./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.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 b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 01:45:29,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 01:45:29,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 01:45:29,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 01:45:29,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 01:45:29,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 01:45:29,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 01:45:29,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 01:45:29,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 01:45:29,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 01:45:29,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 01:45:29,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 01:45:29,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 01:45:29,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 01:45:29,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 01:45:29,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 01:45:29,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 01:45:29,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 01:45:29,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 01:45:29,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 01:45:29,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 01:45:29,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 01:45:29,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 01:45:29,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 01:45:29,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 01:45:29,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 01:45:29,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 01:45:29,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 01:45:29,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 01:45:29,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 01:45:29,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 01:45:29,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 01:45:29,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 01:45:29,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 01:45:29,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 01:45:29,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 01:45:29,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 01:45:29,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 01:45:29,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 01:45:29,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 01:45:29,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 01:45:29,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 01:45:29,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 01:45:29,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 01:45:29,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 01:45:29,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 01:45:29,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 01:45:29,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 01:45:29,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 01:45:29,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 01:45:29,643 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 01:45:29,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 01:45:29,644 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 01:45:29,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 01:45:29,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 01:45:29,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 01:45:29,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 01:45:29,645 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 01:45:29,645 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 01:45:29,645 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 01:45:29,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 01:45:29,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 01:45:29,646 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 01:45:29,646 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 01:45:29,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 01:45:29,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 01:45:29,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 01:45:29,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:45:29,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 01:45:29,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 01:45:29,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 01:45:29,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 01:45:29,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 01:45:29,648 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 01:45:29,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 01:45:29,649 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 01:45:29,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 01:45:29,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 01:45:30,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 01:45:30,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 01:45:30,017 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 01:45:30,017 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 01:45:30,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-09-01 01:45:31,233 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 01:45:31,432 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 01:45:31,433 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-09-01 01:45:31,438 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc0f679b/5751dc17fc11491a935b8cf6a0c92bb8/FLAG9ef668d0e [2023-09-01 01:45:31,451 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc0f679b/5751dc17fc11491a935b8cf6a0c92bb8 [2023-09-01 01:45:31,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 01:45:31,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 01:45:31,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 01:45:31,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 01:45:31,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 01:45:31,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b788cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31, skipping insertion in model container [2023-09-01 01:45:31,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 01:45:31,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 01:45:31,677 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-09-01 01:45:31,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:45:31,711 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 01:45:31,762 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-09-01 01:45:31,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 01:45:31,795 INFO L208 MainTranslator]: Completed translation [2023-09-01 01:45:31,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31 WrapperNode [2023-09-01 01:45:31,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 01:45:31,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 01:45:31,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 01:45:31,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 01:45:31,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,874 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 406 [2023-09-01 01:45:31,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 01:45:31,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 01:45:31,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 01:45:31,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 01:45:31,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 01:45:31,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 01:45:31,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 01:45:31,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 01:45:31,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (1/1) ... [2023-09-01 01:45:31,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 01:45:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:45:31,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 01:45:32,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 01:45:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 01:45:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 01:45:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 01:45:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 01:45:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 01:45:32,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 01:45:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 01:45:32,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 01:45:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 01:45:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 01:45:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 01:45:32,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 01:45:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 01:45:32,045 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 01:45:32,215 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 01:45:32,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 01:45:32,873 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 01:45:32,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 01:45:32,890 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 01:45:32,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:45:32 BoogieIcfgContainer [2023-09-01 01:45:32,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 01:45:32,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 01:45:32,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 01:45:32,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 01:45:32,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:45:31" (1/3) ... [2023-09-01 01:45:32,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1644c86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:45:32, skipping insertion in model container [2023-09-01 01:45:32,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:45:31" (2/3) ... [2023-09-01 01:45:32,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1644c86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:45:32, skipping insertion in model container [2023-09-01 01:45:32,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:45:32" (3/3) ... [2023-09-01 01:45:32,903 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-09-01 01:45:32,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 01:45:32,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-09-01 01:45:32,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 01:45:33,076 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 01:45:33,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 533 transitions, 1082 flow [2023-09-01 01:45:33,355 INFO L130 PetriNetUnfolder]: 49/531 cut-off events. [2023-09-01 01:45:33,355 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:45:33,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 531 events. 49/531 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1665 event pairs, 0 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-09-01 01:45:33,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 533 transitions, 1082 flow [2023-09-01 01:45:33,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 485 places, 527 transitions, 1066 flow [2023-09-01 01:45:33,396 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 01:45:33,416 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 485 places, 527 transitions, 1066 flow [2023-09-01 01:45:33,420 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 485 places, 527 transitions, 1066 flow [2023-09-01 01:45:33,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 527 transitions, 1066 flow [2023-09-01 01:45:33,520 INFO L130 PetriNetUnfolder]: 49/527 cut-off events. [2023-09-01 01:45:33,520 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 01:45:33,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 527 events. 49/527 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1661 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 359. Up to 2 conditions per place. [2023-09-01 01:45:33,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 67080 [2023-09-01 01:45:58,327 INFO L134 LiptonReduction]: Checked pairs total: 72933 [2023-09-01 01:45:58,328 INFO L136 LiptonReduction]: Total number of compositions: 708 [2023-09-01 01:45:58,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 01:45:58,371 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;@34242c25, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 01:45:58,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-09-01 01:45:58,374 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 01:45:58,374 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 01:45:58,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:45:58,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:45:58,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:45:58,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:45:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 75103, now seen corresponding path program 1 times [2023-09-01 01:45:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:45:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745993151] [2023-09-01 01:45:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:45:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:45:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:45:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:45:58,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:45:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745993151] [2023-09-01 01:45:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745993151] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:45:58,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:45:58,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:45:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001446231] [2023-09-01 01:45:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:45:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:45:58,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:45:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:45:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:45:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1241 [2023-09-01 01:45:59,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:45:59,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1241 [2023-09-01 01:45:59,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:45:59,746 INFO L130 PetriNetUnfolder]: 1907/2918 cut-off events. [2023-09-01 01:45:59,747 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 01:45:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5900 conditions, 2918 events. 1907/2918 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 14855 event pairs, 1505 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 5696. Up to 2915 conditions per place. [2023-09-01 01:45:59,773 INFO L137 encePairwiseOnDemand]: 1219/1241 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-09-01 01:45:59,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 280 flow [2023-09-01 01:45:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:45:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:45:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1553 transitions. [2023-09-01 01:45:59,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171367177007789 [2023-09-01 01:45:59,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1553 transitions. [2023-09-01 01:45:59,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1553 transitions. [2023-09-01 01:45:59,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:45:59,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1553 transitions. [2023-09-01 01:45:59,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 517.6666666666666) internal successors, (1553), 3 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,818 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1553 transitions. [2023-09-01 01:45:59,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 280 flow [2023-09-01 01:45:59,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 01:45:59,824 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 160 flow [2023-09-01 01:45:59,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-09-01 01:45:59,828 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-09-01 01:45:59,829 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 160 flow [2023-09-01 01:45:59,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:45:59,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 01:45:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 01:45:59,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:45:59,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:45:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash 75102, now seen corresponding path program 1 times [2023-09-01 01:45:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:45:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429868123] [2023-09-01 01:45:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:45:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:45:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:45:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:45:59,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:45:59,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429868123] [2023-09-01 01:45:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429868123] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:45:59,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:45:59,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 01:45:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475413749] [2023-09-01 01:45:59,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:45:59,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:45:59,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:45:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:45:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:45:59,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1241 [2023-09-01 01:45:59,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:45:59,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:45:59,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1241 [2023-09-01 01:45:59,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:00,451 INFO L130 PetriNetUnfolder]: 1907/2914 cut-off events. [2023-09-01 01:46:00,451 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 01:46:00,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2914 events. 