./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 00:47:31,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 00:47:31,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 00:47:31,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 00:47:31,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 00:47:31,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 00:47:31,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 00:47:31,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 00:47:31,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 00:47:31,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 00:47:31,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 00:47:31,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 00:47:31,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 00:47:31,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 00:47:31,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 00:47:31,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 00:47:31,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 00:47:31,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 00:47:31,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 00:47:31,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 00:47:31,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 00:47:31,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 00:47:31,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 00:47:31,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 00:47:31,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 00:47:31,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 00:47:31,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 00:47:31,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 00:47:31,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 00:47:31,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 00:47:31,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 00:47:31,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 00:47:31,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 00:47:31,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 00:47:31,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 00:47:31,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 00:47:31,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 00:47:31,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 00:47:31,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 00:47:31,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 00:47:31,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 00:47:31,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 00:47:31,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 00:47:31,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 00:47:31,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 00:47:31,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 00:47:31,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 00:47:31,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 00:47:31,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 00:47:31,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 00:47:31,457 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 00:47:31,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 00:47:31,458 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 00:47:31,458 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 00:47:31,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 00:47:31,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 00:47:31,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 00:47:31,459 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 00:47:31,459 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 00:47:31,459 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 00:47:31,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 00:47:31,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 00:47:31,460 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 00:47:31,460 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 00:47:31,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 00:47:31,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 00:47:31,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 00:47:31,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:47:31,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 00:47:31,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 00:47:31,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 00:47:31,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 00:47:31,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 00:47:31,462 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 00:47:31,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 00:47:31,462 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 00:47:31,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 00:47:31,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 00:47:31,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 00:47:31,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 00:47:31,787 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 00:47:31,787 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 00:47:31,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 00:47:32,842 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 00:47:33,062 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 00:47:33,062 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-30 00:47:33,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49ee8293/2974bffdec804402b4d0a81f220a6582/FLAG33918759f [2023-08-30 00:47:33,078 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49ee8293/2974bffdec804402b4d0a81f220a6582 [2023-08-30 00:47:33,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 00:47:33,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 00:47:33,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 00:47:33,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 00:47:33,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 00:47:33,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c835ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33, skipping insertion in model container [2023-08-30 00:47:33,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 00:47:33,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 00:47:33,226 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/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 00:47:33,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:47:33,237 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 00:47:33,274 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/popl20-mult-equiv.wvr.c[2591,2604] [2023-08-30 00:47:33,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 00:47:33,282 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:47:33,283 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 00:47:33,288 INFO L208 MainTranslator]: Completed translation [2023-08-30 00:47:33,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33 WrapperNode [2023-08-30 00:47:33,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 00:47:33,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 00:47:33,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 00:47:33,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 00:47:33,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,333 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-30 00:47:33,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 00:47:33,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 00:47:33,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 00:47:33,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 00:47:33,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,371 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 00:47:33,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 00:47:33,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 00:47:33,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 00:47:33,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (1/1) ... [2023-08-30 00:47:33,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 00:47:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:33,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 00:47:33,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 00:47:33,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 00:47:33,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 00:47:33,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 00:47:33,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 00:47:33,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 00:47:33,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 00:47:33,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 00:47:33,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 00:47:33,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 00:47:33,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 00:47:33,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 00:47:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 00:47:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 00:47:33,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 00:47:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 00:47:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 00:47:33,454 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 00:47:33,569 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 00:47:33,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 00:47:33,829 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 00:47:33,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 00:47:33,882 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 00:47:33,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:47:33 BoogieIcfgContainer [2023-08-30 00:47:33,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 00:47:33,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 00:47:33,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 00:47:33,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 00:47:33,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 12:47:33" (1/3) ... [2023-08-30 00:47:33,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25362317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:47:33, skipping insertion in model container [2023-08-30 00:47:33,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 12:47:33" (2/3) ... [2023-08-30 00:47:33,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25362317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 12:47:33, skipping insertion in model container [2023-08-30 00:47:33,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 12:47:33" (3/3) ... [2023-08-30 00:47:33,894 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-30 00:47:33,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 00:47:33,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-30 00:47:33,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 00:47:33,985 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 00:47:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 00:47:34,094 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2023-08-30 00:47:34,095 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:34,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 00:47:34,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 244 flow [2023-08-30 00:47:34,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 224 flow [2023-08-30 00:47:34,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 00:47:34,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-30 00:47:34,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-30 00:47:34,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 224 flow [2023-08-30 00:47:34,170 INFO L130 PetriNetUnfolder]: 7/103 cut-off events. [2023-08-30 00:47:34,171 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:34,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 7/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-08-30 00:47:34,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 1124 [2023-08-30 00:47:37,412 INFO L134 LiptonReduction]: Checked pairs total: 1820 [2023-08-30 00:47:37,413 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 00:47:37,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 00:47:37,429 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;@267bd535, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 00:47:37,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-30 00:47:37,431 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 00:47:37,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 00:47:37,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:37,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 00:47:37,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:37,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 430, now seen corresponding path program 1 times [2023-08-30 00:47:37,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:37,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666857927] [2023-08-30 00:47:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666857927] [2023-08-30 00:47:37,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666857927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:37,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 00:47:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593307764] [2023-08-30 00:47:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 00:47:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 00:47:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 00:47:37,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 205 [2023-08-30 00:47:37,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:37,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 205 [2023-08-30 00:47:37,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:37,666 INFO L130 PetriNetUnfolder]: 259/418 cut-off events. [2023-08-30 00:47:37,666 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 00:47:37,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 418 events. 