12:23,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:12:23,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:12:23,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:12:23,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:12:23,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:12:23,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:12:23,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:12:23,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:12:23,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:12:23,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:12:23,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:12:23,238 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:12:23,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:12:23,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:12:23,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:12:23,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:12:23,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:12:23,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:12:23,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:12:23,242 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:12:23,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:12:23,243 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:12:23,243 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:12:23,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:12:23,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:12:23,246 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:12:23,246 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:12:23,249 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:12:23,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:12:23,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:12:23,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:12:23,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:12:23,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:12:23,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:12:23,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:12:23,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:12:23,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:12:23,253 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:12:23,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:12:23,254 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:12:23,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:12:23,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:12:23,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:12:23,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:12:23,582 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:12:23,583 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:12:23,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-09-01 02:12:24,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:12:25,088 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:12:25,092 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-09-01 02:12:25,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0540f0d9/86d49ee4a8fb4c1fa18e0ce6dfc3dfd7/FLAGb27811698 [2023-09-01 02:12:25,109 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0540f0d9/86d49ee4a8fb4c1fa18e0ce6dfc3dfd7 [2023-09-01 02:12:25,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:12:25,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:12:25,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:12:25,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:12:25,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:12:25,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c5d3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25, skipping insertion in model container [2023-09-01 02:12:25,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:12:25,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:12:25,279 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/parallel-barrier-loop.wvr.c[5938,5951] [2023-09-01 02:12:25,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:12:25,292 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:12:25,320 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/parallel-barrier-loop.wvr.c[5938,5951] [2023-09-01 02:12:25,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:12:25,329 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:12:25,353 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:12:25,371 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:12:25,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25 WrapperNode [2023-09-01 02:12:25,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:12:25,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:12:25,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:12:25,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:12:25,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,409 INFO L138 Inliner]: procedures = 25, calls = 120, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 268 [2023-09-01 02:12:25,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:12:25,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:12:25,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:12:25,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:12:25,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:12:25,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:12:25,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:12:25,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:12:25,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (1/1) ... [2023-09-01 02:12:25,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:12:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:12:25,492 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 02:12:25,501 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 02:12:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:12:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:12:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:12:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:12:25,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:12:25,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:12:25,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:12:25,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:12:25,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:12:25,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:12:25,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:12:25,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:12:25,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:12:25,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:12:25,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:12:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:12:25,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:12:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:12:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:12:25,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:12:25,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:12:25,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:12:25,534 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 02:12:25,631 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:12:25,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:12:26,118 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:12:26,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:12:26,251 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 02:12:26,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:12:26 BoogieIcfgContainer [2023-09-01 02:12:26,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:12:26,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:12:26,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:12:26,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:12:26,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:12:25" (1/3) ... [2023-09-01 02:12:26,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:12:26, skipping insertion in model container [2023-09-01 02:12:26,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:12:25" (2/3) ... [2023-09-01 02:12:26,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:12:26, skipping insertion in model container [2023-09-01 02:12:26,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:12:26" (3/3) ... [2023-09-01 02:12:26,268 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-09-01 02:12:26,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:12:26,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 02:12:26,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:12:26,396 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-09-01 02:12:26,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 297 transitions, 666 flow [2023-09-01 02:12:26,582 INFO L130 PetriNetUnfolder]: 14/265 cut-off events. [2023-09-01 02:12:26,587 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:12:26,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 265 events. 14/265 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 532 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-09-01 02:12:26,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 297 transitions, 666 flow [2023-09-01 02:12:26,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 261 transitions, 570 flow [2023-09-01 02:12:26,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:12:26,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 261 transitions, 570 flow [2023-09-01 02:12:26,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 261 transitions, 570 flow [2023-09-01 02:12:26,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 261 transitions, 570 flow [2023-09-01 02:12:26,700 INFO L130 PetriNetUnfolder]: 14/261 cut-off events. [2023-09-01 02:12:26,701 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:12:26,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 261 events. 14/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 532 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-09-01 02:12:26,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 15256 [2023-09-01 02:12:30,823 INFO L134 LiptonReduction]: Checked pairs total: 110291 [2023-09-01 02:12:30,823 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-09-01 02:12:30,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:12:30,842 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;@5a9fe1ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:12:30,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-09-01 02:12:30,844 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 02:12:30,844 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:12:30,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:12:30,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:12:30,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:12:30,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:12:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1085, now seen corresponding path program 1 times [2023-09-01 02:12:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:12:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533606391] [2023-09-01 02:12:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:12:30,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:12:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:12:30,931 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 02:12:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:12:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533606391] [2023-09-01 02:12:30,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533606391] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:12:30,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:12:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:12:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357925202] [2023-09-01 02:12:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:12:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:12:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:12:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:12:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:12:30,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 488 [2023-09-01 02:12:30,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 112 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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 02:12:30,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:12:30,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 488 [2023-09-01 02:12:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:12:44,364 INFO L130 PetriNetUnfolder]: 130780/195773 cut-off events. [2023-09-01 02:12:44,364 INFO L131 PetriNetUnfolder]: For 12493/12493 co-relation queries the response was YES. [2023-09-01 02:12:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366620 conditions, 195773 events. 130780/195773 cut-off events. For 12493/12493 co-relation queries the response was YES. Maximal size of possible extension queue 8867. Compared 1693702 event pairs, 104620 based on Foata normal form. 0/123960 useless extension candidates. Maximal degree in co-relation 364112. Up to 157514 conditions per place. [2023-09-01 02:12:45,843 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 55 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2023-09-01 02:12:45,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 109 transitions, 376 flow [2023-09-01 02:12:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:12:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:12:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 578 transitions. [2023-09-01 02:12:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922131147540983 [2023-09-01 02:12:45,857 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 578 transitions. [2023-09-01 02:12:45,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 578 transitions. [2023-09-01 02:12:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:12:45,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 578 transitions. [2023-09-01 02:12:45,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 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 02:12:45,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 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 02:12:45,872 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 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 02:12:45,873 INFO L175 Difference]: Start difference. First operand has 123 places, 112 transitions, 272 flow. Second operand 2 states and 578 transitions. [2023-09-01 02:12:45,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 109 transitions, 376 flow [2023-09-01 02:12:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 344 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 02:12:46,605 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 234 flow [2023-09-01 02:12:46,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-09-01 02:12:46,609 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -14 predicate places. [2023-09-01 02:12:46,610 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 234 flow [2023-09-01 02:12:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 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 02:12:46,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:12:46,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:12:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:12:46,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:12:46,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:12:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1026884479, now seen corresponding path program 1 times [2023-09-01 02:12:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:12:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237060422] [2023-09-01 02:12:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:12:46,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:12:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:12:46,775 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 02:12:46,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:12:46,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237060422] [2023-09-01 02:12:46,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237060422] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:12:46,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:12:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:12:46,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953217578] [2023-09-01 02:12:46,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:12:46,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:12:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:12:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:12:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:12:46,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 488 [2023-09-01 02:12:46,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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 02:12:46,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:12:46,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 488 [2023-09-01 02:12:46,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:12:57,758 INFO L130 PetriNetUnfolder]: 133318/199891 cut-off events. [2023-09-01 02:12:57,759 INFO L131 PetriNetUnfolder]: For 3018/3018 co-relation queries the response was YES. [2023-09-01 02:12:58,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364233 conditions, 199891 events. 