1907/2914 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 14821 event pairs, 1505 based on Foata normal form. 4/855 useless extension candidates. Maximal degree in co-relation 5846. Up to 2914 conditions per place. [2023-09-01 01:46:00,465 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-09-01 01:46:00,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 282 flow [2023-09-01 01:46:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1542 transitions. [2023-09-01 01:46:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418211120064463 [2023-09-01 01:46:00,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1542 transitions. [2023-09-01 01:46:00,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1542 transitions. [2023-09-01 01:46:00,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:00,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1542 transitions. [2023-09-01 01:46:00,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 514.0) internal successors, (1542), 3 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,483 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 160 flow. Second operand 3 states and 1542 transitions. [2023-09-01 01:46:00,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 282 flow [2023-09-01 01:46:00,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:00,486 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 154 flow [2023-09-01 01:46:00,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-09-01 01:46:00,487 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2023-09-01 01:46:00,487 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 154 flow [2023-09-01 01:46:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:00,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:00,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 01:46:00,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 01:46:00,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:00,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2333825, now seen corresponding path program 1 times [2023-09-01 01:46:00,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:00,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701594690] [2023-09-01 01:46:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:00,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:00,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:00,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701594690] [2023-09-01 01:46:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701594690] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808140912] [2023-09-01 01:46:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:00,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:00,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:00,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 01:46:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 01:46:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:00,891 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:00,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:00,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808140912] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:00,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:00,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-09-01 01:46:00,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194464293] [2023-09-01 01:46:00,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:00,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 01:46:00,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 01:46:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 01:46:01,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 1241 [2023-09-01 01:46:01,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 484.125) internal successors, (3873), 8 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:01,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:01,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 1241 [2023-09-01 01:46:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:03,375 INFO L130 PetriNetUnfolder]: 5719/8734 cut-off events. [2023-09-01 01:46:03,375 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:46:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17573 conditions, 8734 events. 5719/8734 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 53141 event pairs, 4515 based on Foata normal form. 0/2546 useless extension candidates. Maximal degree in co-relation 17565. Up to 2913 conditions per place. [2023-09-01 01:46:03,433 INFO L137 encePairwiseOnDemand]: 1232/1241 looper letters, 169 selfloop transitions, 12 changer transitions 0/181 dead transitions. [2023-09-01 01:46:03,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 788 flow [2023-09-01 01:46:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 01:46:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 01:46:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3089 transitions. [2023-09-01 01:46:03,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148536126779479 [2023-09-01 01:46:03,451 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3089 transitions. [2023-09-01 01:46:03,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3089 transitions. [2023-09-01 01:46:03,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:03,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3089 transitions. [2023-09-01 01:46:03,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 514.8333333333334) internal successors, (3089), 6 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:03,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1241.0) internal successors, (8687), 7 states have internal predecessors, (8687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:03,483 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1241.0) internal successors, (8687), 7 states have internal predecessors, (8687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:03,483 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 154 flow. Second operand 6 states and 3089 transitions. [2023-09-01 01:46:03,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 181 transitions, 788 flow [2023-09-01 01:46:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 181 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:03,490 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 245 flow [2023-09-01 01:46:03,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2023-09-01 01:46:03,491 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-09-01 01:46:03,492 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 245 flow [2023-09-01 01:46:03,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 484.125) internal successors, (3873), 8 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:03,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:03,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 01:46:03,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:03,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:03,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 813096415, now seen corresponding path program 2 times [2023-09-01 01:46:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:03,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228546204] [2023-09-01 01:46:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:04,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:04,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228546204] [2023-09-01 01:46:04,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228546204] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91670052] [2023-09-01 01:46:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:46:04,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:04,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:04,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:04,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 01:46:04,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:46:04,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:46:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 01:46:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:04,242 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:04,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 01:46:04,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:04,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91670052] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:04,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:46:04,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-09-01 01:46:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130560022] [2023-09-01 01:46:04,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 01:46:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 01:46:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-09-01 01:46:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-09-01 01:46:04,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:04,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:04,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-09-01 01:46:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:06,291 INFO L130 PetriNetUnfolder]: 5719/8732 cut-off events. [2023-09-01 01:46:06,292 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 01:46:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17601 conditions, 8732 events. 5719/8732 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 52249 event pairs, 4515 based on Foata normal form. 2/2552 useless extension candidates. Maximal degree in co-relation 17589. Up to 2910 conditions per place. [2023-09-01 01:46:06,329 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 167 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2023-09-01 01:46:06,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 179 transitions, 835 flow [2023-09-01 01:46:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:46:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:46:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3618 transitions. [2023-09-01 01:46:06,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41648440197997005 [2023-09-01 01:46:06,339 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3618 transitions. [2023-09-01 01:46:06,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3618 transitions. [2023-09-01 01:46:06,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:06,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3618 transitions. [2023-09-01 01:46:06,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 516.8571428571429) internal successors, (3618), 7 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:06,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:06,365 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:06,365 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 245 flow. Second operand 7 states and 3618 transitions. [2023-09-01 01:46:06,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 179 transitions, 835 flow [2023-09-01 01:46:06,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 179 transitions, 815 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:46:06,369 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 229 flow [2023-09-01 01:46:06,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-09-01 01:46:06,370 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-09-01 01:46:06,371 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 229 flow [2023-09-01 01:46:06,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:06,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:06,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-09-01 01:46:06,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:06,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 01:46:06,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:06,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash -558405069, now seen corresponding path program 1 times [2023-09-01 01:46:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913605392] [2023-09-01 01:46:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:46:06,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:06,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913605392] [2023-09-01 01:46:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913605392] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375989055] [2023-09-01 01:46:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:06,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:06,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 01:46:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 01:46:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:46:06,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 01:46:06,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375989055] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:06,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:06,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 01:46:06,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789892638] [2023-09-01 01:46:06,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:06,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 01:46:06,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 01:46:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-09-01 01:46:06,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-09-01 01:46:06,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 229 flow. Second operand has 11 states, 11 states have (on average 492.45454545454544) internal successors, (5417), 11 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:06,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:06,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-09-01 01:46:06,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:07,490 INFO L130 PetriNetUnfolder]: 1907/2920 cut-off events. [2023-09-01 01:46:07,491 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 01:46:07,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5914 conditions, 2920 events. 1907/2920 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 14700 event pairs, 1505 based on Foata normal form. 4/864 useless extension candidates. Maximal degree in co-relation 5903. Up to 2911 conditions per place. [2023-09-01 01:46:07,500 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-09-01 01:46:07,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 365 flow [2023-09-01 01:46:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:46:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:46:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3518 transitions. [2023-09-01 01:46:07,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40497294808334294 [2023-09-01 01:46:07,510 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3518 transitions. [2023-09-01 01:46:07,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3518 transitions. [2023-09-01 01:46:07,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:07,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3518 transitions. [2023-09-01 01:46:07,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 502.57142857142856) internal successors, (3518), 7 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:07,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:07,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:07,531 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 229 flow. Second operand 7 states and 3518 transitions. [2023-09-01 01:46:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 365 flow [2023-09-01 01:46:07,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 340 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 01:46:07,533 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 260 flow [2023-09-01 01:46:07,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-09-01 01:46:07,534 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-09-01 01:46:07,534 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 260 flow [2023-09-01 01:46:07,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 492.45454545454544) internal successors, (5417), 11 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:07,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:07,536 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-09-01 01:46:07,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:07,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:07,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:07,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623345, now seen corresponding path program 2 times [2023-09-01 01:46:07,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:07,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94253230] [2023-09-01 01:46:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:07,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:46:08,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:08,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94253230] [2023-09-01 01:46:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94253230] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:08,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:46:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842233166] [2023-09-01 01:46:08,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:08,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:46:08,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:46:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:46:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-09-01 01:46:08,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 493.25) internal successors, (1973), 4 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:08,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-09-01 01:46:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:08,523 INFO L130 PetriNetUnfolder]: 1415/2211 cut-off events. [2023-09-01 01:46:08,523 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-09-01 01:46:08,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4511 conditions, 2211 events. 