259/418 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1804 event pairs, 203 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 684. Up to 411 conditions per place. [2023-08-30 00:47:37,672 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 29 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-08-30 00:47:37,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 142 flow [2023-08-30 00:47:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 00:47:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 00:47:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 224 transitions. [2023-08-30 00:47:37,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2023-08-30 00:47:37,684 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 224 transitions. [2023-08-30 00:47:37,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 224 transitions. [2023-08-30 00:47:37,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:37,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 224 transitions. [2023-08-30 00:47:37,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,694 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,695 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 2 states and 224 transitions. [2023-08-30 00:47:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 142 flow [2023-08-30 00:47:37,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 00:47:37,700 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 72 flow [2023-08-30 00:47:37,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-30 00:47:37,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-30 00:47:37,704 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 72 flow [2023-08-30 00:47:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:37,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:47:37,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 00:47:37,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:37,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 423839, now seen corresponding path program 1 times [2023-08-30 00:47:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63818940] [2023-08-30 00:47:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:37,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63818940] [2023-08-30 00:47:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63818940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:37,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:37,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511603085] [2023-08-30 00:47:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:37,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 00:47:37,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:37,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 00:47:37,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:37,972 INFO L130 PetriNetUnfolder]: 247/397 cut-off events. [2023-08-30 00:47:37,972 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 397 events. 247/397 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1665 event pairs, 194 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 799. Up to 389 conditions per place. [2023-08-30 00:47:37,975 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 00:47:37,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 122 flow [2023-08-30 00:47:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-30 00:47:37,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 00:47:37,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-30 00:47:37,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-30 00:47:37,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:37,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-30 00:47:37,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,983 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 72 flow. Second operand 3 states and 287 transitions. [2023-08-30 00:47:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 122 flow [2023-08-30 00:47:37,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:37,984 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 70 flow [2023-08-30 00:47:37,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 00:47:37,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-30 00:47:37,985 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 70 flow [2023-08-30 00:47:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:37,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:37,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 00:47:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 00:47:37,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:37,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash 423840, now seen corresponding path program 1 times [2023-08-30 00:47:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682136317] [2023-08-30 00:47:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:37,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:38,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:38,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682136317] [2023-08-30 00:47:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682136317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:38,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:38,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:38,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463976382] [2023-08-30 00:47:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:38,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-30 00:47:38,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:38,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-30 00:47:38,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:38,214 INFO L130 PetriNetUnfolder]: 235/376 cut-off events. [2023-08-30 00:47:38,215 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:38,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 376 events. 235/376 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1582 event pairs, 185 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 758. Up to 368 conditions per place. [2023-08-30 00:47:38,217 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 00:47:38,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2023-08-30 00:47:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-30 00:47:38,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2023-08-30 00:47:38,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-30 00:47:38,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-30 00:47:38,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:38,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-30 00:47:38,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,226 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 70 flow. Second operand 3 states and 300 transitions. [2023-08-30 00:47:38,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2023-08-30 00:47:38,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:38,228 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 67 flow [2023-08-30 00:47:38,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-30 00:47:38,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-30 00:47:38,232 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 67 flow [2023-08-30 00:47:38,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:47:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 00:47:38,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:38,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 407320979, now seen corresponding path program 1 times [2023-08-30 00:47:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68278534] [2023-08-30 00:47:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:38,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:38,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68278534] [2023-08-30 00:47:38,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68278534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:38,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:38,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:38,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912166976] [2023-08-30 00:47:38,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:38,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 00:47:38,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:38,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 00:47:38,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:38,405 INFO L130 PetriNetUnfolder]: 221/351 cut-off events. [2023-08-30 00:47:38,405 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:38,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 351 events. 221/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1431 event pairs, 172 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 709. Up to 343 conditions per place. [2023-08-30 00:47:38,409 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 22 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-30 00:47:38,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 109 flow [2023-08-30 00:47:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-30 00:47:38,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46016260162601624 [2023-08-30 00:47:38,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-30 00:47:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-30 00:47:38,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:38,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-30 00:47:38,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,414 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 67 flow. Second operand 3 states and 283 transitions. [2023-08-30 00:47:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 109 flow [2023-08-30 00:47:38,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:38,415 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 64 flow [2023-08-30 00:47:38,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-08-30 00:47:38,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2023-08-30 00:47:38,416 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 64 flow [2023-08-30 00:47:38,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 00:47:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 00:47:38,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:38,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 407320978, now seen corresponding path program 1 times [2023-08-30 00:47:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252521248] [2023-08-30 00:47:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:38,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:38,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252521248] [2023-08-30 00:47:38,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252521248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:38,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:38,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256020778] [2023-08-30 00:47:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:38,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:38,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-30 00:47:38,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:38,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-30 00:47:38,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:38,603 INFO L130 PetriNetUnfolder]: 207/326 cut-off events. [2023-08-30 00:47:38,604 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:38,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 326 events. 207/326 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1284 event pairs, 159 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 660. Up to 318 conditions per place. [2023-08-30 00:47:38,608 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 20 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 00:47:38,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 102 flow [2023-08-30 00:47:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-30 00:47:38,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813008130081301 [2023-08-30 00:47:38,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-30 00:47:38,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-30 00:47:38,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:38,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-30 00:47:38,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,612 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 64 flow. Second operand 3 states and 296 transitions. [2023-08-30 00:47:38,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 102 flow [2023-08-30 00:47:38,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:38,614 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 61 flow [2023-08-30 00:47:38,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-30 00:47:38,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 00:47:38,616 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 61 flow [2023-08-30 00:47:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:38,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 00:47:38,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:38,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 593447536, now seen corresponding path program 1 times [2023-08-30 00:47:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184657340] [2023-08-30 00:47:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:38,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184657340] [2023-08-30 00:47:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184657340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:38,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 00:47:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367560350] [2023-08-30 00:47:38,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:38,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 205 [2023-08-30 00:47:38,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:38,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 205 [2023-08-30 00:47:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:38,859 INFO L130 PetriNetUnfolder]: 165/266 cut-off events. [2023-08-30 00:47:38,860 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:38,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 266 events. 165/266 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 999 event pairs, 126 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 541. Up to 258 conditions per place. [2023-08-30 00:47:38,861 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 19 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 00:47:38,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 99 flow [2023-08-30 00:47:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-30 00:47:38,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2023-08-30 00:47:38,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-30 00:47:38,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-30 00:47:38,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:38,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-30 00:47:38,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,865 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 61 flow. Second operand 3 states and 255 transitions. [2023-08-30 00:47:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 99 flow [2023-08-30 00:47:38,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:38,866 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 60 flow [2023-08-30 00:47:38,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-30 00:47:38,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 00:47:38,867 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 60 flow [2023-08-30 00:47:38,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 00:47:38,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:38,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 593447537, now seen corresponding path program 1 times [2023-08-30 00:47:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255173604] [2023-08-30 00:47:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:38,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255173604] [2023-08-30 00:47:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255173604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:38,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:38,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:38,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481288792] [2023-08-30 00:47:38,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:38,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:38,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:38,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:38,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:38,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:38,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:38,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:38,961 INFO L130 PetriNetUnfolder]: 123/206 cut-off events. [2023-08-30 00:47:38,961 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 00:47:38,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 206 events. 123/206 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 720 event pairs, 93 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 422. Up to 198 conditions per place. [2023-08-30 00:47:38,962 INFO L137 encePairwiseOnDemand]: 203/205 looper letters, 18 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-30 00:47:38,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 96 flow [2023-08-30 00:47:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-08-30 00:47:38,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45691056910569106 [2023-08-30 00:47:38,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-08-30 00:47:38,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-08-30 00:47:38,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:38,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-08-30 00:47:38,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,966 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 60 flow. Second operand 3 states and 281 transitions. [2023-08-30 00:47:38,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 96 flow [2023-08-30 00:47:38,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:38,967 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 59 flow [2023-08-30 00:47:38,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-30 00:47:38,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-30 00:47:38,968 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 59 flow [2023-08-30 00:47:38,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:38,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:38,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:38,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 00:47:38,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:38,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash -578122106, now seen corresponding path program 1 times [2023-08-30 00:47:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:38,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124000718] [2023-08-30 00:47:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:39,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:39,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124000718] [2023-08-30 00:47:39,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124000718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:39,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:39,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 00:47:39,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929638544] [2023-08-30 00:47:39,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:39,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 00:47:39,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 00:47:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 00:47:39,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 205 [2023-08-30 00:47:39,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:39,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 205 [2023-08-30 00:47:39,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:39,213 INFO L130 PetriNetUnfolder]: 271/426 cut-off events. [2023-08-30 00:47:39,213 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 00:47:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 426 events. 271/426 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1513 event pairs, 37 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 836. Up to 309 conditions per place. [2023-08-30 00:47:39,215 INFO L137 encePairwiseOnDemand]: 200/205 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-30 00:47:39,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 166 flow [2023-08-30 00:47:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 00:47:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 00:47:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-30 00:47:39,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2023-08-30 00:47:39,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-30 00:47:39,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-30 00:47:39,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:39,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-30 00:47:39,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,219 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 59 flow. Second operand 3 states and 324 transitions. [2023-08-30 00:47:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 166 flow [2023-08-30 00:47:39,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:39,220 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 84 flow [2023-08-30 00:47:39,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 00:47:39,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-30 00:47:39,221 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 84 flow [2023-08-30 00:47:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:39,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:39,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 00:47:39,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:39,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash -684329553, now seen corresponding path program 1 times [2023-08-30 00:47:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584332961] [2023-08-30 00:47:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:39,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584332961] [2023-08-30 00:47:39,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584332961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:39,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:39,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:47:39,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934337796] [2023-08-30 00:47:39,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:39,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:47:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:47:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 00:47:39,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:39,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:39,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:39,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:39,734 INFO L130 PetriNetUnfolder]: 405/626 cut-off events. [2023-08-30 00:47:39,734 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2023-08-30 00:47:39,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 626 events. 405/626 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2478 event pairs, 23 based on Foata normal form. 32/648 useless extension candidates. Maximal degree in co-relation 1490. Up to 229 conditions per place. [2023-08-30 00:47:39,738 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 67 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2023-08-30 00:47:39,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 88 transitions, 423 flow [2023-08-30 00:47:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:47:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:47:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 869 transitions. [2023-08-30 00:47:39,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47100271002710026 [2023-08-30 00:47:39,741 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 869 transitions. [2023-08-30 00:47:39,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 869 transitions. [2023-08-30 00:47:39,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:39,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 869 transitions. [2023-08-30 00:47:39,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.55555555555556) internal successors, (869), 9 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,747 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,747 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 84 flow. Second operand 9 states and 869 transitions. [2023-08-30 00:47:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 88 transitions, 423 flow [2023-08-30 00:47:39,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 88 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:39,749 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 219 flow [2023-08-30 00:47:39,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=219, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 00:47:39,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2023-08-30 00:47:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 219 flow [2023-08-30 00:47:39,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:39,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:39,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 00:47:39,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:39,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1435029477, now seen corresponding path program 2 times [2023-08-30 00:47:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059908579] [2023-08-30 00:47:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:39,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:39,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059908579] [2023-08-30 00:47:39,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059908579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:39,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:39,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:39,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320001673] [2023-08-30 00:47:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:39,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:39,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:39,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:39,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:39,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:39,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:40,178 INFO L130 PetriNetUnfolder]: 617/958 cut-off events. [2023-08-30 00:47:40,178 INFO L131 PetriNetUnfolder]: For 1455/1461 co-relation queries the response was YES. [2023-08-30 00:47:40,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 958 events. 617/958 cut-off events. For 1455/1461 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4216 event pairs, 21 based on Foata normal form. 20/968 useless extension candidates. Maximal degree in co-relation 3138. Up to 348 conditions per place. [2023-08-30 00:47:40,184 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 72 selfloop transitions, 15 changer transitions 3/92 dead transitions. [2023-08-30 00:47:40,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 92 transitions, 572 flow [2023-08-30 00:47:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 603 transitions. [2023-08-30 00:47:40,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902439024390244 [2023-08-30 00:47:40,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 603 transitions. [2023-08-30 00:47:40,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 603 transitions. [2023-08-30 00:47:40,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:40,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 603 transitions. [2023-08-30 00:47:40,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.5) internal successors, (603), 6 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:40,191 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:40,191 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 219 flow. Second operand 6 states and 603 transitions. [2023-08-30 00:47:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 92 transitions, 572 flow [2023-08-30 00:47:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 568 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:40,197 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 290 flow [2023-08-30 00:47:40,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-30 00:47:40,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-30 00:47:40,198 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 290 flow [2023-08-30 00:47:40,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:40,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 00:47:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 00:47:40,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:40,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1558720693, now seen corresponding path program 3 times [2023-08-30 00:47:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:40,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207153431] [2023-08-30 00:47:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207153431] [2023-08-30 00:47:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207153431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095266726] [2023-08-30 00:47:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:40,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 00:47:40,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:40,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 00:47:40,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:40,544 INFO L130 PetriNetUnfolder]: 720/1121 cut-off events. [2023-08-30 00:47:40,544 INFO L131 PetriNetUnfolder]: For 3019/3041 co-relation queries the response was YES. [2023-08-30 00:47:40,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 1121 events. 720/1121 cut-off events. For 3019/3041 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5082 event pairs, 107 based on Foata normal form. 28/1127 useless extension candidates. Maximal degree in co-relation 4166. Up to 799 conditions per place. [2023-08-30 00:47:40,553 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 57 selfloop transitions, 18 changer transitions 3/80 dead transitions. [2023-08-30 00:47:40,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 619 flow [2023-08-30 00:47:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 588 transitions. [2023-08-30 00:47:40,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2023-08-30 00:47:40,567 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 588 transitions. [2023-08-30 00:47:40,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 588 transitions. [2023-08-30 00:47:40,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:40,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 588 transitions. [2023-08-30 00:47:40,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.0) internal successors, (588), 6 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:40,571 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:40,571 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 290 flow. Second operand 6 states and 588 transitions. [2023-08-30 00:47:40,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 619 flow [2023-08-30 00:47:40,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 601 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:40,579 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 397 flow [2023-08-30 00:47:40,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-30 00:47:40,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2023-08-30 00:47:40,580 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 397 flow [2023-08-30 00:47:40,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:40,581 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] [2023-08-30 00:47:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 00:47:40,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:40,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash -18309602, now seen corresponding path program 1 times [2023-08-30 00:47:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:40,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363116593] [2023-08-30 00:47:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:40,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363116593] [2023-08-30 00:47:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363116593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:47:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337243146] [2023-08-30 00:47:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:40,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 00:47:40,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:40,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:40,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 00:47:40,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:41,093 INFO L130 PetriNetUnfolder]: 1150/1833 cut-off events. [2023-08-30 00:47:41,094 INFO L131 PetriNetUnfolder]: For 6869/6869 co-relation queries the response was YES. [2023-08-30 00:47:41,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7348 conditions, 1833 events. 1150/1833 cut-off events. For 6869/6869 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8632 event pairs, 369 based on Foata normal form. 38/1871 useless extension candidates. Maximal degree in co-relation 7330. Up to 1027 conditions per place. [2023-08-30 00:47:41,108 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 71 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2023-08-30 00:47:41,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 794 flow [2023-08-30 00:47:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:47:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:47:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-08-30 00:47:41,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49365853658536585 [2023-08-30 00:47:41,110 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-08-30 00:47:41,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-08-30 00:47:41,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:41,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-08-30 00:47:41,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,128 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 397 flow. Second operand 5 states and 506 transitions. [2023-08-30 00:47:41,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 794 flow [2023-08-30 00:47:41,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 757 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:41,145 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 515 flow [2023-08-30 00:47:41,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-30 00:47:41,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2023-08-30 00:47:41,147 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 515 flow [2023-08-30 00:47:41,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:41,147 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] [2023-08-30 00:47:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 00:47:41,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:41,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -293890740, now seen corresponding path program 2 times [2023-08-30 00:47:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:41,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070215098] [2023-08-30 00:47:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:41,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:41,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070215098] [2023-08-30 00:47:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070215098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:41,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:41,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:47:41,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170840556] [2023-08-30 00:47:41,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:41,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:41,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:41,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:41,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:41,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:41,846 INFO L130 PetriNetUnfolder]: 1528/2436 cut-off events. [2023-08-30 00:47:41,846 INFO L131 PetriNetUnfolder]: For 15179/15179 co-relation queries the response was YES. [2023-08-30 00:47:41,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11221 conditions, 2436 events. 1528/2436 cut-off events. For 15179/15179 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12459 event pairs, 252 based on Foata normal form. 28/2464 useless extension candidates. Maximal degree in co-relation 11200. Up to 994 conditions per place. [2023-08-30 00:47:41,864 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 112 selfloop transitions, 62 changer transitions 9/183 dead transitions. [2023-08-30 00:47:41,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 183 transitions, 1980 flow [2023-08-30 00:47:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 597 transitions. [2023-08-30 00:47:41,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2023-08-30 00:47:41,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 597 transitions. [2023-08-30 00:47:41,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 597 transitions. [2023-08-30 00:47:41,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:41,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 597 transitions. [2023-08-30 00:47:41,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:41,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:41,871 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 515 flow. Second operand 6 states and 597 transitions. [2023-08-30 00:47:41,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 183 transitions, 1980 flow [2023-08-30 00:47:41,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 1872 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:41,914 INFO L231 Difference]: Finished difference. Result has 74 places, 114 transitions, 1344 flow [2023-08-30 00:47:41,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1344, PETRI_PLACES=74, PETRI_TRANSITIONS=114} [2023-08-30 00:47:41,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2023-08-30 00:47:41,915 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 114 transitions, 1344 flow [2023-08-30 00:47:41,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:41,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:41,915 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] [2023-08-30 00:47:41,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 00:47:41,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:41,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash -727404288, now seen corresponding path program 1 times [2023-08-30 00:47:41,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:41,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127608294] [2023-08-30 00:47:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:42,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:42,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127608294] [2023-08-30 00:47:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127608294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:42,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823816021] [2023-08-30 00:47:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:42,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:42,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 114 transitions, 1344 flow. Second operand has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:42,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:42,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:42,492 INFO L130 PetriNetUnfolder]: 1598/2577 cut-off events. [2023-08-30 00:47:42,493 INFO L131 PetriNetUnfolder]: For 18880/19095 co-relation queries the response was YES. [2023-08-30 00:47:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13882 conditions, 2577 events. 1598/2577 cut-off events. For 18880/19095 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13830 event pairs, 235 based on Foata normal form. 307/2874 useless extension candidates. Maximal degree in co-relation 13857. Up to 1829 conditions per place. [2023-08-30 00:47:42,516 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 139 selfloop transitions, 22 changer transitions 5/170 dead transitions. [2023-08-30 00:47:42,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 170 transitions, 2167 flow [2023-08-30 00:47:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:47:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:47:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 496 transitions. [2023-08-30 00:47:42,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48390243902439023 [2023-08-30 00:47:42,519 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 496 transitions. [2023-08-30 00:47:42,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 496 transitions. [2023-08-30 00:47:42,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:42,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 496 transitions. [2023-08-30 00:47:42,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.2) internal successors, (496), 5 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,523 INFO L175 Difference]: Start difference. First operand has 74 places, 114 transitions, 1344 flow. Second operand 5 states and 496 transitions. [2023-08-30 00:47:42,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 170 transitions, 2167 flow [2023-08-30 00:47:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 170 transitions, 2167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:42,565 INFO L231 Difference]: Finished difference. Result has 79 places, 117 transitions, 1434 flow [2023-08-30 00:47:42,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1434, PETRI_PLACES=79, PETRI_TRANSITIONS=117} [2023-08-30 00:47:42,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2023-08-30 00:47:42,566 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 117 transitions, 1434 flow [2023-08-30 00:47:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:42,566 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] [2023-08-30 00:47:42,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 00:47:42,566 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:42,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1318677548, now seen corresponding path program 3 times [2023-08-30 00:47:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:42,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452871402] [2023-08-30 00:47:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:42,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452871402] [2023-08-30 00:47:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452871402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:42,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:42,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 00:47:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78176904] [2023-08-30 00:47:42,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:42,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:42,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:42,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:42,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 117 transitions, 1434 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:42,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:42,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:42,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:43,347 INFO L130 PetriNetUnfolder]: 1936/3114 cut-off events. [2023-08-30 00:47:43,348 INFO L131 PetriNetUnfolder]: For 21931/21931 co-relation queries the response was YES. [2023-08-30 00:47:43,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 3114 events. 1936/3114 cut-off events. For 21931/21931 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16620 event pairs, 519 based on Foata normal form. 34/3148 useless extension candidates. Maximal degree in co-relation 16769. Up to 1594 conditions per place. [2023-08-30 00:47:43,376 INFO L137 encePairwiseOnDemand]: 197/205 looper letters, 90 selfloop transitions, 86 changer transitions 7/183 dead transitions. [2023-08-30 00:47:43,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 183 transitions, 2263 flow [2023-08-30 00:47:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 596 transitions. [2023-08-30 00:47:43,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2023-08-30 00:47:43,379 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 596 transitions. [2023-08-30 00:47:43,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 596 transitions. [2023-08-30 00:47:43,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:43,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 596 transitions. [2023-08-30 00:47:43,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:43,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:43,383 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:43,383 INFO L175 Difference]: Start difference. First operand has 79 places, 117 transitions, 1434 flow. Second operand 6 states and 596 transitions. [2023-08-30 00:47:43,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 183 transitions, 2263 flow [2023-08-30 00:47:43,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 183 transitions, 2237 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 00:47:43,480 INFO L231 Difference]: Finished difference. Result has 86 places, 126 transitions, 1809 flow [2023-08-30 00:47:43,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1809, PETRI_PLACES=86, PETRI_TRANSITIONS=126} [2023-08-30 00:47:43,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2023-08-30 00:47:43,481 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 126 transitions, 1809 flow [2023-08-30 00:47:43,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:43,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:43,482 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] [2023-08-30 00:47:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 00:47:43,482 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:43,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1610920218, now seen corresponding path program 4 times [2023-08-30 00:47:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585969213] [2023-08-30 00:47:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:43,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585969213] [2023-08-30 00:47:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585969213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:43,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065961006] [2023-08-30 00:47:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:47:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:43,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 00:47:43,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:47:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:47:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 00:47:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:43,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065961006] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:44,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 00:47:44,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-08-30 00:47:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348168835] [2023-08-30 00:47:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:44,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 00:47:44,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 00:47:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:47:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:47:44,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 126 transitions, 1809 flow. Second operand has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:44,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:44,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:47:44,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:44,994 INFO L130 PetriNetUnfolder]: 3322/5411 cut-off events. [2023-08-30 00:47:44,995 INFO L131 PetriNetUnfolder]: For 47678/47678 co-relation queries the response was YES. [2023-08-30 00:47:45,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31615 conditions, 5411 events. 3322/5411 cut-off events. For 47678/47678 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32867 event pairs, 277 based on Foata normal form. 28/5439 useless extension candidates. Maximal degree in co-relation 31585. Up to 1684 conditions per place. [2023-08-30 00:47:45,046 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 130 selfloop transitions, 167 changer transitions 1/298 dead transitions. [2023-08-30 00:47:45,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 298 transitions, 4314 flow [2023-08-30 00:47:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 00:47:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 00:47:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2023-08-30 00:47:45,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2023-08-30 00:47:45,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2023-08-30 00:47:45,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2023-08-30 00:47:45,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:45,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2023-08-30 00:47:45,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:45,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 205.0) internal successors, (1640), 8 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:45,054 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 205.0) internal successors, (1640), 8 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:45,055 INFO L175 Difference]: Start difference. First operand has 86 places, 126 transitions, 1809 flow. Second operand 7 states and 680 transitions. [2023-08-30 00:47:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 298 transitions, 4314 flow [2023-08-30 00:47:45,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 298 transitions, 4306 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:45,175 INFO L231 Difference]: Finished difference. Result has 98 places, 218 transitions, 3884 flow [2023-08-30 00:47:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3884, PETRI_PLACES=98, PETRI_TRANSITIONS=218} [2023-08-30 00:47:45,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2023-08-30 00:47:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 218 transitions, 3884 flow [2023-08-30 00:47:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:45,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:45,176 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] [2023-08-30 00:47:45,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:45,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 00:47:45,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:45,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1335640178, now seen corresponding path program 5 times [2023-08-30 00:47:45,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:45,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101032280] [2023-08-30 00:47:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:45,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101032280] [2023-08-30 00:47:45,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101032280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:45,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911312205] [2023-08-30 00:47:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 00:47:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:45,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:45,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 00:47:45,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:47:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:47:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:47:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:46,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911312205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:46,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-30 00:47:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029697731] [2023-08-30 00:47:46,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:46,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 00:47:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:46,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 00:47:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-30 00:47:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 205 [2023-08-30 00:47:46,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 218 transitions, 3884 flow. Second operand has 13 states, 13 states have (on average 87.61538461538461) internal successors, (1139), 13 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:46,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:46,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 205 [2023-08-30 00:47:46,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:47,815 INFO L130 PetriNetUnfolder]: 4704/7488 cut-off events. [2023-08-30 00:47:47,815 INFO L131 PetriNetUnfolder]: For 95389/95389 co-relation queries the response was YES. [2023-08-30 00:47:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51511 conditions, 7488 events. 4704/7488 cut-off events. For 95389/95389 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45748 event pairs, 303 based on Foata normal form. 89/7577 useless extension candidates. Maximal degree in co-relation 51475. Up to 2387 conditions per place. [2023-08-30 00:47:47,988 INFO L137 encePairwiseOnDemand]: 194/205 looper letters, 190 selfloop transitions, 268 changer transitions 22/480 dead transitions. [2023-08-30 00:47:48,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 480 transitions, 7762 flow [2023-08-30 00:47:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 00:47:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 00:47:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1545 transitions. [2023-08-30 00:47:48,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47103658536585363 [2023-08-30 00:47:48,012 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1545 transitions. [2023-08-30 00:47:48,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1545 transitions. [2023-08-30 00:47:48,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:48,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1545 transitions. [2023-08-30 00:47:48,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 96.5625) internal successors, (1545), 16 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:48,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:48,022 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 205.0) internal successors, (3485), 17 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:48,022 INFO L175 Difference]: Start difference. First operand has 98 places, 218 transitions, 3884 flow. Second operand 16 states and 1545 transitions. [2023-08-30 00:47:48,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 480 transitions, 7762 flow [2023-08-30 00:47:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 480 transitions, 7662 flow, removed 50 selfloop flow, removed 0 redundant places. [2023-08-30 00:47:48,413 INFO L231 Difference]: Finished difference. Result has 122 places, 322 transitions, 6668 flow [2023-08-30 00:47:48,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6668, PETRI_PLACES=122, PETRI_TRANSITIONS=322} [2023-08-30 00:47:48,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2023-08-30 00:47:48,414 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 322 transitions, 6668 flow [2023-08-30 00:47:48,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 87.61538461538461) internal successors, (1139), 13 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:48,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:48,418 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] [2023-08-30 00:47:48,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:48,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 00:47:48,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:48,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash -286692026, now seen corresponding path program 6 times [2023-08-30 00:47:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207700376] [2023-08-30 00:47:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207700376] [2023-08-30 00:47:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207700376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199239687] [2023-08-30 00:47:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:48,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:48,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 00:47:48,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 322 transitions, 6668 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:48,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:48,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 00:47:48,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:50,449 INFO L130 PetriNetUnfolder]: 4887/7820 cut-off events. [2023-08-30 00:47:50,450 INFO L131 PetriNetUnfolder]: For 141148/141171 co-relation queries the response was YES. [2023-08-30 00:47:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60274 conditions, 7820 events. 4887/7820 cut-off events. For 141148/141171 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47976 event pairs, 1035 based on Foata normal form. 246/8066 useless extension candidates. Maximal degree in co-relation 60229. Up to 5721 conditions per place. [2023-08-30 00:47:50,521 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 219 selfloop transitions, 40 changer transitions 13/405 dead transitions. [2023-08-30 00:47:50,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 405 transitions, 8388 flow [2023-08-30 00:47:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:47:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:47:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2023-08-30 00:47:50,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49073170731707316 [2023-08-30 00:47:50,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2023-08-30 00:47:50,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2023-08-30 00:47:50,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:50,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2023-08-30 00:47:50,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:50,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:50,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:50,528 INFO L175 Difference]: Start difference. First operand has 122 places, 322 transitions, 6668 flow. Second operand 5 states and 503 transitions. [2023-08-30 00:47:50,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 405 transitions, 8388 flow [2023-08-30 00:47:50,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 405 transitions, 8151 flow, removed 57 selfloop flow, removed 4 redundant places. [2023-08-30 00:47:50,902 INFO L231 Difference]: Finished difference. Result has 124 places, 335 transitions, 6810 flow [2023-08-30 00:47:50,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6810, PETRI_PLACES=124, PETRI_TRANSITIONS=335} [2023-08-30 00:47:50,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2023-08-30 00:47:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 335 transitions, 6810 flow [2023-08-30 00:47:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:50,903 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] [2023-08-30 00:47:50,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 00:47:50,903 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:50,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1279838736, now seen corresponding path program 7 times [2023-08-30 00:47:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:50,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755864824] [2023-08-30 00:47:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:51,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:51,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755864824] [2023-08-30 00:47:51,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755864824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:51,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231151820] [2023-08-30 00:47:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:51,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:51,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:51,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 205 [2023-08-30 00:47:51,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 335 transitions, 6810 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:51,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:51,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 205 [2023-08-30 00:47:51,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:52,357 INFO L130 PetriNetUnfolder]: 4791/7619 cut-off events. [2023-08-30 00:47:52,357 INFO L131 PetriNetUnfolder]: For 137632/137670 co-relation queries the response was YES. [2023-08-30 00:47:52,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59828 conditions, 7619 events. 4791/7619 cut-off events. For 137632/137670 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46412 event pairs, 1007 based on Foata normal form. 40/7654 useless extension candidates. Maximal degree in co-relation 59782. Up to 6682 conditions per place. [2023-08-30 00:47:52,428 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 207 selfloop transitions, 21 changer transitions 18/379 dead transitions. [2023-08-30 00:47:52,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 379 transitions, 7739 flow [2023-08-30 00:47:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 00:47:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 00:47:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-08-30 00:47:52,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48097560975609754 [2023-08-30 00:47:52,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-08-30 00:47:52,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-08-30 00:47:52,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:52,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-08-30 00:47:52,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:52,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:52,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:52,434 INFO L175 Difference]: Start difference. First operand has 124 places, 335 transitions, 6810 flow. Second operand 5 states and 493 transitions. [2023-08-30 00:47:52,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 379 transitions, 7739 flow [2023-08-30 00:47:52,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 379 transitions, 7555 flow, removed 44 selfloop flow, removed 2 redundant places. [2023-08-30 00:47:52,743 INFO L231 Difference]: Finished difference. Result has 128 places, 336 transitions, 6725 flow [2023-08-30 00:47:52,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6725, PETRI_PLACES=128, PETRI_TRANSITIONS=336} [2023-08-30 00:47:52,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2023-08-30 00:47:52,744 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 336 transitions, 6725 flow [2023-08-30 00:47:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:52,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:52,744 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] [2023-08-30 00:47:52,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 00:47:52,745 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:52,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2093451750, now seen corresponding path program 8 times [2023-08-30 00:47:52,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:52,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118595497] [2023-08-30 00:47:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118595497] [2023-08-30 00:47:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118595497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 00:47:52,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 00:47:52,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 00:47:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262808473] [2023-08-30 00:47:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 00:47:52,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 00:47:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 00:47:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 00:47:52,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 205 [2023-08-30 00:47:52,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 336 transitions, 6725 flow. Second operand has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:52,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:52,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 205 [2023-08-30 00:47:52,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:54,541 INFO L130 PetriNetUnfolder]: 4928/7806 cut-off events. [2023-08-30 00:47:54,541 INFO L131 PetriNetUnfolder]: For 138753/138773 co-relation queries the response was YES. [2023-08-30 00:47:54,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61004 conditions, 7806 events. 4928/7806 cut-off events. For 138753/138773 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47387 event pairs, 1033 based on Foata normal form. 10/7815 useless extension candidates. Maximal degree in co-relation 60957. Up to 6657 conditions per place. [2023-08-30 00:47:54,623 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 217 selfloop transitions, 24 changer transitions 13/383 dead transitions. [2023-08-30 00:47:54,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 383 transitions, 7668 flow [2023-08-30 00:47:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 00:47:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 00:47:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2023-08-30 00:47:54,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772357723577236 [2023-08-30 00:47:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2023-08-30 00:47:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2023-08-30 00:47:54,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:54,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2023-08-30 00:47:54,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:54,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:54,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 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) [2023-08-30 00:47:54,630 INFO L175 Difference]: Start difference. First operand has 128 places, 336 transitions, 6725 flow. Second operand 6 states and 587 transitions. [2023-08-30 00:47:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 383 transitions, 7668 flow [2023-08-30 00:47:55,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 383 transitions, 7535 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-08-30 00:47:55,016 INFO L231 Difference]: Finished difference. Result has 128 places, 330 transitions, 6531 flow [2023-08-30 00:47:55,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6531, PETRI_PLACES=128, PETRI_TRANSITIONS=330} [2023-08-30 00:47:55,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2023-08-30 00:47:55,017 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 330 transitions, 6531 flow [2023-08-30 00:47:55,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:55,018 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] [2023-08-30 00:47:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 00:47:55,018 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:55,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash -35328729, now seen corresponding path program 1 times [2023-08-30 00:47:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154201789] [2023-08-30 00:47:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:55,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154201789] [2023-08-30 00:47:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154201789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341692733] [2023-08-30 00:47:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:55,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:55,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:55,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:55,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 00:47:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:55,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:47:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:55,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341692733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:55,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:55,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-30 00:47:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855712547] [2023-08-30 00:47:55,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 00:47:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 00:47:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 00:47:55,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 205 [2023-08-30 00:47:55,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 330 transitions, 6531 flow. Second operand has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:55,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:55,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 205 [2023-08-30 00:47:55,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:47:57,697 INFO L130 PetriNetUnfolder]: 6286/10787 cut-off events. [2023-08-30 00:47:57,697 INFO L131 PetriNetUnfolder]: For 198813/200307 co-relation queries the response was YES. [2023-08-30 00:47:57,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84121 conditions, 10787 events. 6286/10787 cut-off events. For 198813/200307 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 80650 event pairs, 313 based on Foata normal form. 694/11427 useless extension candidates. Maximal degree in co-relation 84075. Up to 5148 conditions per place. [2023-08-30 00:47:57,801 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 267 selfloop transitions, 217 changer transitions 6/636 dead transitions. [2023-08-30 00:47:57,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 636 transitions, 12866 flow [2023-08-30 00:47:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 00:47:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 00:47:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 871 transitions. [2023-08-30 00:47:57,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47208672086720865 [2023-08-30 00:47:57,805 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 871 transitions. [2023-08-30 00:47:57,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 871 transitions. [2023-08-30 00:47:57,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:47:57,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 871 transitions. [2023-08-30 00:47:57,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.77777777777777) internal successors, (871), 9 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:57,809 INFO L175 Difference]: Start difference. First operand has 128 places, 330 transitions, 6531 flow. Second operand 9 states and 871 transitions. [2023-08-30 00:47:57,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 636 transitions, 12866 flow [2023-08-30 00:47:58,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 636 transitions, 12448 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-08-30 00:47:58,339 INFO L231 Difference]: Finished difference. Result has 130 places, 516 transitions, 11049 flow [2023-08-30 00:47:58,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11049, PETRI_PLACES=130, PETRI_TRANSITIONS=516} [2023-08-30 00:47:58,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2023-08-30 00:47:58,340 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 516 transitions, 11049 flow [2023-08-30 00:47:58,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.7) internal successors, (907), 10 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:58,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:47:58,340 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] [2023-08-30 00:47:58,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 00:47:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:58,549 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:47:58,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:47:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 4874269, now seen corresponding path program 2 times [2023-08-30 00:47:58,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:47:58,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096574257] [2023-08-30 00:47:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:47:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:47:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:47:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:47:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096574257] [2023-08-30 00:47:58,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096574257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:47:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474723902] [2023-08-30 00:47:58,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:47:58,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:47:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:47:58,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:47:58,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 00:47:58,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:47:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:47:58,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:47:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:47:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:59,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:47:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:47:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474723902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:47:59,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:47:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-30 00:47:59,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791050843] [2023-08-30 00:47:59,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:47:59,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 00:47:59,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:47:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 00:47:59,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 00:47:59,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:47:59,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 516 transitions, 11049 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:47:59,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:47:59,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:47:59,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:01,890 INFO L130 PetriNetUnfolder]: 7189/12287 cut-off events. [2023-08-30 00:48:01,891 INFO L131 PetriNetUnfolder]: For 238309/239877 co-relation queries the response was YES. [2023-08-30 00:48:01,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100013 conditions, 12287 events. 7189/12287 cut-off events. For 238309/239877 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 93369 event pairs, 465 based on Foata normal form. 836/13070 useless extension candidates. Maximal degree in co-relation 99966. Up to 8315 conditions per place. [2023-08-30 00:48:01,987 INFO L137 encePairwiseOnDemand]: 198/205 looper letters, 532 selfloop transitions, 219 changer transitions 6/774 dead transitions. [2023-08-30 00:48:01,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 774 transitions, 17333 flow [2023-08-30 00:48:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 00:48:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 00:48:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1000 transitions. [2023-08-30 00:48:01,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2023-08-30 00:48:01,990 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1000 transitions. [2023-08-30 00:48:01,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1000 transitions. [2023-08-30 00:48:01,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:01,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1000 transitions. [2023-08-30 00:48:01,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 90.9090909090909) internal successors, (1000), 11 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,995 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:01,995 INFO L175 Difference]: Start difference. First operand has 130 places, 516 transitions, 11049 flow. Second operand 11 states and 1000 transitions. [2023-08-30 00:48:01,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 774 transitions, 17333 flow [2023-08-30 00:48:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 774 transitions, 16682 flow, removed 316 selfloop flow, removed 1 redundant places. [2023-08-30 00:48:02,746 INFO L231 Difference]: Finished difference. Result has 144 places, 619 transitions, 13495 flow [2023-08-30 00:48:02,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=10486, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13495, PETRI_PLACES=144, PETRI_TRANSITIONS=619} [2023-08-30 00:48:02,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2023-08-30 00:48:02,747 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 619 transitions, 13495 flow [2023-08-30 00:48:02,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:02,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:02,747 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] [2023-08-30 00:48:02,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:02,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:02,948 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:48:02,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 824336521, now seen corresponding path program 1 times [2023-08-30 00:48:02,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:02,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490493109] [2023-08-30 00:48:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:03,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:03,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490493109] [2023-08-30 00:48:03,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490493109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462277006] [2023-08-30 00:48:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:03,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:03,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:03,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:03,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 00:48:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:03,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:48:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:04,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462277006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:04,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:04,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-30 00:48:04,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607297625] [2023-08-30 00:48:04,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:04,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 00:48:04,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:04,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 00:48:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-30 00:48:04,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:48:04,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 619 transitions, 13495 flow. Second operand has 20 states, 20 states have (on average 84.5) internal successors, (1690), 20 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:04,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:04,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:48:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:13,553 INFO L130 PetriNetUnfolder]: 19989/32682 cut-off events. [2023-08-30 00:48:13,553 INFO L131 PetriNetUnfolder]: For 672685/672685 co-relation queries the response was YES. [2023-08-30 00:48:13,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264828 conditions, 32682 events. 19989/32682 cut-off events. For 672685/672685 co-relation queries the response was YES. Maximal size of possible extension queue 1630. Compared 260885 event pairs, 819 based on Foata normal form. 1994/34676 useless extension candidates. Maximal degree in co-relation 264775. Up to 7667 conditions per place. [2023-08-30 00:48:14,045 INFO L137 encePairwiseOnDemand]: 194/205 looper letters, 972 selfloop transitions, 1746 changer transitions 1/2719 dead transitions. [2023-08-30 00:48:14,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 2719 transitions, 57245 flow [2023-08-30 00:48:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 00:48:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 00:48:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5219 transitions. [2023-08-30 00:48:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454616724738676 [2023-08-30 00:48:14,052 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5219 transitions. [2023-08-30 00:48:14,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5219 transitions. [2023-08-30 00:48:14,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:14,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5219 transitions. [2023-08-30 00:48:14,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 93.19642857142857) internal successors, (5219), 56 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:14,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 205.0) internal successors, (11685), 57 states have internal predecessors, (11685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:14,074 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 205.0) internal successors, (11685), 57 states have internal predecessors, (11685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:14,074 INFO L175 Difference]: Start difference. First operand has 144 places, 619 transitions, 13495 flow. Second operand 56 states and 5219 transitions. [2023-08-30 00:48:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 2719 transitions, 57245 flow [2023-08-30 00:48:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 2719 transitions, 56846 flow, removed 187 selfloop flow, removed 2 redundant places. [2023-08-30 00:48:17,005 INFO L231 Difference]: Finished difference. Result has 238 places, 2057 transitions, 49945 flow [2023-08-30 00:48:17,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=13188, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=49945, PETRI_PLACES=238, PETRI_TRANSITIONS=2057} [2023-08-30 00:48:17,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2023-08-30 00:48:17,006 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 2057 transitions, 49945 flow [2023-08-30 00:48:17,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 84.5) internal successors, (1690), 20 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:17,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:48:17,007 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] [2023-08-30 00:48:17,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 00:48:17,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 00:48:17,217 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:48:17,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:48:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1181150605, now seen corresponding path program 2 times [2023-08-30 00:48:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:48:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634983243] [2023-08-30 00:48:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:48:17,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:48:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:48:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:17,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:48:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634983243] [2023-08-30 00:48:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634983243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:48:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634937453] [2023-08-30 00:48:17,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 00:48:17,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:48:17,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:48:17,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:48:17,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 00:48:17,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 00:48:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:48:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:48:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:48:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:17,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:48:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:48:18,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634937453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:48:18,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:48:18,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-30 00:48:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192975026] [2023-08-30 00:48:18,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:48:18,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 00:48:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:48:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 00:48:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-30 00:48:18,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:48:18,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 2057 transitions, 49945 flow. Second operand has 17 states, 17 states have (on average 84.47058823529412) internal successors, (1436), 17 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:18,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:48:18,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:48:18,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:48:38,354 INFO L130 PetriNetUnfolder]: 23910/39569 cut-off events. [2023-08-30 00:48:38,354 INFO L131 PetriNetUnfolder]: For 1189955/1189955 co-relation queries the response was YES. [2023-08-30 00:48:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389915 conditions, 39569 events. 23910/39569 cut-off events. For 1189955/1189955 co-relation queries the response was YES. Maximal size of possible extension queue 2071. Compared 329449 event pairs, 594 based on Foata normal form. 324/39893 useless extension candidates. Maximal degree in co-relation 389821. Up to 9113 conditions per place. [2023-08-30 00:48:38,928 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 1413 selfloop transitions, 2365 changer transitions 8/3786 dead transitions. [2023-08-30 00:48:38,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 3786 transitions, 94541 flow [2023-08-30 00:48:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-30 00:48:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-30 00:48:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4872 transitions. [2023-08-30 00:48:38,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841233317993556 [2023-08-30 00:48:38,934 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4872 transitions. [2023-08-30 00:48:38,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4872 transitions. [2023-08-30 00:48:38,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:48:38,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4872 transitions. [2023-08-30 00:48:38,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 91.9245283018868) internal successors, (4872), 53 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 205.0) internal successors, (11070), 54 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,955 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 205.0) internal successors, (11070), 54 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:48:38,955 INFO L175 Difference]: Start difference. First operand has 238 places, 2057 transitions, 49945 flow. Second operand 53 states and 4872 transitions. [2023-08-30 00:48:38,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 3786 transitions, 94541 flow [2023-08-30 00:49:02,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 3786 transitions, 86521 flow, removed 3991 selfloop flow, removed 1 redundant places. [2023-08-30 00:49:02,418 INFO L231 Difference]: Finished difference. Result has 330 places, 3189 transitions, 79820 flow [2023-08-30 00:49:02,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=44827, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=79820, PETRI_PLACES=330, PETRI_TRANSITIONS=3189} [2023-08-30 00:49:02,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2023-08-30 00:49:02,420 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 3189 transitions, 79820 flow [2023-08-30 00:49:02,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.47058823529412) internal successors, (1436), 17 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:02,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:49:02,421 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] [2023-08-30 00:49:02,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 00:49:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,627 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:49:02,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:49:02,627 INFO L85 PathProgramCache]: Analyzing trace with hash 293003447, now seen corresponding path program 3 times [2023-08-30 00:49:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:49:02,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190890627] [2023-08-30 00:49:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:49:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:49:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:49:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:02,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:49:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190890627] [2023-08-30 00:49:02,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190890627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:49:02,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322273590] [2023-08-30 00:49:02,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 00:49:02,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:49:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:49:02,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:49:02,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 00:49:02,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 00:49:02,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:49:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 00:49:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:49:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:49:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:49:03,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322273590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:49:03,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:49:03,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 18 [2023-08-30 00:49:03,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582965068] [2023-08-30 00:49:03,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:49:03,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 00:49:03,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:49:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 00:49:03,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-08-30 00:49:03,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:49:03,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 3189 transitions, 79820 flow. Second operand has 19 states, 19 states have (on average 84.42105263157895) internal successors, (1604), 19 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:03,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:49:03,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:49:03,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:49:47,757 INFO L130 PetriNetUnfolder]: 34659/57843 cut-off events. [2023-08-30 00:49:47,757 INFO L131 PetriNetUnfolder]: For 2043286/2043286 co-relation queries the response was YES. [2023-08-30 00:49:49,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595317 conditions, 57843 events. 34659/57843 cut-off events. For 2043286/2043286 co-relation queries the response was YES. Maximal size of possible extension queue 2952. Compared 512537 event pairs, 594 based on Foata normal form. 1062/58905 useless extension candidates. Maximal degree in co-relation 595183. Up to 12533 conditions per place. [2023-08-30 00:49:49,426 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 1807 selfloop transitions, 4019 changer transitions 9/5835 dead transitions. [2023-08-30 00:49:49,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 5835 transitions, 153261 flow [2023-08-30 00:49:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-30 00:49:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-30 00:49:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5655 transitions. [2023-08-30 00:49:49,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45221911235505796 [2023-08-30 00:49:49,431 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5655 transitions. [2023-08-30 00:49:49,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5655 transitions. [2023-08-30 00:49:49,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:49:49,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5655 transitions. [2023-08-30 00:49:49,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 92.70491803278688) internal successors, (5655), 61 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:49,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 205.0) internal successors, (12710), 62 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:49,451 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 205.0) internal successors, (12710), 62 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:49:49,451 INFO L175 Difference]: Start difference. First operand has 330 places, 3189 transitions, 79820 flow. Second operand 61 states and 5655 transitions. [2023-08-30 00:49:49,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 5835 transitions, 153261 flow [2023-08-30 00:51:02,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 5835 transitions, 149205 flow, removed 1579 selfloop flow, removed 5 redundant places. [2023-08-30 00:51:02,526 INFO L231 Difference]: Finished difference. Result has 432 places, 4980 transitions, 138402 flow [2023-08-30 00:51:02,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=76675, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=138402, PETRI_PLACES=432, PETRI_TRANSITIONS=4980} [2023-08-30 00:51:02,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2023-08-30 00:51:02,530 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 4980 transitions, 138402 flow [2023-08-30 00:51:02,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.42105263157895) internal successors, (1604), 19 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:02,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 00:51:02,530 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] [2023-08-30 00:51:02,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 00:51:02,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:02,736 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 00:51:02,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 00:51:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash -191346289, now seen corresponding path program 4 times [2023-08-30 00:51:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 00:51:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562057623] [2023-08-30 00:51:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 00:51:02,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 00:51:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 00:51:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 00:51:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562057623] [2023-08-30 00:51:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562057623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 00:51:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362538069] [2023-08-30 00:51:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 00:51:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 00:51:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 00:51:02,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 00:51:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 00:51:03,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 00:51:03,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 00:51:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 00:51:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 00:51:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:03,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 00:51:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 00:51:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362538069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 00:51:03,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 00:51:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 9] total 17 [2023-08-30 00:51:03,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526732636] [2023-08-30 00:51:03,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 00:51:03,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 00:51:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 00:51:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 00:51:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-30 00:51:03,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 205 [2023-08-30 00:51:03,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 4980 transitions, 138402 flow. Second operand has 18 states, 18 states have (on average 84.38888888888889) internal successors, (1519), 18 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:51:03,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 00:51:03,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 205 [2023-08-30 00:51:03,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 00:53:54,835 INFO L130 PetriNetUnfolder]: 73425/122989 cut-off events. [2023-08-30 00:53:54,836 INFO L131 PetriNetUnfolder]: For 5554297/5554297 co-relation queries the response was YES. [2023-08-30 00:54:00,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441029 conditions, 122989 events. 73425/122989 cut-off events. For 5554297/5554297 co-relation queries the response was YES. Maximal size of possible extension queue 6535. Compared 1208841 event pairs, 1405 based on Foata normal form. 3036/126025 useless extension candidates. Maximal degree in co-relation 1440851. Up to 25745 conditions per place. [2023-08-30 00:54:01,290 INFO L137 encePairwiseOnDemand]: 193/205 looper letters, 3123 selfloop transitions, 10147 changer transitions 50/13320 dead transitions. [2023-08-30 00:54:01,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 13320 transitions, 387704 flow [2023-08-30 00:54:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-08-30 00:54:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-08-30 00:54:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 11484 transitions. [2023-08-30 00:54:01,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45544318857822724 [2023-08-30 00:54:01,303 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 11484 transitions. [2023-08-30 00:54:01,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 11484 transitions. [2023-08-30 00:54:01,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 00:54:01,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 11484 transitions. [2023-08-30 00:54:01,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 93.36585365853658) internal successors, (11484), 123 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:01,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 205.0) internal successors, (25420), 124 states have internal predecessors, (25420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:01,341 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 205.0) internal successors, (25420), 124 states have internal predecessors, (25420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 00:54:01,341 INFO L175 Difference]: Start difference. First operand has 432 places, 4980 transitions, 138402 flow. Second operand 123 states and 11484 transitions. [2023-08-30 00:54:01,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 13320 transitions, 387704 flow Killed by 15