133318/199891 cut-off events. For 3018/3018 co-relation queries the response was YES. Maximal size of possible extension queue 8888. Compared 1733286 event pairs, 102147 based on Foata normal form. 0/126642 useless extension candidates. Maximal degree in co-relation 364230. Up to 154128 conditions per place. [2023-09-01 02:12:58,941 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 103 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2023-09-01 02:12:58,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 575 flow [2023-09-01 02:12:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:12:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:12:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-09-01 02:12:58,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744535519125683 [2023-09-01 02:12:58,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-09-01 02:12:58,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-09-01 02:12:58,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:12:58,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-09-01 02:12:58,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 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 02:12:58,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:12:58,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:12:58,954 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 234 flow. Second operand 3 states and 841 transitions. [2023-09-01 02:12:58,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 575 flow [2023-09-01 02:12:58,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 575 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:12:58,962 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 290 flow [2023-09-01 02:12:58,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2023-09-01 02:12:58,963 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -10 predicate places. [2023-09-01 02:12:58,963 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 290 flow [2023-09-01 02:12:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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 02:12:58,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:12:58,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:12:58,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:12:58,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:12:58,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:12:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1026884480, now seen corresponding path program 1 times [2023-09-01 02:12:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:12:58,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392537293] [2023-09-01 02:12:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:12:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:12:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:12:59,167 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 02:12:59,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:12:59,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392537293] [2023-09-01 02:12:59,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392537293] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:12:59,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:12:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:12:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218564673] [2023-09-01 02:12:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:12:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:12:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:12:59,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:12:59,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:12:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 488 [2023-09-01 02:12:59,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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 02:12:59,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:12:59,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 488 [2023-09-01 02:12:59,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:09,815 INFO L130 PetriNetUnfolder]: 132691/199258 cut-off events. [2023-09-01 02:13:09,815 INFO L131 PetriNetUnfolder]: For 6237/6245 co-relation queries the response was YES. [2023-09-01 02:13:10,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365649 conditions, 199258 events. 132691/199258 cut-off events. For 6237/6245 co-relation queries the response was YES. Maximal size of possible extension queue 8886. Compared 1733070 event pairs, 105797 based on Foata normal form. 241/126656 useless extension candidates. Maximal degree in co-relation 365644. Up to 160060 conditions per place. [2023-09-01 02:13:11,194 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 58 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-09-01 02:13:11,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 404 flow [2023-09-01 02:13:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-09-01 02:13:11,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607923497267759 [2023-09-01 02:13:11,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-09-01 02:13:11,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-09-01 02:13:11,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:11,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-09-01 02:13:11,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 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 02:13:11,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:11,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:11,204 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 290 flow. Second operand 3 states and 821 transitions. [2023-09-01 02:13:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 404 flow [2023-09-01 02:13:11,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 113 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:13:11,221 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 274 flow [2023-09-01 02:13:11,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2023-09-01 02:13:11,222 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -12 predicate places. [2023-09-01 02:13:11,222 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 274 flow [2023-09-01 02:13:11,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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 02:13:11,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:11,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:13:11,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:11,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1275969394, now seen corresponding path program 1 times [2023-09-01 02:13:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:11,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511761200] [2023-09-01 02:13:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:11,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:11,339 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 02:13:11,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:11,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511761200] [2023-09-01 02:13:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511761200] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833187980] [2023-09-01 02:13:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:11,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:13:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:13:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:13:11,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-09-01 02:13:11,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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 02:13:11,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:11,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-09-01 02:13:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:19,849 INFO L130 PetriNetUnfolder]: 108919/165661 cut-off events. [2023-09-01 02:13:19,850 INFO L131 PetriNetUnfolder]: For 4546/4554 co-relation queries the response was YES. [2023-09-01 02:13:20,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303282 conditions, 165661 events. 108919/165661 cut-off events. For 4546/4554 co-relation queries the response was YES. Maximal size of possible extension queue 6968. Compared 1435150 event pairs, 83792 based on Foata normal form. 0/107486 useless extension candidates. Maximal degree in co-relation 303277. Up to 121876 conditions per place. [2023-09-01 02:13:20,973 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 101 selfloop transitions, 7 changer transitions 0/159 dead transitions. [2023-09-01 02:13:20,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 601 flow [2023-09-01 02:13:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2023-09-01 02:13:20,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717213114754098 [2023-09-01 02:13:20,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2023-09-01 02:13:20,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2023-09-01 02:13:20,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:20,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2023-09-01 02:13:20,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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 02:13:20,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:20,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:20,982 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 274 flow. Second operand 3 states and 837 transitions. [2023-09-01 02:13:20,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 601 flow [2023-09-01 02:13:20,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:13:20,988 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 331 flow [2023-09-01 02:13:20,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2023-09-01 02:13:20,989 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -9 predicate places. [2023-09-01 02:13:20,990 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 331 flow [2023-09-01 02:13:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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 02:13:20,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:20,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:20,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:13:20,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:20,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:20,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1275969393, now seen corresponding path program 1 times [2023-09-01 02:13:20,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:20,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652591514] [2023-09-01 02:13:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:20,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:21,073 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 02:13:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652591514] [2023-09-01 02:13:21,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652591514] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:21,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:21,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961372897] [2023-09-01 02:13:21,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:13:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:13:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:13:21,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-09-01 02:13:21,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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 02:13:21,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:21,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-09-01 02:13:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:27,682 INFO L130 PetriNetUnfolder]: 79628/123199 cut-off events. [2023-09-01 02:13:27,682 INFO L131 PetriNetUnfolder]: For 13354/13354 co-relation queries the response was YES. [2023-09-01 02:13:27,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233300 conditions, 123199 events. 