1415/2211 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 10864 event pairs, 1106 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 4497. Up to 2211 conditions per place. [2023-09-01 01:46:08,534 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-09-01 01:46:08,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 380 flow [2023-09-01 01:46:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1535 transitions. [2023-09-01 01:46:08,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41230190706419556 [2023-09-01 01:46:08,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1535 transitions. [2023-09-01 01:46:08,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1535 transitions. [2023-09-01 01:46:08,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:08,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1535 transitions. [2023-09-01 01:46:08,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 511.6666666666667) internal successors, (1535), 3 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,549 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 260 flow. Second operand 3 states and 1535 transitions. [2023-09-01 01:46:08,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 380 flow [2023-09-01 01:46:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 356 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 01:46:08,553 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 224 flow [2023-09-01 01:46:08,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-09-01 01:46:08,554 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-09-01 01:46:08,554 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 224 flow [2023-09-01 01:46:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 493.25) internal successors, (1973), 4 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:08,555 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-09-01 01:46:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 01:46:08,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:08,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623343, now seen corresponding path program 1 times [2023-09-01 01:46:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:08,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568362546] [2023-09-01 01:46:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 01:46:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568362546] [2023-09-01 01:46:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568362546] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:08,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:08,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:46:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426302061] [2023-09-01 01:46:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:08,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:46:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:46:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:46:08,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-09-01 01:46:08,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 487.2) internal successors, (2436), 5 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:08,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:08,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-09-01 01:46:08,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:09,186 INFO L130 PetriNetUnfolder]: 923/1502 cut-off events. [2023-09-01 01:46:09,186 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 01:46:09,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1502 events. 923/1502 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7246 event pairs, 707 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 3063. Up to 1502 conditions per place. [2023-09-01 01:46:09,193 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-09-01 01:46:09,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 340 flow [2023-09-01 01:46:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1515 transitions. [2023-09-01 01:46:09,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40692989524576956 [2023-09-01 01:46:09,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1515 transitions. [2023-09-01 01:46:09,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1515 transitions. [2023-09-01 01:46:09,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:09,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1515 transitions. [2023-09-01 01:46:09,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 505.0) internal successors, (1515), 3 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:09,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:09,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:09,211 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 224 flow. Second operand 3 states and 1515 transitions. [2023-09-01 01:46:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 340 flow [2023-09-01 01:46:09,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:09,216 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 211 flow [2023-09-01 01:46:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-09-01 01:46:09,217 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-09-01 01:46:09,219 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 211 flow [2023-09-01 01:46:09,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 487.2) internal successors, (2436), 5 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:09,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:09,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-09-01 01:46:09,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 01:46:09,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:09,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 960788750, now seen corresponding path program 1 times [2023-09-01 01:46:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949903115] [2023-09-01 01:46:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:46:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:09,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949903115] [2023-09-01 01:46:09,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949903115] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:09,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:09,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 01:46:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123845181] [2023-09-01 01:46:09,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:46:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:09,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:46:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:46:09,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-09-01 01:46:09,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 493.75) internal successors, (1975), 4 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:09,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:09,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-09-01 01:46:09,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:09,990 INFO L130 PetriNetUnfolder]: 885/1431 cut-off events. [2023-09-01 01:46:09,990 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 01:46:09,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1431 events. 885/1431 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6772 event pairs, 676 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 2921. Up to 1431 conditions per place. [2023-09-01 01:46:09,998 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-09-01 01:46:09,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 333 flow [2023-09-01 01:46:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1531 transitions. [2023-09-01 01:46:10,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41122750470051034 [2023-09-01 01:46:10,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1531 transitions. [2023-09-01 01:46:10,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1531 transitions. [2023-09-01 01:46:10,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:10,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1531 transitions. [2023-09-01 01:46:10,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 510.3333333333333) internal successors, (1531), 3 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,019 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 211 flow. Second operand 3 states and 1531 transitions. [2023-09-01 01:46:10,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 333 flow [2023-09-01 01:46:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:10,021 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 208 flow [2023-09-01 01:46:10,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-09-01 01:46:10,024 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-09-01 01:46:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 208 flow [2023-09-01 01:46:10,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 493.75) internal successors, (1975), 4 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:10,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-09-01 01:46:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 01:46:10,026 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:10,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash 960788749, now seen corresponding path program 1 times [2023-09-01 01:46:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:10,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060103280] [2023-09-01 01:46:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 01:46:10,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:10,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060103280] [2023-09-01 01:46:10,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060103280] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:10,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:10,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:46:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088127191] [2023-09-01 01:46:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:10,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:46:10,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:10,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:46:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:46:10,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-09-01 01:46:10,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 487.6) internal successors, (2438), 5 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:10,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-09-01 01:46:10,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:10,719 INFO L130 PetriNetUnfolder]: 847/1360 cut-off events. [2023-09-01 01:46:10,720 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 01:46:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1360 events. 847/1360 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 6339 event pairs, 645 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 2779. Up to 1360 conditions per place. [2023-09-01 01:46:10,727 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-09-01 01:46:10,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 326 flow [2023-09-01 01:46:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2023-09-01 01:46:10,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40585549288208433 [2023-09-01 01:46:10,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2023-09-01 01:46:10,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2023-09-01 01:46:10,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:10,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2023-09-01 01:46:10,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,744 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 208 flow. Second operand 3 states and 1511 transitions. [2023-09-01 01:46:10,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 326 flow [2023-09-01 01:46:10,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:10,746 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 205 flow [2023-09-01 01:46:10,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-09-01 01:46:10,747 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-09-01 01:46:10,747 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 205 flow [2023-09-01 01:46:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 487.6) internal successors, (2438), 5 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:10,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:10,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 01:46:10,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -280315447, now seen corresponding path program 1 times [2023-09-01 01:46:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988572441] [2023-09-01 01:46:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 01:46:10,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988572441] [2023-09-01 01:46:10,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988572441] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:10,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:10,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:46:10,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472831607] [2023-09-01 01:46:10,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:10,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:46:10,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:46:10,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:46:11,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-09-01 01:46:11,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 477.0) internal successors, (2385), 5 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:11,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-09-01 01:46:11,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:11,358 INFO L130 PetriNetUnfolder]: 608/973 cut-off events. [2023-09-01 01:46:11,359 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 01:46:11,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 973 events. 608/973 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4020 event pairs, 438 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 2002. Up to 966 conditions per place. [2023-09-01 01:46:11,364 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-09-01 01:46:11,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 307 flow [2023-09-01 01:46:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:46:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:46:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1951 transitions. [2023-09-01 01:46:11,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930298146655923 [2023-09-01 01:46:11,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1951 transitions. [2023-09-01 01:46:11,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1951 transitions. [2023-09-01 01:46:11,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:11,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1951 transitions. [2023-09-01 01:46:11,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 487.75) internal successors, (1951), 4 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,385 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 205 flow. Second operand 4 states and 1951 transitions. [2023-09-01 01:46:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 307 flow [2023-09-01 01:46:11,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:46:11,387 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 198 flow [2023-09-01 01:46:11,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-09-01 01:46:11,389 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2023-09-01 01:46:11,389 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 198 flow [2023-09-01 01:46:11,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 477.0) internal successors, (2385), 5 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:11,390 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:11,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 01:46:11,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:11,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash -280315448, now seen corresponding path program 1 times [2023-09-01 01:46:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:11,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072125049] [2023-09-01 01:46:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:11,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 01:46:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072125049] [2023-09-01 01:46:11,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072125049] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:11,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:46:11,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:46:11,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171284581] [2023-09-01 01:46:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:46:11,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:46:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:46:11,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-09-01 01:46:11,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:11,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-09-01 01:46:11,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:11,805 INFO L130 PetriNetUnfolder]: 447/712 cut-off events. [2023-09-01 01:46:11,805 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 01:46:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 712 events. 447/712 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2689 event pairs, 303 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 1477. Up to 698 conditions per place. [2023-09-01 01:46:11,809 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 49 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-09-01 01:46:11,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 290 flow [2023-09-01 01:46:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:46:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:46:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1946 transitions. [2023-09-01 01:46:11,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920225624496374 [2023-09-01 01:46:11,816 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1946 transitions. [2023-09-01 01:46:11,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1946 transitions. [2023-09-01 01:46:11,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:11,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1946 transitions. [2023-09-01 01:46:11,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 486.5) internal successors, (1946), 4 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,827 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,827 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 198 flow. Second operand 4 states and 1946 transitions. [2023-09-01 01:46:11,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 290 flow [2023-09-01 01:46:11,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:46:11,829 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 189 flow [2023-09-01 01:46:11,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-09-01 01:46:11,829 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -17 predicate places. [2023-09-01 01:46:11,830 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 189 flow [2023-09-01 01:46:11,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:11,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:11,830 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:11,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 01:46:11,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:11,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:11,831 INFO L85 PathProgramCache]: Analyzing trace with hash -280315445, now seen corresponding path program 1 times [2023-09-01 01:46:11,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:11,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700662565] [2023-09-01 01:46:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 01:46:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:12,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700662565] [2023-09-01 01:46:12,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700662565] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:12,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964521071] [2023-09-01 01:46:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:12,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:12,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:12,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 01:46:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 01:46:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:12,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-09-01 01:46:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964521071] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:12,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:12,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-09-01 01:46:12,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332691734] [2023-09-01 01:46:12,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 01:46:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 01:46:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-09-01 01:46:14,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 1241 [2023-09-01 01:46:14,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 189 flow. Second operand has 21 states, 21 states have (on average 472.3809523809524) internal successors, (9920), 21 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:14,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:14,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 1241 [2023-09-01 01:46:14,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:14,881 INFO L130 PetriNetUnfolder]: 1087/1716 cut-off events. [2023-09-01 01:46:14,881 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 01:46:14,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1716 events. 