79628/123199 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 5005. Compared 1057739 event pairs, 61618 based on Foata normal form. 5678/89013 useless extension candidates. Maximal degree in co-relation 233294. Up to 92259 conditions per place. [2023-09-01 02:13:28,374 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 87 selfloop transitions, 3 changer transitions 0/143 dead transitions. [2023-09-01 02:13:28,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 143 transitions, 578 flow [2023-09-01 02:13:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-09-01 02:13:28,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806010928961749 [2023-09-01 02:13:28,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-09-01 02:13:28,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-09-01 02:13:28,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:28,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-09-01 02:13:28,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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 02:13:28,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:28,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:28,383 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 331 flow. Second operand 3 states and 850 transitions. [2023-09-01 02:13:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 143 transitions, 578 flow [2023-09-01 02:13:28,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:13:28,412 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 319 flow [2023-09-01 02:13:28,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2023-09-01 02:13:28,413 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -11 predicate places. [2023-09-01 02:13:28,414 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 319 flow [2023-09-01 02:13:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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 02:13:28,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:28,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:13:28,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:28,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1006467714, now seen corresponding path program 1 times [2023-09-01 02:13:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904130056] [2023-09-01 02:13:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:28,450 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 02:13:28,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:28,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904130056] [2023-09-01 02:13:28,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904130056] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:28,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:28,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:13:28,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069429779] [2023-09-01 02:13:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:13:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:13:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:13:28,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 488 [2023-09-01 02:13:28,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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 02:13:28,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:28,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 488 [2023-09-01 02:13:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:36,473 INFO L130 PetriNetUnfolder]: 98963/147430 cut-off events. [2023-09-01 02:13:36,474 INFO L131 PetriNetUnfolder]: For 16123/16132 co-relation queries the response was YES. [2023-09-01 02:13:36,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285509 conditions, 147430 events. 98963/147430 cut-off events. For 16123/16132 co-relation queries the response was YES. Maximal size of possible extension queue 5861. Compared 1218819 event pairs, 58534 based on Foata normal form. 0/97624 useless extension candidates. Maximal degree in co-relation 285503. Up to 95465 conditions per place. [2023-09-01 02:13:37,242 INFO L137 encePairwiseOnDemand]: 481/488 looper letters, 121 selfloop transitions, 6 changer transitions 0/178 dead transitions. [2023-09-01 02:13:37,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 178 transitions, 768 flow [2023-09-01 02:13:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2023-09-01 02:13:37,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-09-01 02:13:37,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2023-09-01 02:13:37,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2023-09-01 02:13:37,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:37,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2023-09-01 02:13:37,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 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 02:13:37,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:37,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:37,251 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 319 flow. Second operand 3 states and 854 transitions. [2023-09-01 02:13:37,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 178 transitions, 768 flow [2023-09-01 02:13:37,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 178 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:13:37,272 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 361 flow [2023-09-01 02:13:37,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2023-09-01 02:13:37,273 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -9 predicate places. [2023-09-01 02:13:37,273 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 361 flow [2023-09-01 02:13:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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 02:13:37,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:37,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:13:37,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:37,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1006467715, now seen corresponding path program 1 times [2023-09-01 02:13:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843260864] [2023-09-01 02:13:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:37,328 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 02:13:37,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:37,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843260864] [2023-09-01 02:13:37,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843260864] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:37,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:37,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:37,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416019746] [2023-09-01 02:13:37,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:37,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:13:37,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:13:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:13:37,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 488 [2023-09-01 02:13:37,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 240.5) internal successors, (962), 4 states have internal predecessors, (962), 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 02:13:37,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:37,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 488 [2023-09-01 02:13:37,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:44,691 INFO L130 PetriNetUnfolder]: 81264/128171 cut-off events. [2023-09-01 02:13:44,691 INFO L131 PetriNetUnfolder]: For 30115/30316 co-relation queries the response was YES. [2023-09-01 02:13:44,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256799 conditions, 128171 events. 81264/128171 cut-off events. For 30115/30316 co-relation queries the response was YES. Maximal size of possible extension queue 5056. Compared 1135846 event pairs, 57381 based on Foata normal form. 3922/97901 useless extension candidates. Maximal degree in co-relation 256792. Up to 90238 conditions per place. [2023-09-01 02:13:45,403 INFO L137 encePairwiseOnDemand]: 481/488 looper letters, 110 selfloop transitions, 13 changer transitions 0/178 dead transitions. [2023-09-01 02:13:45,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 178 transitions, 786 flow [2023-09-01 02:13:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-09-01 02:13:45,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621584699453552 [2023-09-01 02:13:45,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-09-01 02:13:45,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-09-01 02:13:45,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:45,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-09-01 02:13:45,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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 02:13:45,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:45,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:45,411 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 361 flow. Second operand 3 states and 823 transitions. [2023-09-01 02:13:45,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 178 transitions, 786 flow [2023-09-01 02:13:45,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 178 transitions, 770 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:13:45,445 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 473 flow [2023-09-01 02:13:45,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2023-09-01 02:13:45,446 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2023-09-01 02:13:45,447 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 473 flow [2023-09-01 02:13:45,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 240.5) internal successors, (962), 4 states have internal predecessors, (962), 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 02:13:45,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:45,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:13:45,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:45,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -638025744, now seen corresponding path program 1 times [2023-09-01 02:13:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108166407] [2023-09-01 02:13:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:45,593 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 02:13:45,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108166407] [2023-09-01 02:13:45,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108166407] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:45,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091367452] [2023-09-01 02:13:45,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:13:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:13:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:13:45,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 488 [2023-09-01 02:13:45,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 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 02:13:45,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:45,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 488 [2023-09-01 02:13:45,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:52,092 INFO L130 PetriNetUnfolder]: 65439/106009 cut-off events. [2023-09-01 02:13:52,093 INFO L131 PetriNetUnfolder]: For 40253/40265 co-relation queries the response was YES. [2023-09-01 02:13:52,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217332 conditions, 106009 events. 65439/106009 cut-off events. For 40253/40265 co-relation queries the response was YES. Maximal size of possible extension queue 3891. Compared 948551 event pairs, 42852 based on Foata normal form. 4307/81932 useless extension candidates. Maximal degree in co-relation 217324. Up to 62329 conditions per place. [2023-09-01 02:13:53,091 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 176 selfloop transitions, 13 changer transitions 0/240 dead transitions. [2023-09-01 02:13:53,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 240 transitions, 1246 flow [2023-09-01 02:13:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:13:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:13:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1099 transitions. [2023-09-01 02:13:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630122950819673 [2023-09-01 02:13:53,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1099 transitions. [2023-09-01 02:13:53,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1099 transitions. [2023-09-01 02:13:53,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:53,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1099 transitions. [2023-09-01 02:13:53,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 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 02:13:53,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:13:53,100 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:13:53,100 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 473 flow. Second operand 4 states and 1099 transitions. [2023-09-01 02:13:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 240 transitions, 1246 flow [2023-09-01 02:13:53,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 240 transitions, 1202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:13:53,124 INFO L231 Difference]: Finished difference. Result has 120 places, 141 transitions, 573 flow [2023-09-01 02:13:53,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=573, PETRI_PLACES=120, PETRI_TRANSITIONS=141} [2023-09-01 02:13:53,125 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2023-09-01 02:13:53,125 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 141 transitions, 573 flow [2023-09-01 02:13:53,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 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 02:13:53,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:53,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 02:13:53,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:53,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash -98376214, now seen corresponding path program 1 times [2023-09-01 02:13:53,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165500003] [2023-09-01 02:13:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:53,189 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 02:13:53,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165500003] [2023-09-01 02:13:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165500003] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:53,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:53,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857111961] [2023-09-01 02:13:53,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:53,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:13:53,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:13:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:13:53,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-09-01 02:13:53,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 141 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 02:13:53,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:53,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-09-01 02:13:53,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:13:59,106 INFO L130 PetriNetUnfolder]: 64953/98439 cut-off events. [2023-09-01 02:13:59,106 INFO L131 PetriNetUnfolder]: For 38913/39251 co-relation queries the response was YES. [2023-09-01 02:13:59,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210577 conditions, 98439 events. 64953/98439 cut-off events. For 38913/39251 co-relation queries the response was YES. Maximal size of possible extension queue 3702. Compared 807105 event pairs, 23507 based on Foata normal form. 2258/72122 useless extension candidates. Maximal degree in co-relation 210567. Up to 70798 conditions per place. [2023-09-01 02:13:59,681 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 112 selfloop transitions, 8 changer transitions 0/177 dead transitions. [2023-09-01 02:13:59,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 994 flow [2023-09-01 02:13:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:13:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:13:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-09-01 02:13:59,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806010928961749 [2023-09-01 02:13:59,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-09-01 02:13:59,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-09-01 02:13:59,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:13:59,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-09-01 02:13:59,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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 02:13:59,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:59,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:13:59,688 INFO L175 Difference]: Start difference. First operand has 120 places, 141 transitions, 573 flow. Second operand 3 states and 850 transitions. [2023-09-01 02:13:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 994 flow [2023-09-01 02:13:59,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 994 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:13:59,721 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 585 flow [2023-09-01 02:13:59,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=585, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2023-09-01 02:13:59,722 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2023-09-01 02:13:59,722 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 585 flow [2023-09-01 02:13:59,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 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 02:13:59,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:13:59,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:13:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:13:59,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:13:59,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:13:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1086867388, now seen corresponding path program 1 times [2023-09-01 02:13:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:13:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322527682] [2023-09-01 02:13:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:13:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:13:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:13:59,809 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 02:13:59,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:13:59,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322527682] [2023-09-01 02:13:59,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322527682] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:13:59,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:13:59,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:13:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586649427] [2023-09-01 02:13:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:13:59,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:13:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:13:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:13:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:13:59,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-09-01 02:13:59,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 585 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 02:13:59,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:13:59,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-09-01 02:13:59,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:05,580 INFO L130 PetriNetUnfolder]: 57497/93374 cut-off events. [2023-09-01 02:14:05,580 INFO L131 PetriNetUnfolder]: For 42561/42607 co-relation queries the response was YES. [2023-09-01 02:14:05,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197488 conditions, 93374 events. 57497/93374 cut-off events. For 42561/42607 co-relation queries the response was YES. Maximal size of possible extension queue 3182. Compared 832170 event pairs, 20048 based on Foata normal form. 0/69455 useless extension candidates. Maximal degree in co-relation 197477. Up to 58689 conditions per place. [2023-09-01 02:14:06,121 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 122 selfloop transitions, 17 changer transitions 0/194 dead transitions. [2023-09-01 02:14:06,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1086 flow [2023-09-01 02:14:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-09-01 02:14:06,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703551912568307 [2023-09-01 02:14:06,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-09-01 02:14:06,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-09-01 02:14:06,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:06,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-09-01 02:14:06,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 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 02:14:06,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:06,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:06,132 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 585 flow. Second operand 3 states and 835 transitions. [2023-09-01 02:14:06,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1086 flow [2023-09-01 02:14:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 194 transitions, 1062 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:06,190 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 733 flow [2023-09-01 02:14:06,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=733, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2023-09-01 02:14:06,191 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -1 predicate places. [2023-09-01 02:14:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 733 flow [2023-09-01 02:14:06,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 02:14:06,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:06,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 02:14:06,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:06,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1086867389, now seen corresponding path program 1 times [2023-09-01 02:14:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:06,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321234053] [2023-09-01 02:14:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:06,303 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 02:14:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321234053] [2023-09-01 02:14:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321234053] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:14:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32956247] [2023-09-01 02:14:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:14:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:14:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:14:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 488 [2023-09-01 02:14:06,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 733 flow. Second operand has 4 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 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 02:14:06,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:06,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 488 [2023-09-01 02:14:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:10,760 INFO L130 PetriNetUnfolder]: 43065/68184 cut-off events. [2023-09-01 02:14:10,761 INFO L131 PetriNetUnfolder]: For 45526/45590 co-relation queries the response was YES. [2023-09-01 02:14:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155735 conditions, 68184 events. 43065/68184 cut-off events. For 45526/45590 co-relation queries the response was YES. Maximal size of possible extension queue 2315. Compared 563566 event pairs, 14447 based on Foata normal form. 3677/54480 useless extension candidates. Maximal degree in co-relation 155723. Up to 42657 conditions per place. [2023-09-01 02:14:11,171 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 125 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2023-09-01 02:14:11,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1221 flow [2023-09-01 02:14:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:14:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:14:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1078 transitions. [2023-09-01 02:14:11,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522540983606558 [2023-09-01 02:14:11,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1078 transitions. [2023-09-01 02:14:11,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1078 transitions. [2023-09-01 02:14:11,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:11,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1078 transitions. [2023-09-01 02:14:11,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 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 02:14:11,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:14:11,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:14:11,379 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 733 flow. Second operand 4 states and 1078 transitions. [2023-09-01 02:14:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1221 flow [2023-09-01 02:14:11,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 1187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:11,427 INFO L231 Difference]: Finished difference. Result has 121 places, 148 transitions, 737 flow [2023-09-01 02:14:11,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=121, PETRI_TRANSITIONS=148} [2023-09-01 02:14:11,428 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2023-09-01 02:14:11,428 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 148 transitions, 737 flow [2023-09-01 02:14:11,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 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 02:14:11,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:11,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:11,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:14:11,430 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:11,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -98376215, now seen corresponding path program 1 times [2023-09-01 02:14:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:11,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582927280] [2023-09-01 02:14:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:11,469 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 02:14:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582927280] [2023-09-01 02:14:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582927280] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171902994] [2023-09-01 02:14:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:11,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-09-01 02:14:11,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 148 transitions, 737 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 02:14:11,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:11,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-09-01 02:14:11,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:16,454 INFO L130 PetriNetUnfolder]: 49871/77670 cut-off events. [2023-09-01 02:14:16,454 INFO L131 PetriNetUnfolder]: For 53053/53348 co-relation queries the response was YES. [2023-09-01 02:14:16,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178722 conditions, 77670 events. 49871/77670 cut-off events. For 53053/53348 co-relation queries the response was YES. Maximal size of possible extension queue 2563. Compared 638973 event pairs, 32837 based on Foata normal form. 78/57681 useless extension candidates. Maximal degree in co-relation 178710. Up to 44837 conditions per place. [2023-09-01 02:14:16,871 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 130 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-09-01 02:14:16,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1238 flow [2023-09-01 02:14:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-09-01 02:14:16,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710382513661202 [2023-09-01 02:14:16,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-09-01 02:14:16,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-09-01 02:14:16,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:16,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-09-01 02:14:16,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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 02:14:16,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:16,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:16,892 INFO L175 Difference]: Start difference. First operand has 121 places, 148 transitions, 737 flow. Second operand 3 states and 836 transitions. [2023-09-01 02:14:16,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1238 flow [2023-09-01 02:14:16,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 1201 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:16,995 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 858 flow [2023-09-01 02:14:16,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=858, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2023-09-01 02:14:16,997 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-09-01 02:14:16,997 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 858 flow [2023-09-01 02:14:16,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 02:14:16,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:16,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 02:14:16,998 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:16,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1859653487, now seen corresponding path program 1 times [2023-09-01 02:14:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:16,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823550247] [2023-09-01 02:14:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:17,054 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 02:14:17,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:17,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823550247] [2023-09-01 02:14:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823550247] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:17,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696124973] [2023-09-01 02:14:17,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:17,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:17,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:17,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-09-01 02:14:17,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 858 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:14:17,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:17,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-09-01 02:14:17,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:22,397 INFO L130 PetriNetUnfolder]: 55312/84728 cut-off events. [2023-09-01 02:14:22,397 INFO L131 PetriNetUnfolder]: For 66904/67468 co-relation queries the response was YES. [2023-09-01 02:14:22,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201409 conditions, 84728 events. 