1087/1716 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6999 event pairs, 303 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 3510. Up to 656 conditions per place. [2023-09-01 01:46:14,891 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-09-01 01:46:14,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 529 flow [2023-09-01 01:46:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 01:46:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 01:46:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4825 transitions. [2023-09-01 01:46:14,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887993553585818 [2023-09-01 01:46:14,902 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4825 transitions. [2023-09-01 01:46:14,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4825 transitions. [2023-09-01 01:46:14,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:14,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4825 transitions. [2023-09-01 01:46:14,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 482.5) internal successors, (4825), 10 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:14,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 1241.0) internal successors, (13651), 11 states have internal predecessors, (13651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:14,926 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 1241.0) internal successors, (13651), 11 states have internal predecessors, (13651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:14,926 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 189 flow. Second operand 10 states and 4825 transitions. [2023-09-01 01:46:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 529 flow [2023-09-01 01:46:14,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:46:14,930 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 267 flow [2023-09-01 01:46:14,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-09-01 01:46:14,931 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-09-01 01:46:14,931 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 267 flow [2023-09-01 01:46:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 472.3809523809524) internal successors, (9920), 21 states have internal predecessors, (9920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:14,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:14,934 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:14,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:15,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:15,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:15,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -280315446, now seen corresponding path program 1 times [2023-09-01 01:46:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652428684] [2023-09-01 01:46:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652428684] [2023-09-01 01:46:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652428684] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792522423] [2023-09-01 01:46:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:15,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:15,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:15,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 01:46:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:15,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 01:46:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:15,513 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:15,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:15,626 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-09-01 01:46:15,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-09-01 01:46:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:15,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792522423] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:16,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2023-09-01 01:46:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543273308] [2023-09-01 01:46:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:16,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:46:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:46:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-09-01 01:46:17,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-09-01 01:46:17,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 476.2) internal successors, (4762), 10 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:17,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-09-01 01:46:17,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:17,356 INFO L130 PetriNetUnfolder]: 933/1464 cut-off events. [2023-09-01 01:46:17,356 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-09-01 01:46:17,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1464 events. 933/1464 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5891 event pairs, 133 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 3387. Up to 1126 conditions per place. [2023-09-01 01:46:17,368 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-09-01 01:46:17,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 442 flow [2023-09-01 01:46:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:46:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:46:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2434 transitions. [2023-09-01 01:46:17,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922643029814666 [2023-09-01 01:46:17,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2434 transitions. [2023-09-01 01:46:17,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2434 transitions. [2023-09-01 01:46:17,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:17,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2434 transitions. [2023-09-01 01:46:17,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 486.8) internal successors, (2434), 5 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,385 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,385 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 267 flow. Second operand 5 states and 2434 transitions. [2023-09-01 01:46:17,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 442 flow [2023-09-01 01:46:17,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 404 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-09-01 01:46:17,389 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 268 flow [2023-09-01 01:46:17,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-09-01 01:46:17,390 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -12 predicate places. [2023-09-01 01:46:17,390 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 268 flow [2023-09-01 01:46:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 476.2) internal successors, (4762), 10 states have internal predecessors, (4762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:17,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:17,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:17,597 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,SelfDestructingSolverStorable12 [2023-09-01 01:46:17,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:17,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156475, now seen corresponding path program 1 times [2023-09-01 01:46:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125985249] [2023-09-01 01:46:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125985249] [2023-09-01 01:46:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125985249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739348648] [2023-09-01 01:46:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:17,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:17,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 01:46:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 01:46:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:18,011 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:18,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:18,049 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:18,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:18,184 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:46:18,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-09-01 01:46:18,196 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 01:46:18,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 01:46:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:18,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739348648] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:18,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:18,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-09-01 01:46:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36869738] [2023-09-01 01:46:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:46:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:46:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-09-01 01:46:19,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1241 [2023-09-01 01:46:19,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:19,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:19,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1241 [2023-09-01 01:46:19,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:20,414 INFO L130 PetriNetUnfolder]: 1317/2076 cut-off events. [2023-09-01 01:46:20,414 INFO L131 PetriNetUnfolder]: For 963/963 co-relation queries the response was YES. [2023-09-01 01:46:20,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 2076 events. 1317/2076 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9193 event pairs, 629 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5196. Up to 1457 conditions per place. [2023-09-01 01:46:20,429 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-09-01 01:46:20,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 600 flow [2023-09-01 01:46:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:46:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:46:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2433 transitions. [2023-09-01 01:46:20,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210314262691376 [2023-09-01 01:46:20,435 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2433 transitions. [2023-09-01 01:46:20,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2433 transitions. [2023-09-01 01:46:20,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:20,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2433 transitions. [2023-09-01 01:46:20,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 486.6) internal successors, (2433), 5 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,448 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 268 flow. Second operand 5 states and 2433 transitions. [2023-09-01 01:46:20,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 600 flow [2023-09-01 01:46:20,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 579 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:46:20,452 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 274 flow [2023-09-01 01:46:20,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-09-01 01:46:20,454 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-09-01 01:46:20,454 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 274 flow [2023-09-01 01:46:20,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 474.4) internal successors, (4744), 10 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:20,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:20,455 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:20,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:20,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:20,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156476, now seen corresponding path program 1 times [2023-09-01 01:46:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:20,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131765783] [2023-09-01 01:46:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:20,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:20,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131765783] [2023-09-01 01:46:20,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131765783] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009256416] [2023-09-01 01:46:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:20,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:20,977 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) [2023-09-01 01:46:20,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 01:46:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 01:46:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:21,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:46:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:21,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009256416] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:21,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:21,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-09-01 01:46:21,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034474191] [2023-09-01 01:46:21,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:21,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 01:46:21,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 01:46:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-09-01 01:46:22,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-09-01 01:46:22,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 274 flow. Second operand has 10 states, 10 states have (on average 476.4) internal successors, (4764), 10 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:22,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:22,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-09-01 01:46:22,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:22,547 INFO L130 PetriNetUnfolder]: 1189/1874 cut-off events. [2023-09-01 01:46:22,547 INFO L131 PetriNetUnfolder]: For 1068/1068 co-relation queries the response was YES. [2023-09-01 01:46:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5035 conditions, 1874 events. 1189/1874 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8072 event pairs, 417 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 5013. Up to 1046 conditions per place. [2023-09-01 01:46:22,557 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 83 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-09-01 01:46:22,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 591 flow [2023-09-01 01:46:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:46:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:46:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2441 transitions. [2023-09-01 01:46:22,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393392425463336 [2023-09-01 01:46:22,563 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2441 transitions. [2023-09-01 01:46:22,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2441 transitions. [2023-09-01 01:46:22,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:22,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2441 transitions. [2023-09-01 01:46:22,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 488.2) internal successors, (2441), 5 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:22,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:22,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:22,573 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 274 flow. Second operand 5 states and 2441 transitions. [2023-09-01 01:46:22,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 591 flow [2023-09-01 01:46:22,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 585 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:46:22,577 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 286 flow [2023-09-01 01:46:22,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-09-01 01:46:22,577 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-09-01 01:46:22,578 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 286 flow [2023-09-01 01:46:22,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 476.4) internal successors, (4764), 10 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:22,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:22,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:22,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:22,785 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:22,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850856, now seen corresponding path program 1 times [2023-09-01 01:46:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122594537] [2023-09-01 01:46:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:22,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 01:46:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122594537] [2023-09-01 01:46:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122594537] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280742797] [2023-09-01 01:46:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:23,123 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) [2023-09-01 01:46:23,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 01:46:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:23,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 01:46:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:23,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:46:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:23,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280742797] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:23,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2023-09-01 01:46:23,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071562788] [2023-09-01 01:46:23,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:23,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 01:46:23,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:23,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 01:46:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-09-01 01:46:25,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 469 out of 1241 [2023-09-01 01:46:25,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 286 flow. Second operand has 25 states, 25 states have (on average 470.52) internal successors, (11763), 25 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:25,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:25,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 469 of 1241 [2023-09-01 01:46:25,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:27,235 INFO L130 PetriNetUnfolder]: 2617/4060 cut-off events. [2023-09-01 01:46:27,235 INFO L131 PetriNetUnfolder]: For 3255/3255 co-relation queries the response was YES. [2023-09-01 01:46:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11728 conditions, 4060 events. 