55312/84728 cut-off events. For 66904/67468 co-relation queries the response was YES. Maximal size of possible extension queue 2919. Compared 685443 event pairs, 19449 based on Foata normal form. 63/65689 useless extension candidates. Maximal degree in co-relation 201396. Up to 51314 conditions per place. [2023-09-01 02:14:23,084 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 130 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2023-09-01 02:14:23,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 213 transitions, 1417 flow [2023-09-01 02:14:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-09-01 02:14:23,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703551912568307 [2023-09-01 02:14:23,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-09-01 02:14:23,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-09-01 02:14:23,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:23,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-09-01 02:14:23,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 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 02:14:23,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:23,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:23,089 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 858 flow. Second operand 3 states and 835 transitions. [2023-09-01 02:14:23,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 213 transitions, 1417 flow [2023-09-01 02:14:23,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 213 transitions, 1381 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:23,132 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 1061 flow [2023-09-01 02:14:23,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1061, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2023-09-01 02:14:23,133 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-09-01 02:14:23,133 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 1061 flow [2023-09-01 02:14:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:14:23,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:23,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 02:14:23,134 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:23,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1859653486, now seen corresponding path program 1 times [2023-09-01 02:14:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45402704] [2023-09-01 02:14:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:23,185 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 02:14:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45402704] [2023-09-01 02:14:23,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45402704] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:23,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:23,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004663897] [2023-09-01 02:14:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:23,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-09-01 02:14:23,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 1061 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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 02:14:23,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:23,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-09-01 02:14:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:28,233 INFO L130 PetriNetUnfolder]: 49239/75750 cut-off events. [2023-09-01 02:14:28,233 INFO L131 PetriNetUnfolder]: For 75451/76276 co-relation queries the response was YES. [2023-09-01 02:14:28,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185908 conditions, 75750 events. 49239/75750 cut-off events. For 75451/76276 co-relation queries the response was YES. Maximal size of possible extension queue 2714. Compared 608931 event pairs, 20457 based on Foata normal form. 1613/59331 useless extension candidates. Maximal degree in co-relation 185894. Up to 57159 conditions per place. [2023-09-01 02:14:28,649 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 129 selfloop transitions, 14 changer transitions 0/206 dead transitions. [2023-09-01 02:14:28,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 206 transitions, 1546 flow [2023-09-01 02:14:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2023-09-01 02:14:28,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792349726775956 [2023-09-01 02:14:28,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2023-09-01 02:14:28,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2023-09-01 02:14:28,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:28,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2023-09-01 02:14:28,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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 02:14:28,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:28,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 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 02:14:28,654 INFO L175 Difference]: Start difference. First operand has 125 places, 170 transitions, 1061 flow. Second operand 3 states and 848 transitions. [2023-09-01 02:14:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 206 transitions, 1546 flow [2023-09-01 02:14:28,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 1498 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:28,689 INFO L231 Difference]: Finished difference. Result has 123 places, 168 transitions, 1037 flow [2023-09-01 02:14:28,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1037, PETRI_PLACES=123, PETRI_TRANSITIONS=168} [2023-09-01 02:14:28,689 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-09-01 02:14:28,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 168 transitions, 1037 flow [2023-09-01 02:14:28,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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 02:14:28,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:28,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 02:14:28,691 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:28,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -144456215, now seen corresponding path program 1 times [2023-09-01 02:14:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085801627] [2023-09-01 02:14:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:28,843 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 02:14:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:28,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085801627] [2023-09-01 02:14:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085801627] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:28,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:28,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:28,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387781208] [2023-09-01 02:14:28,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:28,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:14:28,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:28,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:14:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:14:28,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 488 [2023-09-01 02:14:28,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 168 transitions, 1037 flow. Second operand has 4 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 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 02:14:28,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:28,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 488 [2023-09-01 02:14:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:34,192 INFO L130 PetriNetUnfolder]: 49500/77710 cut-off events. [2023-09-01 02:14:34,192 INFO L131 PetriNetUnfolder]: For 74578/75403 co-relation queries the response was YES. [2023-09-01 02:14:34,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188674 conditions, 77710 events. 49500/77710 cut-off events. For 74578/75403 co-relation queries the response was YES. Maximal size of possible extension queue 2769. Compared 640896 event pairs, 28642 based on Foata normal form. 62/59252 useless extension candidates. Maximal degree in co-relation 188660. Up to 39074 conditions per place. [2023-09-01 02:14:34,646 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 163 selfloop transitions, 38 changer transitions 0/256 dead transitions. [2023-09-01 02:14:34,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 256 transitions, 1859 flow [2023-09-01 02:14:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:14:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:14:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1088 transitions. [2023-09-01 02:14:34,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573770491803278 [2023-09-01 02:14:34,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1088 transitions. [2023-09-01 02:14:34,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1088 transitions. [2023-09-01 02:14:34,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:34,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1088 transitions. [2023-09-01 02:14:34,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 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 02:14:34,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:14:34,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 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 02:14:34,653 INFO L175 Difference]: Start difference. First operand has 123 places, 168 transitions, 1037 flow. Second operand 4 states and 1088 transitions. [2023-09-01 02:14:34,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 256 transitions, 1859 flow [2023-09-01 02:14:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 256 transitions, 1817 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:34,700 INFO L231 Difference]: Finished difference. Result has 126 places, 179 transitions, 1281 flow [2023-09-01 02:14:34,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1281, PETRI_PLACES=126, PETRI_TRANSITIONS=179} [2023-09-01 02:14:34,700 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 3 predicate places. [2023-09-01 02:14:34,700 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 179 transitions, 1281 flow [2023-09-01 02:14:34,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 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 02:14:34,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:34,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:34,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 02:14:34,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:34,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -285721489, now seen corresponding path program 1 times [2023-09-01 02:14:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598012764] [2023-09-01 02:14:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:34,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:34,865 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 02:14:34,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:34,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598012764] [2023-09-01 02:14:34,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598012764] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:34,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:34,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:14:34,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885414372] [2023-09-01 02:14:34,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:14:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:14:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:14:35,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 488 [2023-09-01 02:14:35,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 179 transitions, 1281 flow. Second operand has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 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 02:14:35,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:35,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 488 [2023-09-01 02:14:35,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:40,295 INFO L130 PetriNetUnfolder]: 48151/73657 cut-off events. [2023-09-01 02:14:40,295 INFO L131 PetriNetUnfolder]: For 90276/90654 co-relation queries the response was YES. [2023-09-01 02:14:40,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186200 conditions, 73657 events. 48151/73657 cut-off events. For 90276/90654 co-relation queries the response was YES. Maximal size of possible extension queue 2512. Compared 589398 event pairs, 17649 based on Foata normal form. 789/58414 useless extension candidates. Maximal degree in co-relation 186185. Up to 38756 conditions per place. [2023-09-01 02:14:40,785 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 162 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2023-09-01 02:14:40,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 256 transitions, 1985 flow [2023-09-01 02:14:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:14:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:14:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1311 transitions. [2023-09-01 02:14:40,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372950819672131 [2023-09-01 02:14:40,787 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1311 transitions. [2023-09-01 02:14:40,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1311 transitions. [2023-09-01 02:14:40,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:40,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1311 transitions. [2023-09-01 02:14:40,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 262.2) internal successors, (1311), 5 states have internal predecessors, (1311), 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 02:14:40,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:14:40,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 488.0) internal successors, (2928), 6 states have internal predecessors, (2928), 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 02:14:40,793 INFO L175 Difference]: Start difference. First operand has 126 places, 179 transitions, 1281 flow. Second operand 5 states and 1311 transitions. [2023-09-01 02:14:40,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 256 transitions, 1985 flow [2023-09-01 02:14:40,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 256 transitions, 1979 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-09-01 02:14:40,844 INFO L231 Difference]: Finished difference. Result has 132 places, 180 transitions, 1445 flow [2023-09-01 02:14:40,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1445, PETRI_PLACES=132, PETRI_TRANSITIONS=180} [2023-09-01 02:14:40,845 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 9 predicate places. [2023-09-01 02:14:40,845 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 180 transitions, 1445 flow [2023-09-01 02:14:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 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 02:14:40,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:40,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 02:14:40,846 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:40,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1767988619, now seen corresponding path program 1 times [2023-09-01 02:14:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356563197] [2023-09-01 02:14:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:41,259 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 02:14:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356563197] [2023-09-01 02:14:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356563197] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:41,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:41,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:14:41,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117769518] [2023-09-01 02:14:41,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:14:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:14:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:14:41,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 488 [2023-09-01 02:14:41,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 180 transitions, 1445 flow. Second operand has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 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 02:14:41,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:41,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 488 [2023-09-01 02:14:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:46,934 INFO L130 PetriNetUnfolder]: 46896/73239 cut-off events. [2023-09-01 02:14:46,934 INFO L131 PetriNetUnfolder]: For 110552/110934 co-relation queries the response was YES. [2023-09-01 02:14:47,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183591 conditions, 73239 events. 46896/73239 cut-off events. For 110552/110934 co-relation queries the response was YES. Maximal size of possible extension queue 2541. Compared 596282 event pairs, 26896 based on Foata normal form. 358/56935 useless extension candidates. Maximal degree in co-relation 183573. Up to 38176 conditions per place. [2023-09-01 02:14:47,415 INFO L137 encePairwiseOnDemand]: 477/488 looper letters, 201 selfloop transitions, 56 changer transitions 0/316 dead transitions. [2023-09-01 02:14:47,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 316 transitions, 2465 flow [2023-09-01 02:14:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:14:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:14:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1597 transitions. [2023-09-01 02:14:47,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454234972677595 [2023-09-01 02:14:47,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1597 transitions. [2023-09-01 02:14:47,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1597 transitions. [2023-09-01 02:14:47,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:47,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1597 transitions. [2023-09-01 02:14:47,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.1666666666667) internal successors, (1597), 6 states have internal predecessors, (1597), 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 02:14:47,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:14:47,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:14:47,423 INFO L175 Difference]: Start difference. First operand has 132 places, 180 transitions, 1445 flow. Second operand 6 states and 1597 transitions. [2023-09-01 02:14:47,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 316 transitions, 2465 flow [2023-09-01 02:14:47,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 316 transitions, 2425 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 02:14:47,548 INFO L231 Difference]: Finished difference. Result has 140 places, 194 transitions, 1767 flow [2023-09-01 02:14:47,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1767, PETRI_PLACES=140, PETRI_TRANSITIONS=194} [2023-09-01 02:14:47,549 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2023-09-01 02:14:47,549 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 194 transitions, 1767 flow [2023-09-01 02:14:47,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.83333333333334) internal successors, (1427), 6 states have internal predecessors, (1427), 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 02:14:47,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:47,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:47,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 02:14:47,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:47,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1987288128, now seen corresponding path program 1 times [2023-09-01 02:14:47,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:47,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316668265] [2023-09-01 02:14:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:47,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:47,773 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 02:14:47,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:47,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316668265] [2023-09-01 02:14:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316668265] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:47,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:47,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:14:47,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337582223] [2023-09-01 02:14:47,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:47,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:14:47,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:14:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:14:47,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 488 [2023-09-01 02:14:47,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 194 transitions, 1767 flow. Second operand has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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 02:14:47,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:47,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 488 [2023-09-01 02:14:47,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:53,768 INFO L130 PetriNetUnfolder]: 47556/74565 cut-off events. [2023-09-01 02:14:53,768 INFO L131 PetriNetUnfolder]: For 137010/137294 co-relation queries the response was YES. [2023-09-01 02:14:54,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194221 conditions, 74565 events. 47556/74565 cut-off events. For 137010/137294 co-relation queries the response was YES. Maximal size of possible extension queue 2601. Compared 613130 event pairs, 15038 based on Foata normal form. 287/58640 useless extension candidates. Maximal degree in co-relation 194199. Up to 35237 conditions per place. [2023-09-01 02:14:54,563 INFO L137 encePairwiseOnDemand]: 477/488 looper letters, 221 selfloop transitions, 75 changer transitions 0/355 dead transitions. [2023-09-01 02:14:54,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 355 transitions, 3176 flow [2023-09-01 02:14:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 02:14:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 02:14:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1831 transitions. [2023-09-01 02:14:54,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360070257611241 [2023-09-01 02:14:54,566 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1831 transitions. [2023-09-01 02:14:54,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1831 transitions. [2023-09-01 02:14:54,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:54,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1831 transitions. [2023-09-01 02:14:54,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 261.57142857142856) internal successors, (1831), 7 states have internal predecessors, (1831), 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 02:14:54,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 488.0) internal successors, (3904), 8 states have internal predecessors, (3904), 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 02:14:54,572 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 488.0) internal successors, (3904), 8 states have internal predecessors, (3904), 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 02:14:54,572 INFO L175 Difference]: Start difference. First operand has 140 places, 194 transitions, 1767 flow. Second operand 7 states and 1831 transitions. [2023-09-01 02:14:54,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 355 transitions, 3176 flow [2023-09-01 02:14:54,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 355 transitions, 3122 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-09-01 02:14:54,799 INFO L231 Difference]: Finished difference. Result has 148 places, 222 transitions, 2429 flow [2023-09-01 02:14:54,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2429, PETRI_PLACES=148, PETRI_TRANSITIONS=222} [2023-09-01 02:14:54,800 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 25 predicate places. [2023-09-01 02:14:54,800 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 222 transitions, 2429 flow [2023-09-01 02:14:54,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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 02:14:54,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:54,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:54,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 02:14:54,801 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:54,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1046178734, now seen corresponding path program 1 times [2023-09-01 02:14:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220285553] [2023-09-01 02:14:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:54,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:54,975 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 02:14:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220285553] [2023-09-01 02:14:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220285553] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:54,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:54,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:14:54,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93958078] [2023-09-01 02:14:54,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:14:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:14:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:14:55,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 488 [2023-09-01 02:14:55,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 222 transitions, 2429 flow. Second operand has 8 states, 8 states have (on average 233.375) internal successors, (1867), 8 states have internal predecessors, (1867), 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 02:14:55,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:55,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 488 [2023-09-01 02:14:55,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:01,319 INFO L130 PetriNetUnfolder]: 46427/72094 cut-off events. [2023-09-01 02:15:01,319 INFO L131 PetriNetUnfolder]: For 171752/172257 co-relation queries the response was YES. [2023-09-01 02:15:01,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197610 conditions, 72094 events. 46427/72094 cut-off events. For 171752/172257 co-relation queries the response was YES. Maximal size of possible extension queue 2418. Compared 582413 event pairs, 29606 based on Foata normal form. 505/56076 useless extension candidates. Maximal degree in co-relation 197585. Up to 37857 conditions per place. [2023-09-01 02:15:01,886 INFO L137 encePairwiseOnDemand]: 475/488 looper letters, 199 selfloop transitions, 89 changer transitions 0/342 dead transitions. [2023-09-01 02:15:01,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 342 transitions, 3541 flow [2023-09-01 02:15:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:15:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:15:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2028 transitions. [2023-09-01 02:15:01,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194672131147541 [2023-09-01 02:15:01,889 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2028 transitions. [2023-09-01 02:15:01,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2028 transitions. [2023-09-01 02:15:01,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:01,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2028 transitions. [2023-09-01 02:15:01,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 253.5) internal successors, (2028), 8 states have internal predecessors, (2028), 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 02:15:01,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 488.0) internal successors, (4392), 9 states have internal predecessors, (4392), 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 02:15:01,896 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 488.0) internal successors, (4392), 9 states have internal predecessors, (4392), 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 02:15:01,896 INFO L175 Difference]: Start difference. First operand has 148 places, 222 transitions, 2429 flow. Second operand 8 states and 2028 transitions. [2023-09-01 02:15:01,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 342 transitions, 3541 flow [2023-09-01 02:15:02,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 342 transitions, 3529 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:02,251 INFO L231 Difference]: Finished difference. Result has 159 places, 236 transitions, 2945 flow [2023-09-01 02:15:02,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2945, PETRI_PLACES=159, PETRI_TRANSITIONS=236} [2023-09-01 02:15:02,252 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 36 predicate places. [2023-09-01 02:15:02,252 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 236 transitions, 2945 flow [2023-09-01 02:15:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 233.375) internal successors, (1867), 8 states have internal predecessors, (1867), 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 02:15:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:02,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 02:15:02,253 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:02,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash -906517409, now seen corresponding path program 1 times [2023-09-01 02:15:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986602820] [2023-09-01 02:15:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:02,848 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 02:15:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986602820] [2023-09-01 02:15:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986602820] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:02,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:02,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:15:02,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515163564] [2023-09-01 02:15:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:15:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:15:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:15:03,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 488 [2023-09-01 02:15:03,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 236 transitions, 2945 flow. Second operand has 9 states, 9 states have (on average 229.22222222222223) internal successors, (2063), 9 states have internal predecessors, (2063), 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 02:15:03,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:03,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 488 [2023-09-01 02:15:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:10,341 INFO L130 PetriNetUnfolder]: 48523/76646 cut-off events. [2023-09-01 02:15:10,341 INFO L131 PetriNetUnfolder]: For 241313/241621 co-relation queries the response was YES. [2023-09-01 02:15:10,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215528 conditions, 76646 events. 