2617/4060 cut-off events. For 3255/3255 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 20276 event pairs, 417 based on Foata normal form. 222/3644 useless extension candidates. Maximal degree in co-relation 11705. Up to 1046 conditions per place. [2023-09-01 01:46:27,258 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 176 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2023-09-01 01:46:27,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 194 transitions, 1284 flow [2023-09-01 01:46:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 01:46:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 01:46:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5788 transitions. [2023-09-01 01:46:27,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866505506312116 [2023-09-01 01:46:27,269 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5788 transitions. [2023-09-01 01:46:27,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5788 transitions. [2023-09-01 01:46:27,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:27,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5788 transitions. [2023-09-01 01:46:27,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 482.3333333333333) internal successors, (5788), 12 states have internal predecessors, (5788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:27,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1241.0) internal successors, (16133), 13 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:27,292 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1241.0) internal successors, (16133), 13 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:27,293 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 286 flow. Second operand 12 states and 5788 transitions. [2023-09-01 01:46:27,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 194 transitions, 1284 flow [2023-09-01 01:46:27,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 194 transitions, 1271 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:46:27,300 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 364 flow [2023-09-01 01:46:27,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2023-09-01 01:46:27,301 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-09-01 01:46:27,302 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 364 flow [2023-09-01 01:46:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 470.52) internal successors, (11763), 25 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:27,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:27,303 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:27,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 01:46:27,510 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:27,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850857, now seen corresponding path program 1 times [2023-09-01 01:46:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410139939] [2023-09-01 01:46:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:27,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:27,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410139939] [2023-09-01 01:46:27,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410139939] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:27,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458525291] [2023-09-01 01:46:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:27,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:27,814 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:27,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 01:46:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 01:46:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:28,039 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:28,068 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:28,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:46:28,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:46:28,195 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 01:46:28,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 01:46:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:28,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:34,392 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:46:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458525291] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:34,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:34,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-09-01 01:46:34,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954616251] [2023-09-01 01:46:34,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:34,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 01:46:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 01:46:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-09-01 01:46:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 465 out of 1241 [2023-09-01 01:46:38,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 364 flow. Second operand has 26 states, 26 states have (on average 466.65384615384613) internal successors, (12133), 26 states have internal predecessors, (12133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:38,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:38,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 465 of 1241 [2023-09-01 01:46:38,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:39,697 INFO L130 PetriNetUnfolder]: 1957/3104 cut-off events. [2023-09-01 01:46:39,697 INFO L131 PetriNetUnfolder]: For 4610/4610 co-relation queries the response was YES. [2023-09-01 01:46:39,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9642 conditions, 3104 events. 1957/3104 cut-off events. For 4610/4610 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14961 event pairs, 629 based on Foata normal form. 222/2982 useless extension candidates. Maximal degree in co-relation 9615. Up to 1453 conditions per place. [2023-09-01 01:46:39,714 INFO L137 encePairwiseOnDemand]: 1233/1241 looper letters, 173 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2023-09-01 01:46:39,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1280 flow [2023-09-01 01:46:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 01:46:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 01:46:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 7597 transitions. [2023-09-01 01:46:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826047542304593 [2023-09-01 01:46:39,726 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 7597 transitions. [2023-09-01 01:46:39,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 7597 transitions. [2023-09-01 01:46:39,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:39,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 7597 transitions. [2023-09-01 01:46:39,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 474.8125) internal successors, (7597), 16 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:39,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 1241.0) internal successors, (21097), 17 states have internal predecessors, (21097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:39,752 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 1241.0) internal successors, (21097), 17 states have internal predecessors, (21097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:39,752 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 364 flow. Second operand 16 states and 7597 transitions. [2023-09-01 01:46:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1280 flow [2023-09-01 01:46:39,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 188 transitions, 1233 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-09-01 01:46:39,765 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 331 flow [2023-09-01 01:46:39,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=331, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2023-09-01 01:46:39,766 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2023-09-01 01:46:39,766 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 331 flow [2023-09-01 01:46:39,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 466.65384615384613) internal successors, (12133), 26 states have internal predecessors, (12133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:39,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:39,768 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:39,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 01:46:39,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:39,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1882735610, now seen corresponding path program 1 times [2023-09-01 01:46:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:39,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797192345] [2023-09-01 01:46:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797192345] [2023-09-01 01:46:40,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797192345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493235648] [2023-09-01 01:46:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:40,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:40,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 01:46:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:46:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:41,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-09-01 01:46:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:46:41,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:46:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493235648] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:41,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 01:46:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 16 [2023-09-01 01:46:41,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177542225] [2023-09-01 01:46:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:41,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:46:41,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:46:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 01:46:42,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 1241 [2023-09-01 01:46:42,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 488.25) internal successors, (1953), 4 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:42,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:42,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 1241 [2023-09-01 01:46:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:42,890 INFO L130 PetriNetUnfolder]: 2187/3522 cut-off events. [2023-09-01 01:46:42,890 INFO L131 PetriNetUnfolder]: For 4160/4160 co-relation queries the response was YES. [2023-09-01 01:46:42,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10454 conditions, 3522 events. 2187/3522 cut-off events. For 4160/4160 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17083 event pairs, 1257 based on Foata normal form. 150/3316 useless extension candidates. Maximal degree in co-relation 10429. Up to 2545 conditions per place. [2023-09-01 01:46:42,913 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 79 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-09-01 01:46:42,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 598 flow [2023-09-01 01:46:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:46:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:46:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1514 transitions. [2023-09-01 01:46:42,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40666129465484824 [2023-09-01 01:46:42,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1514 transitions. [2023-09-01 01:46:42,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1514 transitions. [2023-09-01 01:46:42,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:42,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1514 transitions. [2023-09-01 01:46:42,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 504.6666666666667) internal successors, (1514), 3 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:42,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:42,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:42,923 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 331 flow. Second operand 3 states and 1514 transitions. [2023-09-01 01:46:42,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 598 flow [2023-09-01 01:46:42,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 540 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-09-01 01:46:42,930 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 305 flow [2023-09-01 01:46:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-09-01 01:46:42,931 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-09-01 01:46:42,931 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 305 flow [2023-09-01 01:46:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 488.25) internal successors, (1953), 4 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:42,933 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:42,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 01:46:43,139 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:43,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174332, now seen corresponding path program 2 times [2023-09-01 01:46:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251849508] [2023-09-01 01:46:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251849508] [2023-09-01 01:46:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251849508] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529428015] [2023-09-01 01:46:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:46:43,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:43,856 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:43,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 01:46:44,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 01:46:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:46:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 01:46:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:44,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 01:46:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:46:44,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529428015] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:44,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:46:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-09-01 01:46:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960046514] [2023-09-01 01:46:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:46:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:46:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-09-01 01:46:44,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-09-01 01:46:44,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 482.55555555555554) internal successors, (4343), 9 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:44,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:44,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-09-01 01:46:44,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:45,596 INFO L130 PetriNetUnfolder]: 2101/3444 cut-off events. [2023-09-01 01:46:45,597 INFO L131 PetriNetUnfolder]: For 3422/3422 co-relation queries the response was YES. [2023-09-01 01:46:45,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 3444 events. 2101/3444 cut-off events. For 3422/3422 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17713 event pairs, 237 based on Foata normal form. 86/3264 useless extension candidates. Maximal degree in co-relation 9941. Up to 1010 conditions per place. [2023-09-01 01:46:45,614 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 217 selfloop transitions, 7 changer transitions 0/224 dead transitions. [2023-09-01 01:46:45,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 224 transitions, 1536 flow [2023-09-01 01:46:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 01:46:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 01:46:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4496 transitions. [2023-09-01 01:46:45,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025427522607216 [2023-09-01 01:46:45,618 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4496 transitions. [2023-09-01 01:46:45,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4496 transitions. [2023-09-01 01:46:45,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:45,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4496 transitions. [2023-09-01 01:46:45,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 499.55555555555554) internal successors, (4496), 9 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:45,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1241.0) internal successors, (12410), 10 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:45,632 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1241.0) internal successors, (12410), 10 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:45,633 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 305 flow. Second operand 9 states and 4496 transitions. [2023-09-01 01:46:45,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 224 transitions, 1536 flow [2023-09-01 01:46:45,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 224 transitions, 1512 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 01:46:45,647 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 295 flow [2023-09-01 01:46:45,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=295, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-09-01 01:46:45,648 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2023-09-01 01:46:45,648 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 295 flow [2023-09-01 01:46:45,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 482.55555555555554) internal successors, (4343), 9 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:45,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:45,649 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:45,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:45,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:45,856 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:45,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174331, now seen corresponding path program 2 times [2023-09-01 01:46:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418930272] [2023-09-01 01:46:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:45,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:46,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418930272] [2023-09-01 01:46:46,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418930272] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875086779] [2023-09-01 01:46:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 01:46:46,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:46,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 01:46:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 01:46:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 01:46:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 01:46:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:46,645 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:46,674 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:46,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:46,749 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 01:46:46,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-09-01 01:46:46,762 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 01:46:46,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 01:46:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-09-01 01:46:46,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 01:46:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875086779] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:46:46,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 01:46:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-09-01 01:46:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160274158] [2023-09-01 01:46:46,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:46:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:46:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:46:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-09-01 01:46:47,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1241 [2023-09-01 01:46:47,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 489.2) internal successors, (2446), 5 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:47,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:46:47,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1241 [2023-09-01 01:46:47,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:46:47,785 INFO L130 PetriNetUnfolder]: 1815/2986 cut-off events. [2023-09-01 01:46:47,786 INFO L131 PetriNetUnfolder]: For 2041/2041 co-relation queries the response was YES. [2023-09-01 01:46:47,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 2986 events. 1815/2986 cut-off events. For 2041/2041 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 14293 event pairs, 1467 based on Foata normal form. 0/2830 useless extension candidates. Maximal degree in co-relation 8828. Up to 2972 conditions per place. [2023-09-01 01:46:47,799 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 55 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-09-01 01:46:47,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 405 flow [2023-09-01 01:46:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:46:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:46:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2473 transitions. [2023-09-01 01:46:47,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398549556809025 [2023-09-01 01:46:47,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2473 transitions. [2023-09-01 01:46:47,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2473 transitions. [2023-09-01 01:46:47,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:46:47,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2473 transitions. [2023-09-01 01:46:47,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 494.6) internal successors, (2473), 5 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:47,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:47,808 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:47,808 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 295 flow. Second operand 5 states and 2473 transitions. [2023-09-01 01:46:47,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 405 flow [2023-09-01 01:46:47,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 392 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 01:46:47,814 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 282 flow [2023-09-01 01:46:47,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-09-01 01:46:47,815 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-09-01 01:46:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 282 flow [2023-09-01 01:46:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 489.2) internal successors, (2446), 5 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:46:47,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:46:47,815 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:46:47,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 01:46:48,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:48,022 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:46:48,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:46:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1762652807, now seen corresponding path program 1 times [2023-09-01 01:46:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:46:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106456363] [2023-09-01 01:46:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:48,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:46:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 01:46:48,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:46:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106456363] [2023-09-01 01:46:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106456363] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:46:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655115558] [2023-09-01 01:46:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:46:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:46:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:46:48,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:46:48,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 01:46:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:46:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 01:46:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:46:48,590 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:48,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:48,621 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 01:46:48,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 01:46:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 01:46:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 01:46:48,751 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 01:46:48,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 01:46:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:48,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:46:49,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 179 [2023-09-01 01:46:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2023-09-01 01:46:55,338 WARN L222 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:46:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:46:55,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655115558] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:46:55,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:46:55,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-09-01 01:46:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858169249] [2023-09-01 01:46:55,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:46:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 01:46:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:46:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 01:46:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-09-01 01:47:00,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 460 out of 1241 [2023-09-01 01:47:00,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 282 flow. Second operand has 27 states, 27 states have (on average 461.9259259259259) internal successors, (12472), 27 states have internal predecessors, (12472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:00,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:00,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 460 of 1241 [2023-09-01 01:47:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:01,477 INFO L130 PetriNetUnfolder]: 3237/5260 cut-off events. [2023-09-01 01:47:01,478 INFO L131 PetriNetUnfolder]: For 2427/2427 co-relation queries the response was YES. [2023-09-01 01:47:01,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15067 conditions, 5260 events. 3237/5260 cut-off events. For 2427/2427 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 26390 event pairs, 235 based on Foata normal form. 78/5052 useless extension candidates. Maximal degree in co-relation 15045. Up to 1612 conditions per place. [2023-09-01 01:47:01,504 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 154 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2023-09-01 01:47:01,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 176 transitions, 1083 flow [2023-09-01 01:47:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 01:47:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 01:47:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 7963 transitions. [2023-09-01 01:47:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37744703038346683 [2023-09-01 01:47:01,511 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 7963 transitions. [2023-09-01 01:47:01,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 7963 transitions. [2023-09-01 01:47:01,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:01,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 7963 transitions. [2023-09-01 01:47:01,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 468.4117647058824) internal successors, (7963), 17 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:01,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 1241.0) internal successors, (22338), 18 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:01,537 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 1241.0) internal successors, (22338), 18 states have internal predecessors, (22338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:01,538 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 282 flow. Second operand 17 states and 7963 transitions. [2023-09-01 01:47:01,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 176 transitions, 1083 flow [2023-09-01 01:47:01,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 176 transitions, 1078 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 01:47:01,545 INFO L231 Difference]: Finished difference. Result has 92 places, 66 transitions, 419 flow [2023-09-01 01:47:01,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=419, PETRI_PLACES=92, PETRI_TRANSITIONS=66} [2023-09-01 01:47:01,546 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-09-01 01:47:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 66 transitions, 419 flow [2023-09-01 01:47:01,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 461.9259259259259) internal successors, (12472), 27 states have internal predecessors, (12472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:01,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:01,548 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:01,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 01:47:01,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:01,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2057973880, now seen corresponding path program 1 times [2023-09-01 01:47:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:01,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047554349] [2023-09-01 01:47:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047554349] [2023-09-01 01:47:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047554349] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120630727] [2023-09-01 01:47:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:02,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:47:02,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-09-01 01:47:02,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 66 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:02,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:02,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-09-01 01:47:02,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:03,488 INFO L130 PetriNetUnfolder]: 3236/5264 cut-off events. [2023-09-01 01:47:03,488 INFO L131 PetriNetUnfolder]: For 4028/4028 co-relation queries the response was YES. [2023-09-01 01:47:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16206 conditions, 5264 events. 3236/5264 cut-off events. For 4028/4028 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 26577 event pairs, 2533 based on Foata normal form. 1/4979 useless extension candidates. Maximal degree in co-relation 16179. Up to 5137 conditions per place. [2023-09-01 01:47:03,511 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 79 selfloop transitions, 1 changer transitions 5/85 dead transitions. [2023-09-01 01:47:03,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 645 flow [2023-09-01 01:47:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:47:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:47:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1976 transitions. [2023-09-01 01:47:03,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980660757453666 [2023-09-01 01:47:03,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1976 transitions. [2023-09-01 01:47:03,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1976 transitions. [2023-09-01 01:47:03,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:03,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1976 transitions. [2023-09-01 01:47:03,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:03,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:03,519 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:03,520 INFO L175 Difference]: Start difference. First operand has 92 places, 66 transitions, 419 flow. Second operand 4 states and 1976 transitions. [2023-09-01 01:47:03,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 645 flow [2023-09-01 01:47:03,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 621 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-09-01 01:47:03,531 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 402 flow [2023-09-01 01:47:03,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-09-01 01:47:03,531 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2023-09-01 01:47:03,532 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 402 flow [2023-09-01 01:47:03,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:03,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:03,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:03,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 01:47:03,533 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:03,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1400394772, now seen corresponding path program 2 times [2023-09-01 01:47:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:03,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081104077] [2023-09-01 01:47:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:03,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:04,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081104077] [2023-09-01 01:47:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081104077] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:04,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135699128] [2023-09-01 01:47:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:47:04,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-09-01 01:47:04,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:04,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:04,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-09-01 01:47:04,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:05,489 INFO L130 PetriNetUnfolder]: 3233/5255 cut-off events. [2023-09-01 01:47:05,490 INFO L131 PetriNetUnfolder]: For 4437/4437 co-relation queries the response was YES. [2023-09-01 01:47:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 5255 events. 3233/5255 cut-off events. For 4437/4437 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 27134 event pairs, 2374 based on Foata normal form. 1/4944 useless extension candidates. Maximal degree in co-relation 16308. Up to 4844 conditions per place. [2023-09-01 01:47:05,515 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 104 selfloop transitions, 1 changer transitions 5/110 dead transitions. [2023-09-01 01:47:05,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 908 flow [2023-09-01 01:47:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:47:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:47:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1989 transitions. [2023-09-01 01:47:05,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2023-09-01 01:47:05,518 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1989 transitions. [2023-09-01 01:47:05,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1989 transitions. [2023-09-01 01:47:05,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:05,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1989 transitions. [2023-09-01 01:47:05,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 497.25) internal successors, (1989), 4 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:05,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:05,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:05,522 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 402 flow. Second operand 4 states and 1989 transitions. [2023-09-01 01:47:05,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 908 flow [2023-09-01 01:47:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 902 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:05,533 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 406 flow [2023-09-01 01:47:05,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-09-01 01:47:05,533 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-09-01 01:47:05,533 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 406 flow [2023-09-01 01:47:05,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 484.75) internal successors, (1939), 4 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:05,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:05,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:05,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 01:47:05,534 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:05,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 738807776, now seen corresponding path program 1 times [2023-09-01 01:47:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:05,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940688671] [2023-09-01 01:47:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:05,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:05,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940688671] [2023-09-01 01:47:05,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940688671] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:05,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:05,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355509204] [2023-09-01 01:47:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:47:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:47:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:47:05,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-09-01 01:47:05,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:05,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:05,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-09-01 01:47:05,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:06,702 INFO L130 PetriNetUnfolder]: 2977/4832 cut-off events. [2023-09-01 01:47:06,702 INFO L131 PetriNetUnfolder]: For 4794/4794 co-relation queries the response was YES. [2023-09-01 01:47:06,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 4832 events. 2977/4832 cut-off events. For 4794/4794 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 24335 event pairs, 2152 based on Foata normal form. 150/4694 useless extension candidates. Maximal degree in co-relation 15278. Up to 4428 conditions per place. [2023-09-01 01:47:06,724 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 102 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-09-01 01:47:06,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 884 flow [2023-09-01 01:47:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1548 transitions. [2023-09-01 01:47:06,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41579371474617244 [2023-09-01 01:47:06,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1548 transitions. [2023-09-01 01:47:06,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1548 transitions. [2023-09-01 01:47:06,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:06,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1548 transitions. [2023-09-01 01:47:06,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 516.0) internal successors, (1548), 3 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:06,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:06,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:06,730 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 406 flow. Second operand 3 states and 1548 transitions. [2023-09-01 01:47:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 884 flow [2023-09-01 01:47:06,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 104 transitions, 879 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:06,741 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 409 flow [2023-09-01 01:47:06,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=409, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2023-09-01 01:47:06,742 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-09-01 01:47:06,742 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 409 flow [2023-09-01 01:47:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:06,742 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 01:47:06,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:06,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2041561843, now seen corresponding path program 1 times [2023-09-01 01:47:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635242041] [2023-09-01 01:47:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:06,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635242041] [2023-09-01 01:47:06,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635242041] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:06,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:06,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:06,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190047693] [2023-09-01 01:47:06,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:47:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:47:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:47:06,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-09-01 01:47:06,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:06,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:06,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-09-01 01:47:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:07,840 INFO L130 PetriNetUnfolder]: 3014/4861 cut-off events. [2023-09-01 01:47:07,841 INFO L131 PetriNetUnfolder]: For 5400/5400 co-relation queries the response was YES. [2023-09-01 01:47:07,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16237 conditions, 4861 events. 3014/4861 cut-off events. For 5400/5400 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23756 event pairs, 2184 based on Foata normal form. 24/4597 useless extension candidates. Maximal degree in co-relation 16208. Up to 4484 conditions per place. [2023-09-01 01:47:07,865 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 80 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-09-01 01:47:07,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 644 flow [2023-09-01 01:47:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1541 transitions. [2023-09-01 01:47:07,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41391351060972337 [2023-09-01 01:47:07,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1541 transitions. [2023-09-01 01:47:07,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1541 transitions. [2023-09-01 01:47:07,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:07,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1541 transitions. [2023-09-01 01:47:07,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.6666666666666) internal successors, (1541), 3 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,870 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 409 flow. Second operand 3 states and 1541 transitions. [2023-09-01 01:47:07,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 644 flow [2023-09-01 01:47:07,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:07,878 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 436 flow [2023-09-01 01:47:07,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=436, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2023-09-01 01:47:07,879 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-09-01 01:47:07,879 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 436 flow [2023-09-01 01:47:07,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:07,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:07,879 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:07,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 01:47:07,880 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:07,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1157247728, now seen corresponding path program 1 times [2023-09-01 01:47:07,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:07,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747561844] [2023-09-01 01:47:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:07,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 01:47:08,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:08,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747561844] [2023-09-01 01:47:08,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747561844] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:08,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:08,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678446316] [2023-09-01 01:47:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:47:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:47:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:47:08,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 495 out of 1241 [2023-09-01 01:47:08,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:08,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:08,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 495 of 1241 [2023-09-01 01:47:08,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:08,980 INFO L130 PetriNetUnfolder]: 3008/4855 cut-off events. [2023-09-01 01:47:08,981 INFO L131 PetriNetUnfolder]: For 6087/6087 co-relation queries the response was YES. [2023-09-01 01:47:09,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16536 conditions, 4855 events. 3008/4855 cut-off events. For 6087/6087 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 24527 event pairs, 2121 based on Foata normal form. 6/4573 useless extension candidates. Maximal degree in co-relation 16506. Up to 4353 conditions per place. [2023-09-01 01:47:09,018 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 114 selfloop transitions, 2 changer transitions 2/118 dead transitions. [2023-09-01 01:47:09,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 986 flow [2023-09-01 01:47:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1549 transitions. [2023-09-01 01:47:09,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41606231533709376 [2023-09-01 01:47:09,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1549 transitions. [2023-09-01 01:47:09,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1549 transitions. [2023-09-01 01:47:09,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:09,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1549 transitions. [2023-09-01 01:47:09,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 516.3333333333334) internal successors, (1549), 3 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:09,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:09,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:09,029 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 436 flow. Second operand 3 states and 1549 transitions. [2023-09-01 01:47:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 986 flow [2023-09-01 01:47:09,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 979 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:09,039 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 442 flow [2023-09-01 01:47:09,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-09-01 01:47:09,040 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-09-01 01:47:09,040 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 442 flow [2023-09-01 01:47:09,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:09,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:09,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 01:47:09,041 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:09,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1416703408, now seen corresponding path program 2 times [2023-09-01 01:47:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065791174] [2023-09-01 01:47:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 01:47:09,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:09,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065791174] [2023-09-01 01:47:09,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065791174] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:09,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:09,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 01:47:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037915895] [2023-09-01 01:47:09,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:09,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 01:47:09,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 01:47:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 01:47:09,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1241 [2023-09-01 01:47:09,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:09,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:09,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1241 [2023-09-01 01:47:09,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:10,266 INFO L130 PetriNetUnfolder]: 2713/4364 cut-off events. [2023-09-01 01:47:10,266 INFO L131 PetriNetUnfolder]: For 6889/6889 co-relation queries the response was YES. [2023-09-01 01:47:10,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14915 conditions, 4364 events. 2713/4364 cut-off events. For 6889/6889 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 21192 event pairs, 1282 based on Foata normal form. 162/4262 useless extension candidates. Maximal degree in co-relation 14884. Up to 4333 conditions per place. [2023-09-01 01:47:10,288 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 70 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-09-01 01:47:10,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 629 flow [2023-09-01 01:47:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 01:47:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 01:47:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1536 transitions. [2023-09-01 01:47:10,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125705076551168 [2023-09-01 01:47:10,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1536 transitions. [2023-09-01 01:47:10,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1536 transitions. [2023-09-01 01:47:10,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:10,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1536 transitions. [2023-09-01 01:47:10,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.0) internal successors, (1536), 3 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:10,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:10,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1241.0) internal successors, (4964), 4 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:10,295 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 442 flow. Second operand 3 states and 1536 transitions. [2023-09-01 01:47:10,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 629 flow [2023-09-01 01:47:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 621 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 01:47:10,302 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 457 flow [2023-09-01 01:47:10,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2023-09-01 01:47:10,303 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-09-01 01:47:10,303 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 457 flow [2023-09-01 01:47:10,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:10,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:10,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 01:47:10,304 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:10,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 637856133, now seen corresponding path program 1 times [2023-09-01 01:47:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2392715] [2023-09-01 01:47:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:47:10,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:10,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2392715] [2023-09-01 01:47:10,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2392715] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:10,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463278322] [2023-09-01 01:47:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:10,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:10,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:10,821 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:47:10,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 01:47:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 01:47:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:11,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-09-01 01:47:11,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-09-01 01:47:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:47:11,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:12,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 178 [2023-09-01 01:47:12,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 176 [2023-09-01 01:47:12,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-09-01 01:47:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 01:47:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463278322] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:47:12,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:47:12,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-09-01 01:47:12,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498091766] [2023-09-01 01:47:12,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:47:12,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 01:47:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 01:47:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 01:47:15,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 1241 [2023-09-01 01:47:15,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 457 flow. Second operand has 34 states, 34 states have (on average 472.0) internal successors, (16048), 34 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:15,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:15,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 1241 [2023-09-01 01:47:15,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:16,918 INFO L130 PetriNetUnfolder]: 3533/5666 cut-off events. [2023-09-01 01:47:16,918 INFO L131 PetriNetUnfolder]: For 8282/8282 co-relation queries the response was YES. [2023-09-01 01:47:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 5666 events. 3533/5666 cut-off events. For 8282/8282 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 26188 event pairs, 575 based on Foata normal form. 242/5556 useless extension candidates. Maximal degree in co-relation 19402. Up to 1196 conditions per place. [2023-09-01 01:47:16,949 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 186 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2023-09-01 01:47:16,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 214 transitions, 1535 flow [2023-09-01 01:47:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 01:47:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 01:47:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7224 transitions. [2023-09-01 01:47:16,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880741337630943 [2023-09-01 01:47:16,956 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7224 transitions. [2023-09-01 01:47:16,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7224 transitions. [2023-09-01 01:47:16,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:16,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7224 transitions. [2023-09-01 01:47:16,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 481.6) internal successors, (7224), 15 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:16,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 1241.0) internal successors, (19856), 16 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:16,974 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 1241.0) internal successors, (19856), 16 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:16,975 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 457 flow. Second operand 15 states and 7224 transitions. [2023-09-01 01:47:16,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 214 transitions, 1535 flow [2023-09-01 01:47:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 214 transitions, 1513 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-09-01 01:47:16,989 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 623 flow [2023-09-01 01:47:16,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=623, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2023-09-01 01:47:16,990 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2023-09-01 01:47:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 623 flow [2023-09-01 01:47:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 472.0) internal successors, (16048), 34 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:16,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:16,992 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:17,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 01:47:17,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:17,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:17,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1725056729, now seen corresponding path program 1 times [2023-09-01 01:47:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68893324] [2023-09-01 01:47:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68893324] [2023-09-01 01:47:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68893324] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:18,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 01:47:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821315192] [2023-09-01 01:47:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 01:47:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 01:47:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 01:47:18,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-09-01 01:47:18,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 623 flow. Second operand has 5 states, 5 states have (on average 485.6) internal successors, (2428), 5 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:18,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:18,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-09-01 01:47:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:19,561 INFO L130 PetriNetUnfolder]: 3806/6111 cut-off events. [2023-09-01 01:47:19,561 INFO L131 PetriNetUnfolder]: For 11988/11988 co-relation queries the response was YES. [2023-09-01 01:47:19,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 6111 events. 3806/6111 cut-off events. For 11988/11988 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 29416 event pairs, 2414 based on Foata normal form. 22/5781 useless extension candidates. Maximal degree in co-relation 22036. Up to 5330 conditions per place. [2023-09-01 01:47:19,596 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 104 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2023-09-01 01:47:19,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 1047 flow [2023-09-01 01:47:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 01:47:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 01:47:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2476 transitions. [2023-09-01 01:47:19,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990330378726833 [2023-09-01 01:47:19,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2476 transitions. [2023-09-01 01:47:19,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2476 transitions. [2023-09-01 01:47:19,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:19,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2476 transitions. [2023-09-01 01:47:19,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 495.2) internal successors, (2476), 5 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:19,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:19,604 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1241.0) internal successors, (7446), 6 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:19,604 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 623 flow. Second operand 5 states and 2476 transitions. [2023-09-01 01:47:19,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 1047 flow [2023-09-01 01:47:19,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 119 transitions, 1000 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-09-01 01:47:19,622 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 687 flow [2023-09-01 01:47:19,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=687, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2023-09-01 01:47:19,623 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2023-09-01 01:47:19,623 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 687 flow [2023-09-01 01:47:19,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 485.6) internal successors, (2428), 5 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:19,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:19,624 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:19,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 01:47:19,624 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:19,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash -972902513, now seen corresponding path program 2 times [2023-09-01 01:47:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:19,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069468060] [2023-09-01 01:47:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 01:47:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069468060] [2023-09-01 01:47:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069468060] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:20,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 01:47:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306563184] [2023-09-01 01:47:20,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:20,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 01:47:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 01:47:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 01:47:21,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 1241 [2023-09-01 01:47:21,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 476.55555555555554) internal successors, (4289), 9 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:21,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:21,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 1241 [2023-09-01 01:47:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:22,712 INFO L130 PetriNetUnfolder]: 3930/6319 cut-off events. [2023-09-01 01:47:22,712 INFO L131 PetriNetUnfolder]: For 12872/12872 co-relation queries the response was YES. [2023-09-01 01:47:22,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 6319 events. 3930/6319 cut-off events. For 12872/12872 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 30300 event pairs, 2554 based on Foata normal form. 21/6230 useless extension candidates. Maximal degree in co-relation 23596. Up to 5322 conditions per place. [2023-09-01 01:47:22,749 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 103 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2023-09-01 01:47:22,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 120 transitions, 1083 flow [2023-09-01 01:47:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 01:47:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 01:47:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3384 transitions. [2023-09-01 01:47:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38954759986186255 [2023-09-01 01:47:22,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3384 transitions. [2023-09-01 01:47:22,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3384 transitions. [2023-09-01 01:47:22,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:22,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3384 transitions. [2023-09-01 01:47:22,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 483.42857142857144) internal successors, (3384), 7 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:22,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:22,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1241.0) internal successors, (9928), 8 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:22,759 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 687 flow. Second operand 7 states and 3384 transitions. [2023-09-01 01:47:22,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 120 transitions, 1083 flow [2023-09-01 01:47:22,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 120 transitions, 1083 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 01:47:22,780 INFO L231 Difference]: Finished difference. Result has 111 places, 87 transitions, 767 flow [2023-09-01 01:47:22,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=111, PETRI_TRANSITIONS=87} [2023-09-01 01:47:22,781 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2023-09-01 01:47:22,781 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 87 transitions, 767 flow [2023-09-01 01:47:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 476.55555555555554) internal successors, (4289), 9 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:22,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:22,782 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:22,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 01:47:22,783 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:22,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1341286550, now seen corresponding path program 1 times [2023-09-01 01:47:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:22,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844813979] [2023-09-01 01:47:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 01:47:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844813979] [2023-09-01 01:47:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844813979] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 01:47:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 01:47:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 01:47:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217537784] [2023-09-01 01:47:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 01:47:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 01:47:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:47:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 01:47:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 01:47:23,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-09-01 01:47:23,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 87 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:23,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:47:23,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-09-01 01:47:23,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:47:24,993 INFO L130 PetriNetUnfolder]: 5585/9003 cut-off events. [2023-09-01 01:47:24,993 INFO L131 PetriNetUnfolder]: For 22515/22515 co-relation queries the response was YES. [2023-09-01 01:47:25,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34673 conditions, 9003 events. 5585/9003 cut-off events. For 22515/22515 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 47430 event pairs, 2468 based on Foata normal form. 154/9047 useless extension candidates. Maximal degree in co-relation 34632. Up to 5905 conditions per place. [2023-09-01 01:47:25,041 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 97 selfloop transitions, 22 changer transitions 9/128 dead transitions. [2023-09-01 01:47:25,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 128 transitions, 1328 flow [2023-09-01 01:47:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 01:47:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 01:47:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-09-01 01:47:25,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40713134568896053 [2023-09-01 01:47:25,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-09-01 01:47:25,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-09-01 01:47:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 01:47:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-09-01 01:47:25,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1241.0) internal successors, (6205), 5 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,052 INFO L175 Difference]: Start difference. First operand has 111 places, 87 transitions, 767 flow. Second operand 4 states and 2021 transitions. [2023-09-01 01:47:25,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 128 transitions, 1328 flow [2023-09-01 01:47:25,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 128 transitions, 1325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 01:47:25,092 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 1030 flow [2023-09-01 01:47:25,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1241, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1030, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2023-09-01 01:47:25,093 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2023-09-01 01:47:25,093 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 1030 flow [2023-09-01 01:47:25,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:47:25,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 01:47:25,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 01:47:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 01:47:25,094 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-09-01 01:47:25,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 01:47:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -21542784, now seen corresponding path program 1 times [2023-09-01 01:47:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 01:47:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851002250] [2023-09-01 01:47:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 01:47:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 01:47:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851002250] [2023-09-01 01:47:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851002250] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 01:47:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196068885] [2023-09-01 01:47:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 01:47:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 01:47:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 01:47:27,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 01:47:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 01:47:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 01:47:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 01:47:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 01:47:28,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:47:28,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 430 treesize of output 374 [2023-09-01 01:47:28,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:47:28,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2023-09-01 01:47:28,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:47:28,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2023-09-01 01:47:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:47:29,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 01:47:31,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:47:31,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 277 [2023-09-01 01:47:31,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 01:47:31,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 269 treesize of output 273 [2023-09-01 01:47:47,084 WARN L222 SmtUtils]: Spent 14.12s on a formula simplification. DAG size of input: 44 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:47:47,546 INFO L321 Elim1Store]: treesize reduction 21, result has 91.3 percent of original size [2023-09-01 01:47:47,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 292 [2023-09-01 01:54:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 01:54:07,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196068885] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 01:54:07,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 01:54:07,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-09-01 01:54:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866748840] [2023-09-01 01:54:07,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 01:54:07,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 01:54:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 01:54:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 01:54:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-09-01 01:54:09,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:54:16,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 1241 [2023-09-01 01:54:16,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 1030 flow. Second operand has 26 states, 26 states have (on average 424.2692307692308) internal successors, (11031), 26 states have internal predecessors, (11031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 01:54:16,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 01:54:16,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 1241 [2023-09-01 01:54:16,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 01:54:48,906 WARN L222 SmtUtils]: Spent 24.43s on a formula simplification. DAG size of input: 95 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:55:18,723 WARN L222 SmtUtils]: Spent 25.08s on a formula simplification. DAG size of input: 74 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:55:37,411 WARN L222 SmtUtils]: Spent 18.52s on a formula simplification. DAG size of input: 159 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:56:00,026 WARN L222 SmtUtils]: Spent 22.53s on a formula simplification. DAG size of input: 155 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:56:25,140 WARN L222 SmtUtils]: Spent 24.43s on a formula simplification. DAG size of input: 117 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:56:44,683 WARN L222 SmtUtils]: Spent 19.46s on a formula simplification. DAG size of input: 174 DAG size of output: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:57:03,404 WARN L222 SmtUtils]: Spent 18.64s on a formula simplification. DAG size of input: 118 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:57:05,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:57:15,840 WARN L222 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 129 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:57:41,744 WARN L222 SmtUtils]: Spent 25.64s on a formula simplification. DAG size of input: 139 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:57:58,562 WARN L222 SmtUtils]: Spent 16.71s on a formula simplification. DAG size of input: 157 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:58:17,363 WARN L222 SmtUtils]: Spent 18.72s on a formula simplification. DAG size of input: 137 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 01:58:19,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 01:58:21,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15