48523/76646 cut-off events. For 241313/241621 co-relation queries the response was YES. Maximal size of possible extension queue 2791. Compared 642045 event pairs, 30233 based on Foata normal form. 882/60235 useless extension candidates. Maximal degree in co-relation 215499. Up to 37909 conditions per place. [2023-09-01 02:15:10,943 INFO L137 encePairwiseOnDemand]: 474/488 looper letters, 309 selfloop transitions, 120 changer transitions 0/478 dead transitions. [2023-09-01 02:15:10,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 478 transitions, 5515 flow [2023-09-01 02:15:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:15:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:15:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2762 transitions. [2023-09-01 02:15:10,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145305514157973 [2023-09-01 02:15:10,947 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2762 transitions. [2023-09-01 02:15:10,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2762 transitions. [2023-09-01 02:15:10,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:10,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2762 transitions. [2023-09-01 02:15:10,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 251.0909090909091) internal successors, (2762), 11 states have internal predecessors, (2762), 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 02:15:10,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 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 02:15:10,956 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 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 02:15:10,956 INFO L175 Difference]: Start difference. First operand has 159 places, 236 transitions, 2945 flow. Second operand 11 states and 2762 transitions. [2023-09-01 02:15:10,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 478 transitions, 5515 flow [2023-09-01 02:15:11,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 478 transitions, 5428 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-09-01 02:15:11,419 INFO L231 Difference]: Finished difference. Result has 167 places, 278 transitions, 3943 flow [2023-09-01 02:15:11,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3943, PETRI_PLACES=167, PETRI_TRANSITIONS=278} [2023-09-01 02:15:11,420 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 44 predicate places. [2023-09-01 02:15:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 278 transitions, 3943 flow [2023-09-01 02:15:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 229.22222222222223) internal successors, (2063), 9 states have internal predecessors, (2063), 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 02:15:11,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:11,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 02:15:11,421 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:11,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1476390047, now seen corresponding path program 1 times [2023-09-01 02:15:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806529007] [2023-09-01 02:15:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:11,596 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 02:15:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806529007] [2023-09-01 02:15:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806529007] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:11,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:11,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:15:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989561033] [2023-09-01 02:15:11,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:11,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:11,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 488 [2023-09-01 02:15:11,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 278 transitions, 3943 flow. Second operand has 7 states, 7 states have (on average 233.57142857142858) internal successors, (1635), 7 states have internal predecessors, (1635), 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 02:15:11,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:11,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 488 [2023-09-01 02:15:11,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:20,015 INFO L130 PetriNetUnfolder]: 47054/75174 cut-off events. [2023-09-01 02:15:20,016 INFO L131 PetriNetUnfolder]: For 248954/249145 co-relation queries the response was YES. [2023-09-01 02:15:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211320 conditions, 75174 events. 47054/75174 cut-off events. For 248954/249145 co-relation queries the response was YES. Maximal size of possible extension queue 2684. Compared 637257 event pairs, 15359 based on Foata normal form. 584/59590 useless extension candidates. Maximal degree in co-relation 211289. Up to 34174 conditions per place. [2023-09-01 02:15:20,669 INFO L137 encePairwiseOnDemand]: 474/488 looper letters, 250 selfloop transitions, 127 changer transitions 0/446 dead transitions. [2023-09-01 02:15:20,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 446 transitions, 5571 flow [2023-09-01 02:15:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 02:15:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 02:15:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2533 transitions. [2023-09-01 02:15:20,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190573770491803 [2023-09-01 02:15:20,673 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2533 transitions. [2023-09-01 02:15:20,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2533 transitions. [2023-09-01 02:15:20,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:20,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2533 transitions. [2023-09-01 02:15:20,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 253.3) internal successors, (2533), 10 states have internal predecessors, (2533), 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 02:15:20,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 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 02:15:20,682 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 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 02:15:20,682 INFO L175 Difference]: Start difference. First operand has 167 places, 278 transitions, 3943 flow. Second operand 10 states and 2533 transitions. [2023-09-01 02:15:20,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 446 transitions, 5571 flow [2023-09-01 02:15:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 446 transitions, 5326 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-09-01 02:15:21,521 INFO L231 Difference]: Finished difference. Result has 174 places, 300 transitions, 4583 flow [2023-09-01 02:15:21,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4583, PETRI_PLACES=174, PETRI_TRANSITIONS=300} [2023-09-01 02:15:21,522 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 51 predicate places. [2023-09-01 02:15:21,522 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 300 transitions, 4583 flow [2023-09-01 02:15:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 233.57142857142858) internal successors, (1635), 7 states have internal predecessors, (1635), 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 02:15:21,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:21,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 02:15:21,523 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:21,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2036864068, now seen corresponding path program 1 times [2023-09-01 02:15:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791623531] [2023-09-01 02:15:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:21,645 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 02:15:21,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:21,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791623531] [2023-09-01 02:15:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791623531] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:21,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:21,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:15:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504523988] [2023-09-01 02:15:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:15:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:15:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:15:21,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 488 [2023-09-01 02:15:21,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 300 transitions, 4583 flow. Second operand has 5 states, 5 states have (on average 241.8) internal successors, (1209), 5 states have internal predecessors, (1209), 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 02:15:21,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:21,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 488 [2023-09-01 02:15:21,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:29,237 INFO L130 PetriNetUnfolder]: 47176/75468 cut-off events. [2023-09-01 02:15:29,237 INFO L131 PetriNetUnfolder]: For 280137/280496 co-relation queries the response was YES. [2023-09-01 02:15:29,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214852 conditions, 75468 events. 47176/75468 cut-off events. For 280137/280496 co-relation queries the response was YES. Maximal size of possible extension queue 2648. Compared 639869 event pairs, 14252 based on Foata normal form. 278/59488 useless extension candidates. Maximal degree in co-relation 214821. Up to 35526 conditions per place. [2023-09-01 02:15:29,905 INFO L137 encePairwiseOnDemand]: 474/488 looper letters, 247 selfloop transitions, 107 changer transitions 0/413 dead transitions. [2023-09-01 02:15:29,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 413 transitions, 5923 flow [2023-09-01 02:15:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:15:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:15:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1597 transitions. [2023-09-01 02:15:29,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454234972677595 [2023-09-01 02:15:29,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1597 transitions. [2023-09-01 02:15:29,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1597 transitions. [2023-09-01 02:15:29,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:29,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1597 transitions. [2023-09-01 02:15:29,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.1666666666667) internal successors, (1597), 6 states have internal predecessors, (1597), 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 02:15:29,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:15:29,913 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:15:29,913 INFO L175 Difference]: Start difference. First operand has 174 places, 300 transitions, 4583 flow. Second operand 6 states and 1597 transitions. [2023-09-01 02:15:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 413 transitions, 5923 flow [2023-09-01 02:15:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 413 transitions, 5843 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-09-01 02:15:30,783 INFO L231 Difference]: Finished difference. Result has 181 places, 310 transitions, 5076 flow [2023-09-01 02:15:30,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5076, PETRI_PLACES=181, PETRI_TRANSITIONS=310} [2023-09-01 02:15:30,784 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 58 predicate places. [2023-09-01 02:15:30,784 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 310 transitions, 5076 flow [2023-09-01 02:15:30,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 241.8) internal successors, (1209), 5 states have internal predecessors, (1209), 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 02:15:30,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:30,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:30,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 02:15:30,785 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:30,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1950726829, now seen corresponding path program 1 times [2023-09-01 02:15:30,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:30,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829193232] [2023-09-01 02:15:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:30,982 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 02:15:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829193232] [2023-09-01 02:15:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829193232] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:30,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:15:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368759582] [2023-09-01 02:15:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:31,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 488 [2023-09-01 02:15:31,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 310 transitions, 5076 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:15:31,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:31,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 488 [2023-09-01 02:15:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:40,094 INFO L130 PetriNetUnfolder]: 53607/84649 cut-off events. [2023-09-01 02:15:40,094 INFO L131 PetriNetUnfolder]: For 354230/354294 co-relation queries the response was YES. [2023-09-01 02:15:40,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244905 conditions, 84649 events. 53607/84649 cut-off events. For 354230/354294 co-relation queries the response was YES. Maximal size of possible extension queue 2864. Compared 713021 event pairs, 15438 based on Foata normal form. 238/67757 useless extension candidates. Maximal degree in co-relation 244871. Up to 40468 conditions per place. [2023-09-01 02:15:41,157 INFO L137 encePairwiseOnDemand]: 469/488 looper letters, 370 selfloop transitions, 178 changer transitions 0/599 dead transitions. [2023-09-01 02:15:41,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 599 transitions, 8182 flow [2023-09-01 02:15:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:15:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:15:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3112 transitions. [2023-09-01 02:15:41,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314207650273224 [2023-09-01 02:15:41,160 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3112 transitions. [2023-09-01 02:15:41,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3112 transitions. [2023-09-01 02:15:41,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:41,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3112 transitions. [2023-09-01 02:15:41,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 259.3333333333333) internal successors, (3112), 12 states have internal predecessors, (3112), 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 02:15:41,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 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 02:15:41,169 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 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 02:15:41,169 INFO L175 Difference]: Start difference. First operand has 181 places, 310 transitions, 5076 flow. Second operand 12 states and 3112 transitions. [2023-09-01 02:15:41,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 599 transitions, 8182 flow [2023-09-01 02:15:42,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 599 transitions, 8130 flow, removed 26 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:42,594 INFO L231 Difference]: Finished difference. Result has 198 places, 358 transitions, 6617 flow [2023-09-01 02:15:42,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4934, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6617, PETRI_PLACES=198, PETRI_TRANSITIONS=358} [2023-09-01 02:15:42,594 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 75 predicate places. [2023-09-01 02:15:42,594 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 358 transitions, 6617 flow [2023-09-01 02:15:42,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:15:42,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:42,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:42,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 02:15:42,595 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:42,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2051989909, now seen corresponding path program 1 times [2023-09-01 02:15:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:42,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22998322] [2023-09-01 02:15:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:42,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:42,743 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 02:15:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:42,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22998322] [2023-09-01 02:15:42,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22998322] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:15:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124464897] [2023-09-01 02:15:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:42,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:42,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:42,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:42,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:42,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 488 [2023-09-01 02:15:42,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 358 transitions, 6617 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:15:42,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:42,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 488 [2023-09-01 02:15:42,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:59,446 INFO L130 PetriNetUnfolder]: 91827/141207 cut-off events. [2023-09-01 02:15:59,446 INFO L131 PetriNetUnfolder]: For 620494/620925 co-relation queries the response was YES. [2023-09-01 02:16:00,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408292 conditions, 141207 events. 91827/141207 cut-off events. For 620494/620925 co-relation queries the response was YES. Maximal size of possible extension queue 4657. Compared 1218035 event pairs, 43279 based on Foata normal form. 564/110459 useless extension candidates. Maximal degree in co-relation 408252. Up to 40416 conditions per place. [2023-09-01 02:16:00,967 INFO L137 encePairwiseOnDemand]: 471/488 looper letters, 405 selfloop transitions, 174 changer transitions 0/624 dead transitions. [2023-09-01 02:16:00,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 624 transitions, 10484 flow [2023-09-01 02:16:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:16:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:16:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2350 transitions. [2023-09-01 02:16:00,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535063752276867 [2023-09-01 02:16:00,970 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2350 transitions. [2023-09-01 02:16:00,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2350 transitions. [2023-09-01 02:16:00,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:00,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2350 transitions. [2023-09-01 02:16:00,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 261.1111111111111) internal successors, (2350), 9 states have internal predecessors, (2350), 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 02:16:00,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 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 02:16:00,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 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 02:16:00,975 INFO L175 Difference]: Start difference. First operand has 198 places, 358 transitions, 6617 flow. Second operand 9 states and 2350 transitions. [2023-09-01 02:16:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 624 transitions, 10484 flow [2023-09-01 02:16:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 624 transitions, 10345 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-09-01 02:16:06,952 INFO L231 Difference]: Finished difference. Result has 210 places, 427 transitions, 8961 flow [2023-09-01 02:16:06,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8961, PETRI_PLACES=210, PETRI_TRANSITIONS=427} [2023-09-01 02:16:06,952 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 87 predicate places. [2023-09-01 02:16:06,953 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 427 transitions, 8961 flow [2023-09-01 02:16:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:16:06,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:06,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:16:06,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 02:16:06,953 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:06,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash 97906115, now seen corresponding path program 2 times [2023-09-01 02:16:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746141189] [2023-09-01 02:16:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:07,115 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 02:16:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:07,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746141189] [2023-09-01 02:16:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746141189] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:16:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372405630] [2023-09-01 02:16:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:16:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:16:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:16:07,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 488 [2023-09-01 02:16:07,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 427 transitions, 8961 flow. Second operand has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:16:07,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:07,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 488 [2023-09-01 02:16:07,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:25,684 INFO L130 PetriNetUnfolder]: 93561/144531 cut-off events. [2023-09-01 02:16:25,684 INFO L131 PetriNetUnfolder]: For 758980/759168 co-relation queries the response was YES. [2023-09-01 02:16:26,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431938 conditions, 144531 events. 93561/144531 cut-off events. For 758980/759168 co-relation queries the response was YES. Maximal size of possible extension queue 4508. Compared 1262164 event pairs, 26886 based on Foata normal form. 460/115223 useless extension candidates. Maximal degree in co-relation 431893. Up to 80808 conditions per place. [2023-09-01 02:16:27,622 INFO L137 encePairwiseOnDemand]: 469/488 looper letters, 426 selfloop transitions, 252 changer transitions 0/723 dead transitions. [2023-09-01 02:16:27,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 723 transitions, 12672 flow [2023-09-01 02:16:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 02:16:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 02:16:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3112 transitions. [2023-09-01 02:16:27,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314207650273224 [2023-09-01 02:16:27,625 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3112 transitions. [2023-09-01 02:16:27,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3112 transitions. [2023-09-01 02:16:27,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:27,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3112 transitions. [2023-09-01 02:16:27,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 259.3333333333333) internal successors, (3112), 12 states have internal predecessors, (3112), 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 02:16:27,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 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 02:16:27,633 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 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 02:16:27,633 INFO L175 Difference]: Start difference. First operand has 210 places, 427 transitions, 8961 flow. Second operand 12 states and 3112 transitions. [2023-09-01 02:16:27,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 723 transitions, 12672 flow [2023-09-01 02:16:34,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 723 transitions, 12672 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:16:34,332 INFO L231 Difference]: Finished difference. Result has 227 places, 477 transitions, 11012 flow [2023-09-01 02:16:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=8896, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11012, PETRI_PLACES=227, PETRI_TRANSITIONS=477} [2023-09-01 02:16:34,333 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 104 predicate places. [2023-09-01 02:16:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 477 transitions, 11012 flow [2023-09-01 02:16:34,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 235.28571428571428) internal successors, (1647), 7 states have internal predecessors, (1647), 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 02:16:34,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:34,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:16:34,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 02:16:34,334 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:34,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1038417261, now seen corresponding path program 1 times [2023-09-01 02:16:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688834596] [2023-09-01 02:16:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:34,472 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 02:16:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688834596] [2023-09-01 02:16:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688834596] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:16:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246926673] [2023-09-01 02:16:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:16:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:16:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:16:34,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 488 [2023-09-01 02:16:34,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 477 transitions, 11012 flow. Second operand has 6 states, 6 states have (on average 239.16666666666666) internal successors, (1435), 6 states have internal predecessors, (1435), 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 02:16:34,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:34,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 488 [2023-09-01 02:16:34,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:06,783 INFO L130 PetriNetUnfolder]: 143101/218885 cut-off events. [2023-09-01 02:17:06,784 INFO L131 PetriNetUnfolder]: For 1172239/1173229 co-relation queries the response was YES. [2023-09-01 02:17:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631918 conditions, 218885 events. 143101/218885 cut-off events. For 1172239/1173229 co-relation queries the response was YES. Maximal size of possible extension queue 8016. Compared 1988555 event pairs, 48549 based on Foata normal form. 338/170107 useless extension candidates. Maximal degree in co-relation 631867. Up to 68242 conditions per place. [2023-09-01 02:17:09,799 INFO L137 encePairwiseOnDemand]: 478/488 looper letters, 452 selfloop transitions, 126 changer transitions 0/660 dead transitions. [2023-09-01 02:17:09,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 660 transitions, 14183 flow [2023-09-01 02:17:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:17:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:17:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1614 transitions. [2023-09-01 02:17:09,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512295081967213 [2023-09-01 02:17:09,802 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1614 transitions. [2023-09-01 02:17:09,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1614 transitions. [2023-09-01 02:17:09,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:09,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1614 transitions. [2023-09-01 02:17:09,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 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 02:17:09,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:17:09,805 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 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 02:17:09,805 INFO L175 Difference]: Start difference. First operand has 227 places, 477 transitions, 11012 flow. Second operand 6 states and 1614 transitions. [2023-09-01 02:17:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 660 transitions, 14183 flow [2023-09-01 02:17:29,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 660 transitions, 14094 flow, removed 37 selfloop flow, removed 1 redundant places. [2023-09-01 02:17:29,089 INFO L231 Difference]: Finished difference. Result has 234 places, 527 transitions, 12969 flow [2023-09-01 02:17:29,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=10938, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12969, PETRI_PLACES=234, PETRI_TRANSITIONS=527} [2023-09-01 02:17:29,090 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 111 predicate places. [2023-09-01 02:17:29,090 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 527 transitions, 12969 flow [2023-09-01 02:17:29,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.16666666666666) internal successors, (1435), 6 states have internal predecessors, (1435), 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 02:17:29,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:29,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:17:29,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 02:17:29,091 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:17:29,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1420864703, now seen corresponding path program 3 times [2023-09-01 02:17:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:17:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897842698] [2023-09-01 02:17:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:17:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:29,275 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 02:17:29,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:17:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897842698] [2023-09-01 02:17:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897842698] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:29,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:29,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:17:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302308977] [2023-09-01 02:17:29,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:17:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:17:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:17:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:17:29,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 488 [2023-09-01 02:17:29,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 527 transitions, 12969 flow. Second operand has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 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 02:17:29,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:29,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 488 [2023-09-01 02:17:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand