./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:54:33,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:54:33,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:54:33,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:54:33,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:54:33,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:54:33,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:54:33,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:54:33,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:54:33,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:54:33,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:54:33,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:54:33,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:54:33,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:54:33,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:54:33,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:54:33,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:54:33,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:54:33,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:54:33,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:54:33,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:54:33,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:54:33,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:54:33,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:54:33,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:54:33,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:54:33,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:54:33,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:54:33,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:54:33,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:54:33,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:54:33,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:54:33,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:54:33,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:54:33,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:54:33,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:54:33,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:54:33,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:54:33,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:54:33,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:54:33,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:54:33,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:54:33,147 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:54:33,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:54:33,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:54:33,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:54:33,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:54:33,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:54:33,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:54:33,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:54:33,150 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:54:33,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:54:33,151 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:54:33,152 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:54:33,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:54:33,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:54:33,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:54:33,152 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:54:33,153 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:54:33,153 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:54:33,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:54:33,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:54:33,153 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:54:33,154 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:54:33,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:54:33,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:54:33,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:54:33,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:54:33,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:54:33,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:54:33,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:54:33,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:54:33,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:54:33,156 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:54:33,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:54:33,156 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:54:33,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:54:33,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:54:33,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:54:33,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:54:33,457 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:54:33,458 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:54:33,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-08-29 22:54:34,714 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:54:34,915 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:54:34,915 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-08-29 22:54:34,927 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3865e5e5/a6a5bfc3ec6a470d9afb54baa19f1648/FLAG240c2c884 [2023-08-29 22:54:34,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3865e5e5/a6a5bfc3ec6a470d9afb54baa19f1648 [2023-08-29 22:54:34,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:54:34,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:54:34,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:54:34,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:54:34,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:54:34,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:54:34" (1/1) ... [2023-08-29 22:54:34,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7538cc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:34, skipping insertion in model container [2023-08-29 22:54:34,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:54:34" (1/1) ... [2023-08-29 22:54:34,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:54:35,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:54:35,210 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] [2023-08-29 22:54:35,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:54:35,239 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:54:35,280 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] [2023-08-29 22:54:35,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:54:35,332 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:54:35,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35 WrapperNode [2023-08-29 22:54:35,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:54:35,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:54:35,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:54:35,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:54:35,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,399 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 406 [2023-08-29 22:54:35,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:54:35,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:54:35,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:54:35,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:54:35,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:54:35,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:54:35,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:54:35,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:54:35,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (1/1) ... [2023-08-29 22:54:35,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:54:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:54:35,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:54:35,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:54:35,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:54:35,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:54:35,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:54:35,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:54:35,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 22:54:35,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 22:54:35,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 22:54:35,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 22:54:35,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:54:35,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:54:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:54:35,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:54:35,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:54:35,536 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:54:35,636 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:54:35,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:54:36,293 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:54:36,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:54:36,304 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 22:54:36,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:54:36 BoogieIcfgContainer [2023-08-29 22:54:36,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:54:36,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:54:36,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:54:36,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:54:36,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:54:34" (1/3) ... [2023-08-29 22:54:36,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cd99a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:54:36, skipping insertion in model container [2023-08-29 22:54:36,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:54:35" (2/3) ... [2023-08-29 22:54:36,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cd99a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:54:36, skipping insertion in model container [2023-08-29 22:54:36,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:54:36" (3/3) ... [2023-08-29 22:54:36,314 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-08-29 22:54:36,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:54:36,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2023-08-29 22:54:36,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:54:36,521 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 22:54:36,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 491 places, 533 transitions, 1082 flow [2023-08-29 22:54:36,818 INFO L130 PetriNetUnfolder]: 49/531 cut-off events. [2023-08-29 22:54:36,818 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:54:36,833 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. [2023-08-29 22:54:36,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 491 places, 533 transitions, 1082 flow [2023-08-29 22:54:36,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 485 places, 527 transitions, 1066 flow [2023-08-29 22:54:36,849 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:54:36,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 485 places, 527 transitions, 1066 flow [2023-08-29 22:54:36,865 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 485 places, 527 transitions, 1066 flow [2023-08-29 22:54:36,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 527 transitions, 1066 flow [2023-08-29 22:54:36,957 INFO L130 PetriNetUnfolder]: 49/527 cut-off events. [2023-08-29 22:54:36,957 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 22:54:36,963 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. [2023-08-29 22:54:36,990 INFO L119 LiptonReduction]: Number of co-enabled transitions 67080 [2023-08-29 22:55:01,047 INFO L134 LiptonReduction]: Checked pairs total: 72933 [2023-08-29 22:55:01,047 INFO L136 LiptonReduction]: Total number of compositions: 708 [2023-08-29 22:55:01,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:55:01,065 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;@5e191498, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:55:01,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2023-08-29 22:55:01,068 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 22:55:01,068 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:55:01,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:55:01,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:01,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 75103, now seen corresponding path program 1 times [2023-08-29 22:55:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:01,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087006634] [2023-08-29 22:55:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:01,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:01,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:01,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087006634] [2023-08-29 22:55:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087006634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:01,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:01,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:55:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175484975] [2023-08-29 22:55:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:01,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:55:01,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:55:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:55:01,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1241 [2023-08-29 22:55:01,764 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) [2023-08-29 22:55:01,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:01,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1241 [2023-08-29 22:55:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:02,359 INFO L130 PetriNetUnfolder]: 1907/2918 cut-off events. [2023-08-29 22:55:02,360 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 22:55:02,363 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. [2023-08-29 22:55:02,377 INFO L137 encePairwiseOnDemand]: 1219/1241 looper letters, 63 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-29 22:55:02,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 280 flow [2023-08-29 22:55:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1553 transitions. [2023-08-29 22:55:02,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171367177007789 [2023-08-29 22:55:02,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1553 transitions. [2023-08-29 22:55:02,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1553 transitions. [2023-08-29 22:55:02,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:02,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1553 transitions. [2023-08-29 22:55:02,413 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) [2023-08-29 22:55:02,425 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) [2023-08-29 22:55:02,428 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) [2023-08-29 22:55:02,430 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 164 flow. Second operand 3 states and 1553 transitions. [2023-08-29 22:55:02,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 280 flow [2023-08-29 22:55:02,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:55:02,438 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 160 flow [2023-08-29 22:55:02,440 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} [2023-08-29 22:55:02,443 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -14 predicate places. [2023-08-29 22:55:02,443 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 160 flow [2023-08-29 22:55:02,444 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) [2023-08-29 22:55:02,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:02,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:55:02,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:55:02,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:02,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 75102, now seen corresponding path program 1 times [2023-08-29 22:55:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:02,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296433807] [2023-08-29 22:55:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:02,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296433807] [2023-08-29 22:55:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296433807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:02,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:02,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:55:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919370170] [2023-08-29 22:55:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:02,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:55:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:55:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:55:02,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 493 out of 1241 [2023-08-29 22:55:02,645 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) [2023-08-29 22:55:02,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:02,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 493 of 1241 [2023-08-29 22:55:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:03,099 INFO L130 PetriNetUnfolder]: 1907/2914 cut-off events. [2023-08-29 22:55:03,099 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:55:03,101 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. [2023-08-29 22:55:03,114 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-29 22:55:03,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 282 flow [2023-08-29 22:55:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1542 transitions. [2023-08-29 22:55:03,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418211120064463 [2023-08-29 22:55:03,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1542 transitions. [2023-08-29 22:55:03,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1542 transitions. [2023-08-29 22:55:03,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:03,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1542 transitions. [2023-08-29 22:55:03,125 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) [2023-08-29 22:55:03,132 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) [2023-08-29 22:55:03,134 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) [2023-08-29 22:55:03,134 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 160 flow. Second operand 3 states and 1542 transitions. [2023-08-29 22:55:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 282 flow [2023-08-29 22:55:03,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:03,137 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 154 flow [2023-08-29 22:55:03,137 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} [2023-08-29 22:55:03,138 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -15 predicate places. [2023-08-29 22:55:03,138 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 154 flow [2023-08-29 22:55:03,139 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) [2023-08-29 22:55:03,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:03,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 22:55:03,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:55:03,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:03,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2333825, now seen corresponding path program 1 times [2023-08-29 22:55:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:03,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8113144] [2023-08-29 22:55:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:03,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:03,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8113144] [2023-08-29 22:55:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8113144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332105415] [2023-08-29 22:55:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:03,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:03,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:03,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:03,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:55:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:03,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 22:55:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:03,532 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:03,533 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 [2023-08-29 22:55:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:03,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332105415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:03,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:03,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 22:55:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737203180] [2023-08-29 22:55:03,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:03,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:55:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:55:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:55:04,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 1241 [2023-08-29 22:55:04,346 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) [2023-08-29 22:55:04,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:04,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 1241 [2023-08-29 22:55:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:05,902 INFO L130 PetriNetUnfolder]: 5719/8734 cut-off events. [2023-08-29 22:55:05,902 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:55:05,909 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. [2023-08-29 22:55:05,958 INFO L137 encePairwiseOnDemand]: 1232/1241 looper letters, 169 selfloop transitions, 12 changer transitions 0/181 dead transitions. [2023-08-29 22:55:05,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 788 flow [2023-08-29 22:55:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:55:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:55:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3089 transitions. [2023-08-29 22:55:05,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148536126779479 [2023-08-29 22:55:05,967 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3089 transitions. [2023-08-29 22:55:05,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3089 transitions. [2023-08-29 22:55:05,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:05,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3089 transitions. [2023-08-29 22:55:05,974 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) [2023-08-29 22:55:05,986 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) [2023-08-29 22:55:05,991 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) [2023-08-29 22:55:05,991 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 154 flow. Second operand 6 states and 3089 transitions. [2023-08-29 22:55:05,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 181 transitions, 788 flow [2023-08-29 22:55:05,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 181 transitions, 787 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:05,997 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 245 flow [2023-08-29 22:55:05,998 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} [2023-08-29 22:55:05,999 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-29 22:55:05,999 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 245 flow [2023-08-29 22:55:06,001 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) [2023-08-29 22:55:06,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:06,002 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 22:55:06,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:06,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:06,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:06,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash 813096415, now seen corresponding path program 2 times [2023-08-29 22:55:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498034718] [2023-08-29 22:55:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:06,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:06,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498034718] [2023-08-29 22:55:06,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498034718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:06,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384763594] [2023-08-29 22:55:06,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:55:06,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:06,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:06,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:55:06,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:55:06,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:55:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 22:55:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:06,766 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:06,771 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 [2023-08-29 22:55:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:55:06,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384763594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:06,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:55:06,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2023-08-29 22:55:06,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669134921] [2023-08-29 22:55:06,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:06,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:55:06,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:55:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-29 22:55:07,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-29 22:55:07,274 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) [2023-08-29 22:55:07,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:07,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-29 22:55:07,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:08,756 INFO L130 PetriNetUnfolder]: 5719/8732 cut-off events. [2023-08-29 22:55:08,756 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-29 22:55:08,765 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. [2023-08-29 22:55:08,797 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 167 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2023-08-29 22:55:08,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 179 transitions, 835 flow [2023-08-29 22:55:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:55:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:55:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3618 transitions. [2023-08-29 22:55:08,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41648440197997005 [2023-08-29 22:55:08,808 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3618 transitions. [2023-08-29 22:55:08,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3618 transitions. [2023-08-29 22:55:08,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:08,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3618 transitions. [2023-08-29 22:55:08,818 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) [2023-08-29 22:55:08,831 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) [2023-08-29 22:55:08,834 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) [2023-08-29 22:55:08,834 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 245 flow. Second operand 7 states and 3618 transitions. [2023-08-29 22:55:08,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 179 transitions, 835 flow [2023-08-29 22:55:08,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 179 transitions, 815 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 22:55:08,838 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 229 flow [2023-08-29 22:55:08,839 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} [2023-08-29 22:55:08,839 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 22:55:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 229 flow [2023-08-29 22:55:08,841 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) [2023-08-29 22:55:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-08-29 22:55:08,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 22:55:09,046 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 [2023-08-29 22:55:09,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:09,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -558405069, now seen corresponding path program 1 times [2023-08-29 22:55:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:09,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675276005] [2023-08-29 22:55:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:09,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:55:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675276005] [2023-08-29 22:55:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675276005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646512002] [2023-08-29 22:55:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:09,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:09,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:09,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 22:55:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 22:55:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:55:09,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 22:55:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646512002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:09,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:09,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-29 22:55:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138632004] [2023-08-29 22:55:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 22:55:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 22:55:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-08-29 22:55:09,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-29 22:55:09,430 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) [2023-08-29 22:55:09,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:09,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-29 22:55:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:09,911 INFO L130 PetriNetUnfolder]: 1907/2920 cut-off events. [2023-08-29 22:55:09,911 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:55:09,915 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. [2023-08-29 22:55:09,926 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 57 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2023-08-29 22:55:09,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 365 flow [2023-08-29 22:55:09,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:55:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:55:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3518 transitions. [2023-08-29 22:55:09,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40497294808334294 [2023-08-29 22:55:09,937 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3518 transitions. [2023-08-29 22:55:09,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3518 transitions. [2023-08-29 22:55:09,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:09,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3518 transitions. [2023-08-29 22:55:09,946 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) [2023-08-29 22:55:09,957 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) [2023-08-29 22:55:09,959 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) [2023-08-29 22:55:09,959 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 229 flow. Second operand 7 states and 3518 transitions. [2023-08-29 22:55:09,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 365 flow [2023-08-29 22:55:09,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 340 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-29 22:55:09,964 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 260 flow [2023-08-29 22:55:09,964 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} [2023-08-29 22:55:09,966 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2023-08-29 22:55:09,966 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 260 flow [2023-08-29 22:55:09,968 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) [2023-08-29 22:55:09,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:09,968 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-29 22:55:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:10,176 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 [2023-08-29 22:55:10,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:10,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623345, now seen corresponding path program 2 times [2023-08-29 22:55:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:10,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293032462] [2023-08-29 22:55:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:10,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:10,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:10,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293032462] [2023-08-29 22:55:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293032462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:10,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:10,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:55:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727422987] [2023-08-29 22:55:10,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:55:10,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-08-29 22:55:10,612 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) [2023-08-29 22:55:10,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:10,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-08-29 22:55:10,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:10,985 INFO L130 PetriNetUnfolder]: 1415/2211 cut-off events. [2023-08-29 22:55:10,985 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 22:55:10,988 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. [2023-08-29 22:55:10,994 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-29 22:55:10,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 380 flow [2023-08-29 22:55:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1535 transitions. [2023-08-29 22:55:10,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41230190706419556 [2023-08-29 22:55:10,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1535 transitions. [2023-08-29 22:55:11,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1535 transitions. [2023-08-29 22:55:11,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:11,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1535 transitions. [2023-08-29 22:55:11,004 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) [2023-08-29 22:55:11,008 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) [2023-08-29 22:55:11,009 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) [2023-08-29 22:55:11,010 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 260 flow. Second operand 3 states and 1535 transitions. [2023-08-29 22:55:11,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 380 flow [2023-08-29 22:55:11,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 356 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-29 22:55:11,013 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 224 flow [2023-08-29 22:55:11,013 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} [2023-08-29 22:55:11,015 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 22:55:11,016 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 224 flow [2023-08-29 22:55:11,016 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) [2023-08-29 22:55:11,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:11,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2023-08-29 22:55:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:55:11,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:11,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1873623343, now seen corresponding path program 1 times [2023-08-29 22:55:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:11,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785764055] [2023-08-29 22:55:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-29 22:55:11,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:11,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785764055] [2023-08-29 22:55:11,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785764055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:11,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:11,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:55:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83864531] [2023-08-29 22:55:11,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:11,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:11,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:55:11,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-08-29 22:55:11,325 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) [2023-08-29 22:55:11,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:11,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-08-29 22:55:11,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:11,576 INFO L130 PetriNetUnfolder]: 923/1502 cut-off events. [2023-08-29 22:55:11,576 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 22:55:11,578 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. [2023-08-29 22:55:11,582 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 64 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-29 22:55:11,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 340 flow [2023-08-29 22:55:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1515 transitions. [2023-08-29 22:55:11,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40692989524576956 [2023-08-29 22:55:11,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1515 transitions. [2023-08-29 22:55:11,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1515 transitions. [2023-08-29 22:55:11,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:11,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1515 transitions. [2023-08-29 22:55:11,591 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) [2023-08-29 22:55:11,596 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) [2023-08-29 22:55:11,597 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) [2023-08-29 22:55:11,597 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 224 flow. Second operand 3 states and 1515 transitions. [2023-08-29 22:55:11,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 340 flow [2023-08-29 22:55:11,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:11,602 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 211 flow [2023-08-29 22:55:11,602 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} [2023-08-29 22:55:11,603 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-29 22:55:11,605 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 211 flow [2023-08-29 22:55:11,607 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) [2023-08-29 22:55:11,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:11,608 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-29 22:55:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 22:55:11,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:11,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 960788750, now seen corresponding path program 1 times [2023-08-29 22:55:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:11,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793267258] [2023-08-29 22:55:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:11,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:11,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793267258] [2023-08-29 22:55:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793267258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:11,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:55:11,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313081836] [2023-08-29 22:55:11,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:11,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:55:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 492 out of 1241 [2023-08-29 22:55:12,022 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) [2023-08-29 22:55:12,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:12,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 492 of 1241 [2023-08-29 22:55:12,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:12,322 INFO L130 PetriNetUnfolder]: 885/1431 cut-off events. [2023-08-29 22:55:12,323 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 22:55:12,325 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. [2023-08-29 22:55:12,329 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-29 22:55:12,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 333 flow [2023-08-29 22:55:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1531 transitions. [2023-08-29 22:55:12,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41122750470051034 [2023-08-29 22:55:12,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1531 transitions. [2023-08-29 22:55:12,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1531 transitions. [2023-08-29 22:55:12,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:12,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1531 transitions. [2023-08-29 22:55:12,338 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) [2023-08-29 22:55:12,344 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) [2023-08-29 22:55:12,345 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) [2023-08-29 22:55:12,345 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 211 flow. Second operand 3 states and 1531 transitions. [2023-08-29 22:55:12,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 333 flow [2023-08-29 22:55:12,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:12,348 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 208 flow [2023-08-29 22:55:12,348 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} [2023-08-29 22:55:12,350 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -9 predicate places. [2023-08-29 22:55:12,350 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 208 flow [2023-08-29 22:55:12,351 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) [2023-08-29 22:55:12,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:12,351 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-29 22:55:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:55:12,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:12,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 960788749, now seen corresponding path program 1 times [2023-08-29 22:55:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58894837] [2023-08-29 22:55:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-29 22:55:12,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58894837] [2023-08-29 22:55:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58894837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:12,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:55:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365510676] [2023-08-29 22:55:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:55:12,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 486 out of 1241 [2023-08-29 22:55:12,711 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) [2023-08-29 22:55:12,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:12,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 486 of 1241 [2023-08-29 22:55:12,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:12,938 INFO L130 PetriNetUnfolder]: 847/1360 cut-off events. [2023-08-29 22:55:12,938 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 22:55:12,940 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. [2023-08-29 22:55:12,943 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 60 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-08-29 22:55:12,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 326 flow [2023-08-29 22:55:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1511 transitions. [2023-08-29 22:55:12,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40585549288208433 [2023-08-29 22:55:12,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1511 transitions. [2023-08-29 22:55:12,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1511 transitions. [2023-08-29 22:55:12,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:12,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1511 transitions. [2023-08-29 22:55:12,954 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) [2023-08-29 22:55:12,959 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) [2023-08-29 22:55:12,960 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) [2023-08-29 22:55:12,960 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 208 flow. Second operand 3 states and 1511 transitions. [2023-08-29 22:55:12,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 326 flow [2023-08-29 22:55:12,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:12,962 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 205 flow [2023-08-29 22:55:12,962 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} [2023-08-29 22:55:12,963 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-08-29 22:55:12,963 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 205 flow [2023-08-29 22:55:12,963 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) [2023-08-29 22:55:12,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:12,964 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:12,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:55:12,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:12,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -280315447, now seen corresponding path program 1 times [2023-08-29 22:55:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:12,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669229735] [2023-08-29 22:55:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 22:55:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669229735] [2023-08-29 22:55:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669229735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:13,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:55:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368099616] [2023-08-29 22:55:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:55:13,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-29 22:55:13,279 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) [2023-08-29 22:55:13,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:13,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-29 22:55:13,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:13,511 INFO L130 PetriNetUnfolder]: 608/973 cut-off events. [2023-08-29 22:55:13,511 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 22:55:13,514 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. [2023-08-29 22:55:13,517 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-29 22:55:13,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 307 flow [2023-08-29 22:55:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:55:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:55:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1951 transitions. [2023-08-29 22:55:13,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930298146655923 [2023-08-29 22:55:13,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1951 transitions. [2023-08-29 22:55:13,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1951 transitions. [2023-08-29 22:55:13,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:13,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1951 transitions. [2023-08-29 22:55:13,528 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) [2023-08-29 22:55:13,535 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) [2023-08-29 22:55:13,536 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) [2023-08-29 22:55:13,536 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 205 flow. Second operand 4 states and 1951 transitions. [2023-08-29 22:55:13,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 307 flow [2023-08-29 22:55:13,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:55:13,538 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 198 flow [2023-08-29 22:55:13,538 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} [2023-08-29 22:55:13,539 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -13 predicate places. [2023-08-29 22:55:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 198 flow [2023-08-29 22:55:13,540 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) [2023-08-29 22:55:13,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:13,540 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:55:13,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:13,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -280315448, now seen corresponding path program 1 times [2023-08-29 22:55:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213320336] [2023-08-29 22:55:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-29 22:55:13,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:13,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213320336] [2023-08-29 22:55:13,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213320336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:13,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:55:13,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:55:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467369590] [2023-08-29 22:55:13,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:13,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:13,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:55:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-29 22:55:13,748 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) [2023-08-29 22:55:13,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:13,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-29 22:55:13,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:13,925 INFO L130 PetriNetUnfolder]: 447/712 cut-off events. [2023-08-29 22:55:13,925 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-29 22:55:13,926 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. [2023-08-29 22:55:13,927 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 49 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-29 22:55:13,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 290 flow [2023-08-29 22:55:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:55:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:55:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1946 transitions. [2023-08-29 22:55:13,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920225624496374 [2023-08-29 22:55:13,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1946 transitions. [2023-08-29 22:55:13,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1946 transitions. [2023-08-29 22:55:13,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:13,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1946 transitions. [2023-08-29 22:55:13,937 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) [2023-08-29 22:55:13,942 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) [2023-08-29 22:55:13,943 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) [2023-08-29 22:55:13,944 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 198 flow. Second operand 4 states and 1946 transitions. [2023-08-29 22:55:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 290 flow [2023-08-29 22:55:13,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:13,945 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 189 flow [2023-08-29 22:55:13,946 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} [2023-08-29 22:55:13,946 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -17 predicate places. [2023-08-29 22:55:13,946 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 189 flow [2023-08-29 22:55:13,947 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) [2023-08-29 22:55:13,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:13,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:13,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:55:13,947 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:13,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -280315445, now seen corresponding path program 1 times [2023-08-29 22:55:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:13,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508699522] [2023-08-29 22:55:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-29 22:55:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508699522] [2023-08-29 22:55:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508699522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:14,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831157809] [2023-08-29 22:55:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:14,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:14,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 22:55:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 22:55:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:14,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:14,527 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 [2023-08-29 22:55:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831157809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:14,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2023-08-29 22:55:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772268894] [2023-08-29 22:55:14,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:14,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 22:55:14,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 22:55:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-29 22:55:16,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 1241 [2023-08-29 22:55:16,289 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) [2023-08-29 22:55:16,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:16,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 1241 [2023-08-29 22:55:16,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:16,934 INFO L130 PetriNetUnfolder]: 1087/1716 cut-off events. [2023-08-29 22:55:16,934 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:55:16,939 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. [2023-08-29 22:55:16,944 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-08-29 22:55:16,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 529 flow [2023-08-29 22:55:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 22:55:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 22:55:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 4825 transitions. [2023-08-29 22:55:16,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887993553585818 [2023-08-29 22:55:16,955 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 4825 transitions. [2023-08-29 22:55:16,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 4825 transitions. [2023-08-29 22:55:16,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:16,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 4825 transitions. [2023-08-29 22:55:16,967 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) [2023-08-29 22:55:16,978 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) [2023-08-29 22:55:16,981 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) [2023-08-29 22:55:16,982 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 189 flow. Second operand 10 states and 4825 transitions. [2023-08-29 22:55:16,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 529 flow [2023-08-29 22:55:16,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:55:16,984 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 267 flow [2023-08-29 22:55:16,985 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} [2023-08-29 22:55:16,985 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -7 predicate places. [2023-08-29 22:55:16,985 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 267 flow [2023-08-29 22:55:16,987 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) [2023-08-29 22:55:16,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:16,988 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:16,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:17,193 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 [2023-08-29 22:55:17,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:17,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:17,193 INFO L85 PathProgramCache]: Analyzing trace with hash -280315446, now seen corresponding path program 1 times [2023-08-29 22:55:17,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:17,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97147606] [2023-08-29 22:55:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:17,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97147606] [2023-08-29 22:55:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97147606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576514487] [2023-08-29 22:55:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:17,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:17,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 22:55:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-29 22:55:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:17,577 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:17,578 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 [2023-08-29 22:55:17,710 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 22:55:17,711 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 [2023-08-29 22:55:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:18,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576514487] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:18,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:18,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2023-08-29 22:55:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121975336] [2023-08-29 22:55:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:55:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:55:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-08-29 22:55:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-29 22:55:18,899 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) [2023-08-29 22:55:18,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:18,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-29 22:55:18,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:19,260 INFO L130 PetriNetUnfolder]: 933/1464 cut-off events. [2023-08-29 22:55:19,261 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-08-29 22:55:19,265 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. [2023-08-29 22:55:19,269 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 62 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-08-29 22:55:19,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 442 flow [2023-08-29 22:55:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:55:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:55:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2434 transitions. [2023-08-29 22:55:19,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922643029814666 [2023-08-29 22:55:19,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2434 transitions. [2023-08-29 22:55:19,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2434 transitions. [2023-08-29 22:55:19,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:19,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2434 transitions. [2023-08-29 22:55:19,282 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) [2023-08-29 22:55:19,287 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) [2023-08-29 22:55:19,288 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) [2023-08-29 22:55:19,288 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 267 flow. Second operand 5 states and 2434 transitions. [2023-08-29 22:55:19,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 442 flow [2023-08-29 22:55:19,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 404 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-29 22:55:19,292 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 268 flow [2023-08-29 22:55:19,292 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} [2023-08-29 22:55:19,293 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -12 predicate places. [2023-08-29 22:55:19,293 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 268 flow [2023-08-29 22:55:19,294 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) [2023-08-29 22:55:19,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:19,294 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:19,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:19,500 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 [2023-08-29 22:55:19,500 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:19,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156475, now seen corresponding path program 1 times [2023-08-29 22:55:19,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:19,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483967748] [2023-08-29 22:55:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:19,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483967748] [2023-08-29 22:55:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483967748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:19,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596395983] [2023-08-29 22:55:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:19,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:19,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:19,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 22:55:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-29 22:55:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:19,929 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:19,930 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 [2023-08-29 22:55:19,957 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:19,957 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 [2023-08-29 22:55:20,102 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:55:20,102 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 [2023-08-29 22:55:20,116 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:55:20,116 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 [2023-08-29 22:55:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:20,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:20,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596395983] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:20,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:20,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2023-08-29 22:55:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122868762] [2023-08-29 22:55:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:20,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:55:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:55:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-08-29 22:55:21,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 1241 [2023-08-29 22:55:21,834 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) [2023-08-29 22:55:21,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:21,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 1241 [2023-08-29 22:55:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:22,267 INFO L130 PetriNetUnfolder]: 1317/2076 cut-off events. [2023-08-29 22:55:22,268 INFO L131 PetriNetUnfolder]: For 963/963 co-relation queries the response was YES. [2023-08-29 22:55:22,273 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. [2023-08-29 22:55:22,279 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 86 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2023-08-29 22:55:22,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 600 flow [2023-08-29 22:55:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:55:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:55:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2433 transitions. [2023-08-29 22:55:22,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210314262691376 [2023-08-29 22:55:22,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2433 transitions. [2023-08-29 22:55:22,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2433 transitions. [2023-08-29 22:55:22,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:22,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2433 transitions. [2023-08-29 22:55:22,289 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) [2023-08-29 22:55:22,293 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) [2023-08-29 22:55:22,294 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) [2023-08-29 22:55:22,294 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 268 flow. Second operand 5 states and 2433 transitions. [2023-08-29 22:55:22,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 600 flow [2023-08-29 22:55:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 579 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 22:55:22,299 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 274 flow [2023-08-29 22:55:22,299 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} [2023-08-29 22:55:22,299 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -10 predicate places. [2023-08-29 22:55:22,299 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 274 flow [2023-08-29 22:55:22,300 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) [2023-08-29 22:55:22,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:22,301 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:22,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:22,506 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 [2023-08-29 22:55:22,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:22,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1197156476, now seen corresponding path program 1 times [2023-08-29 22:55:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:22,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576989425] [2023-08-29 22:55:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:22,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576989425] [2023-08-29 22:55:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576989425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014887601] [2023-08-29 22:55:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:22,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:22,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 22:55:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 22:55:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:55:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:23,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:23,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014887601] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:23,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:23,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2023-08-29 22:55:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023389933] [2023-08-29 22:55:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:23,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 22:55:23,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 22:55:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-08-29 22:55:23,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1241 [2023-08-29 22:55:23,973 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) [2023-08-29 22:55:23,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:23,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1241 [2023-08-29 22:55:23,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:24,417 INFO L130 PetriNetUnfolder]: 1189/1874 cut-off events. [2023-08-29 22:55:24,417 INFO L131 PetriNetUnfolder]: For 1068/1068 co-relation queries the response was YES. [2023-08-29 22:55:24,421 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. [2023-08-29 22:55:24,425 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 83 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-29 22:55:24,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 591 flow [2023-08-29 22:55:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:55:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:55:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2441 transitions. [2023-08-29 22:55:24,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393392425463336 [2023-08-29 22:55:24,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2441 transitions. [2023-08-29 22:55:24,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2441 transitions. [2023-08-29 22:55:24,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:24,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2441 transitions. [2023-08-29 22:55:24,434 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) [2023-08-29 22:55:24,439 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) [2023-08-29 22:55:24,440 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) [2023-08-29 22:55:24,440 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 274 flow. Second operand 5 states and 2441 transitions. [2023-08-29 22:55:24,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 591 flow [2023-08-29 22:55:24,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 585 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:55:24,443 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 286 flow [2023-08-29 22:55:24,443 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} [2023-08-29 22:55:24,443 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2023-08-29 22:55:24,444 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 286 flow [2023-08-29 22:55:24,445 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) [2023-08-29 22:55:24,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:24,445 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:24,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:24,651 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 [2023-08-29 22:55:24,651 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:24,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850856, now seen corresponding path program 1 times [2023-08-29 22:55:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883461320] [2023-08-29 22:55:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-29 22:55:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883461320] [2023-08-29 22:55:24,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883461320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:24,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53853603] [2023-08-29 22:55:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:24,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:24,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:55:24,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 22:55:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 22:55:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:25,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:55:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:25,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53853603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:25,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:25,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2023-08-29 22:55:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710099732] [2023-08-29 22:55:25,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 22:55:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 22:55:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-29 22:55:27,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 469 out of 1241 [2023-08-29 22:55:27,750 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) [2023-08-29 22:55:27,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:27,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 469 of 1241 [2023-08-29 22:55:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:28,938 INFO L130 PetriNetUnfolder]: 2617/4060 cut-off events. [2023-08-29 22:55:28,938 INFO L131 PetriNetUnfolder]: For 3255/3255 co-relation queries the response was YES. [2023-08-29 22:55:28,946 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. [2023-08-29 22:55:28,956 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 176 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2023-08-29 22:55:28,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 194 transitions, 1284 flow [2023-08-29 22:55:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 22:55:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 22:55:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5788 transitions. [2023-08-29 22:55:28,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866505506312116 [2023-08-29 22:55:28,966 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5788 transitions. [2023-08-29 22:55:28,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5788 transitions. [2023-08-29 22:55:28,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:28,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5788 transitions. [2023-08-29 22:55:28,974 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) [2023-08-29 22:55:28,984 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) [2023-08-29 22:55:28,985 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) [2023-08-29 22:55:28,986 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 286 flow. Second operand 12 states and 5788 transitions. [2023-08-29 22:55:28,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 194 transitions, 1284 flow [2023-08-29 22:55:28,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 194 transitions, 1271 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:55:28,992 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 364 flow [2023-08-29 22:55:28,992 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} [2023-08-29 22:55:28,992 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-29 22:55:28,992 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 364 flow [2023-08-29 22:55:28,994 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) [2023-08-29 22:55:28,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:28,994 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:29,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-29 22:55:29,199 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 [2023-08-29 22:55:29,200 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:29,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1542850857, now seen corresponding path program 1 times [2023-08-29 22:55:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566777178] [2023-08-29 22:55:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:29,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:29,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566777178] [2023-08-29 22:55:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566777178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:29,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992473169] [2023-08-29 22:55:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:29,461 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) [2023-08-29 22:55:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 22:55:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 22:55:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:29,687 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:29,687 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 [2023-08-29 22:55:29,717 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:29,717 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 [2023-08-29 22:55:29,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:29,843 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 [2023-08-29 22:55:29,851 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:55:29,852 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 [2023-08-29 22:55:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:29,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:36,050 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) [2023-08-29 22:55:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992473169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:38,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-29 22:55:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137453212] [2023-08-29 22:55:38,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-29 22:55:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-29 22:55:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-08-29 22:55:41,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 465 out of 1241 [2023-08-29 22:55:41,711 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) [2023-08-29 22:55:41,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:41,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 465 of 1241 [2023-08-29 22:55:41,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:42,957 INFO L130 PetriNetUnfolder]: 1957/3104 cut-off events. [2023-08-29 22:55:42,958 INFO L131 PetriNetUnfolder]: For 4610/4610 co-relation queries the response was YES. [2023-08-29 22:55:42,967 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. [2023-08-29 22:55:42,975 INFO L137 encePairwiseOnDemand]: 1233/1241 looper letters, 173 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2023-08-29 22:55:42,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1280 flow [2023-08-29 22:55:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 22:55:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 22:55:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 7597 transitions. [2023-08-29 22:55:42,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826047542304593 [2023-08-29 22:55:42,987 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 7597 transitions. [2023-08-29 22:55:42,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 7597 transitions. [2023-08-29 22:55:42,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:42,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 7597 transitions. [2023-08-29 22:55:42,997 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) [2023-08-29 22:55:43,010 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) [2023-08-29 22:55:43,012 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) [2023-08-29 22:55:43,012 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 364 flow. Second operand 16 states and 7597 transitions. [2023-08-29 22:55:43,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1280 flow [2023-08-29 22:55:43,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 188 transitions, 1233 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-29 22:55:43,025 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 331 flow [2023-08-29 22:55:43,025 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} [2023-08-29 22:55:43,025 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2023-08-29 22:55:43,026 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 331 flow [2023-08-29 22:55:43,027 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) [2023-08-29 22:55:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:43,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:43,233 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 [2023-08-29 22:55:43,234 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:43,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1882735610, now seen corresponding path program 1 times [2023-08-29 22:55:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:43,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354614649] [2023-08-29 22:55:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:43,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354614649] [2023-08-29 22:55:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354614649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578606508] [2023-08-29 22:55:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:43,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:43,581 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) [2023-08-29 22:55:43,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 22:55:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:55:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:44,471 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 [2023-08-29 22:55:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578606508] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:45,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-29 22:55:45,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 16 [2023-08-29 22:55:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791726834] [2023-08-29 22:55:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:55:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:55:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-29 22:55:45,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 485 out of 1241 [2023-08-29 22:55:45,363 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) [2023-08-29 22:55:45,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:45,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 485 of 1241 [2023-08-29 22:55:45,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:46,193 INFO L130 PetriNetUnfolder]: 2187/3522 cut-off events. [2023-08-29 22:55:46,193 INFO L131 PetriNetUnfolder]: For 4160/4160 co-relation queries the response was YES. [2023-08-29 22:55:46,202 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. [2023-08-29 22:55:46,213 INFO L137 encePairwiseOnDemand]: 1235/1241 looper letters, 79 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-29 22:55:46,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 598 flow [2023-08-29 22:55:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:55:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:55:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1514 transitions. [2023-08-29 22:55:46,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40666129465484824 [2023-08-29 22:55:46,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1514 transitions. [2023-08-29 22:55:46,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1514 transitions. [2023-08-29 22:55:46,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:46,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1514 transitions. [2023-08-29 22:55:46,220 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) [2023-08-29 22:55:46,222 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) [2023-08-29 22:55:46,223 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) [2023-08-29 22:55:46,223 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 331 flow. Second operand 3 states and 1514 transitions. [2023-08-29 22:55:46,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 598 flow [2023-08-29 22:55:46,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 540 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-29 22:55:46,229 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 305 flow [2023-08-29 22:55:46,229 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} [2023-08-29 22:55:46,229 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-29 22:55:46,230 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 305 flow [2023-08-29 22:55:46,230 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) [2023-08-29 22:55:46,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:46,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:46,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:46,437 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 [2023-08-29 22:55:46,437 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:46,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174332, now seen corresponding path program 2 times [2023-08-29 22:55:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:46,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118689455] [2023-08-29 22:55:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118689455] [2023-08-29 22:55:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118689455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852781892] [2023-08-29 22:55:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:55:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:47,128 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) [2023-08-29 22:55:47,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 22:55:47,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 22:55:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:55:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-29 22:55:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:47,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-29 22:55:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:55:47,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:47,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852781892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:47,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:55:47,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-08-29 22:55:47,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30412590] [2023-08-29 22:55:47,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:47,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:55:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:55:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-29 22:55:47,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-29 22:55:47,962 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) [2023-08-29 22:55:47,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:47,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-29 22:55:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:48,868 INFO L130 PetriNetUnfolder]: 2101/3444 cut-off events. [2023-08-29 22:55:48,869 INFO L131 PetriNetUnfolder]: For 3422/3422 co-relation queries the response was YES. [2023-08-29 22:55:48,875 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. [2023-08-29 22:55:48,881 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 217 selfloop transitions, 7 changer transitions 0/224 dead transitions. [2023-08-29 22:55:48,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 224 transitions, 1536 flow [2023-08-29 22:55:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 22:55:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 22:55:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4496 transitions. [2023-08-29 22:55:48,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025427522607216 [2023-08-29 22:55:48,885 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4496 transitions. [2023-08-29 22:55:48,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4496 transitions. [2023-08-29 22:55:48,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:48,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4496 transitions. [2023-08-29 22:55:48,891 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) [2023-08-29 22:55:48,897 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) [2023-08-29 22:55:48,898 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) [2023-08-29 22:55:48,899 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 305 flow. Second operand 9 states and 4496 transitions. [2023-08-29 22:55:48,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 224 transitions, 1536 flow [2023-08-29 22:55:48,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 224 transitions, 1512 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 22:55:48,911 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 295 flow [2023-08-29 22:55:48,911 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} [2023-08-29 22:55:48,911 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2023-08-29 22:55:48,912 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 295 flow [2023-08-29 22:55:48,912 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) [2023-08-29 22:55:48,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:48,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:49,118 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 [2023-08-29 22:55:49,118 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:49,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1674174331, now seen corresponding path program 2 times [2023-08-29 22:55:49,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:49,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40863422] [2023-08-29 22:55:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:49,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:49,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40863422] [2023-08-29 22:55:49,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40863422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:49,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111586279] [2023-08-29 22:55:49,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 22:55:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:49,649 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) [2023-08-29 22:55:49,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 22:55:49,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 22:55:49,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 22:55:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-29 22:55:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:49,883 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:49,883 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 [2023-08-29 22:55:49,913 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:49,914 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 [2023-08-29 22:55:49,989 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:55:49,990 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 [2023-08-29 22:55:50,003 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:55:50,004 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 [2023-08-29 22:55:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-08-29 22:55:50,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 22:55:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111586279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:55:50,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 22:55:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-08-29 22:55:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699160336] [2023-08-29 22:55:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:55:50,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:55:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:55:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-29 22:55:50,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1241 [2023-08-29 22:55:50,604 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) [2023-08-29 22:55:50,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:55:50,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1241 [2023-08-29 22:55:50,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:55:51,133 INFO L130 PetriNetUnfolder]: 1815/2986 cut-off events. [2023-08-29 22:55:51,133 INFO L131 PetriNetUnfolder]: For 2041/2041 co-relation queries the response was YES. [2023-08-29 22:55:51,138 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. [2023-08-29 22:55:51,143 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 55 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-29 22:55:51,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 405 flow [2023-08-29 22:55:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:55:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:55:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2473 transitions. [2023-08-29 22:55:51,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398549556809025 [2023-08-29 22:55:51,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2473 transitions. [2023-08-29 22:55:51,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2473 transitions. [2023-08-29 22:55:51,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:55:51,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2473 transitions. [2023-08-29 22:55:51,148 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) [2023-08-29 22:55:51,151 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) [2023-08-29 22:55:51,151 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) [2023-08-29 22:55:51,151 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 295 flow. Second operand 5 states and 2473 transitions. [2023-08-29 22:55:51,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 405 flow [2023-08-29 22:55:51,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 392 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 22:55:51,155 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 282 flow [2023-08-29 22:55:51,155 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} [2023-08-29 22:55:51,156 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-29 22:55:51,156 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 282 flow [2023-08-29 22:55:51,156 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) [2023-08-29 22:55:51,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:55:51,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:55:51,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-29 22:55:51,362 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 [2023-08-29 22:55:51,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:55:51,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:55:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1762652807, now seen corresponding path program 1 times [2023-08-29 22:55:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:55:51,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49416013] [2023-08-29 22:55:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:51,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:55:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-29 22:55:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:55:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49416013] [2023-08-29 22:55:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49416013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:55:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494750172] [2023-08-29 22:55:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:55:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:55:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:55:51,689 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) [2023-08-29 22:55:51,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 22:55:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:55:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 22:55:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:55:51,935 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:51,935 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 [2023-08-29 22:55:51,965 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-29 22:55:51,965 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 [2023-08-29 22:55:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 22:55:52,086 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 [2023-08-29 22:55:52,092 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 22:55:52,093 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 [2023-08-29 22:55:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:55:52,509 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 [2023-08-29 22:55:52,517 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 [2023-08-29 22:55:58,664 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) [2023-08-29 22:55:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:55:58,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494750172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:55:58,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:55:58,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-29 22:55:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311551314] [2023-08-29 22:55:58,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:55:58,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 22:55:58,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:55:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 22:55:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-29 22:56:03,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 460 out of 1241 [2023-08-29 22:56:03,463 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) [2023-08-29 22:56:03,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:03,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 460 of 1241 [2023-08-29 22:56:03,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:04,936 INFO L130 PetriNetUnfolder]: 3237/5260 cut-off events. [2023-08-29 22:56:04,936 INFO L131 PetriNetUnfolder]: For 2427/2427 co-relation queries the response was YES. [2023-08-29 22:56:04,946 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. [2023-08-29 22:56:04,957 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 154 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2023-08-29 22:56:04,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 176 transitions, 1083 flow [2023-08-29 22:56:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 22:56:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 22:56:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 7963 transitions. [2023-08-29 22:56:04,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37744703038346683 [2023-08-29 22:56:04,963 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 7963 transitions. [2023-08-29 22:56:04,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 7963 transitions. [2023-08-29 22:56:04,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:04,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 7963 transitions. [2023-08-29 22:56:04,974 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) [2023-08-29 22:56:04,987 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) [2023-08-29 22:56:04,989 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) [2023-08-29 22:56:04,990 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 282 flow. Second operand 17 states and 7963 transitions. [2023-08-29 22:56:04,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 176 transitions, 1083 flow [2023-08-29 22:56:04,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 176 transitions, 1078 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:56:04,997 INFO L231 Difference]: Finished difference. Result has 92 places, 66 transitions, 419 flow [2023-08-29 22:56:04,997 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} [2023-08-29 22:56:04,997 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2023-08-29 22:56:04,997 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 66 transitions, 419 flow [2023-08-29 22:56:04,999 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) [2023-08-29 22:56:04,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:05,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:05,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:05,209 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 [2023-08-29 22:56:05,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:05,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2057973880, now seen corresponding path program 1 times [2023-08-29 22:56:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:05,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372011166] [2023-08-29 22:56:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:05,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:05,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372011166] [2023-08-29 22:56:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372011166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:05,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:05,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158695427] [2023-08-29 22:56:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:56:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:05,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:56:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:56:05,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-29 22:56:05,866 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) [2023-08-29 22:56:05,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:05,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-29 22:56:05,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:06,796 INFO L130 PetriNetUnfolder]: 3236/5264 cut-off events. [2023-08-29 22:56:06,796 INFO L131 PetriNetUnfolder]: For 4028/4028 co-relation queries the response was YES. [2023-08-29 22:56:06,810 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. [2023-08-29 22:56:06,823 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 79 selfloop transitions, 1 changer transitions 5/85 dead transitions. [2023-08-29 22:56:06,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 645 flow [2023-08-29 22:56:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:56:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:56:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1976 transitions. [2023-08-29 22:56:06,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980660757453666 [2023-08-29 22:56:06,826 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1976 transitions. [2023-08-29 22:56:06,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1976 transitions. [2023-08-29 22:56:06,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:06,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1976 transitions. [2023-08-29 22:56:06,828 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) [2023-08-29 22:56:06,832 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) [2023-08-29 22:56:06,832 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) [2023-08-29 22:56:06,832 INFO L175 Difference]: Start difference. First operand has 92 places, 66 transitions, 419 flow. Second operand 4 states and 1976 transitions. [2023-08-29 22:56:06,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 645 flow [2023-08-29 22:56:06,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 621 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-29 22:56:06,846 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 402 flow [2023-08-29 22:56:06,846 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} [2023-08-29 22:56:06,847 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2023-08-29 22:56:06,847 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 402 flow [2023-08-29 22:56:06,847 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) [2023-08-29 22:56:06,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:06,847 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 22:56:06,848 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:06,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1400394772, now seen corresponding path program 2 times [2023-08-29 22:56:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:06,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60391668] [2023-08-29 22:56:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:07,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:07,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60391668] [2023-08-29 22:56:07,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60391668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:07,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:07,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526406252] [2023-08-29 22:56:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:56:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:56:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:56:07,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-29 22:56:07,506 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) [2023-08-29 22:56:07,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:07,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-29 22:56:07,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:08,542 INFO L130 PetriNetUnfolder]: 3233/5255 cut-off events. [2023-08-29 22:56:08,543 INFO L131 PetriNetUnfolder]: For 4437/4437 co-relation queries the response was YES. [2023-08-29 22:56:08,553 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. [2023-08-29 22:56:08,563 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 104 selfloop transitions, 1 changer transitions 5/110 dead transitions. [2023-08-29 22:56:08,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 110 transitions, 908 flow [2023-08-29 22:56:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:56:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:56:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1989 transitions. [2023-08-29 22:56:08,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2023-08-29 22:56:08,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1989 transitions. [2023-08-29 22:56:08,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1989 transitions. [2023-08-29 22:56:08,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:08,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1989 transitions. [2023-08-29 22:56:08,567 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) [2023-08-29 22:56:08,569 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) [2023-08-29 22:56:08,569 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) [2023-08-29 22:56:08,570 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 402 flow. Second operand 4 states and 1989 transitions. [2023-08-29 22:56:08,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 110 transitions, 908 flow [2023-08-29 22:56:08,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 902 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:56:08,578 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 406 flow [2023-08-29 22:56:08,578 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} [2023-08-29 22:56:08,578 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-08-29 22:56:08,579 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 406 flow [2023-08-29 22:56:08,579 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) [2023-08-29 22:56:08,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:08,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:08,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 22:56:08,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:08,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 738807776, now seen corresponding path program 1 times [2023-08-29 22:56:08,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:08,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999005834] [2023-08-29 22:56:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:08,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:08,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:08,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999005834] [2023-08-29 22:56:08,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999005834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:08,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:08,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474339686] [2023-08-29 22:56:08,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:08,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:08,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-08-29 22:56:08,753 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) [2023-08-29 22:56:08,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:08,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-08-29 22:56:08,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:09,777 INFO L130 PetriNetUnfolder]: 2977/4832 cut-off events. [2023-08-29 22:56:09,777 INFO L131 PetriNetUnfolder]: For 4794/4794 co-relation queries the response was YES. [2023-08-29 22:56:09,787 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. [2023-08-29 22:56:09,797 INFO L137 encePairwiseOnDemand]: 1238/1241 looper letters, 102 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-29 22:56:09,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 884 flow [2023-08-29 22:56:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1548 transitions. [2023-08-29 22:56:09,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41579371474617244 [2023-08-29 22:56:09,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1548 transitions. [2023-08-29 22:56:09,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1548 transitions. [2023-08-29 22:56:09,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:09,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1548 transitions. [2023-08-29 22:56:09,801 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) [2023-08-29 22:56:09,803 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) [2023-08-29 22:56:09,804 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) [2023-08-29 22:56:09,804 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 406 flow. Second operand 3 states and 1548 transitions. [2023-08-29 22:56:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 884 flow [2023-08-29 22:56:09,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 104 transitions, 879 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 22:56:09,815 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 409 flow [2023-08-29 22:56:09,815 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} [2023-08-29 22:56:09,815 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2023-08-29 22:56:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 409 flow [2023-08-29 22:56:09,816 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) [2023-08-29 22:56:09,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:09,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 22:56:09,816 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:09,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2041561843, now seen corresponding path program 1 times [2023-08-29 22:56:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611319725] [2023-08-29 22:56:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611319725] [2023-08-29 22:56:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611319725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:09,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:09,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043224492] [2023-08-29 22:56:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:09,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:09,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:09,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1241 [2023-08-29 22:56:09,983 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) [2023-08-29 22:56:09,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:09,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1241 [2023-08-29 22:56:09,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:11,103 INFO L130 PetriNetUnfolder]: 3014/4861 cut-off events. [2023-08-29 22:56:11,104 INFO L131 PetriNetUnfolder]: For 5400/5400 co-relation queries the response was YES. [2023-08-29 22:56:11,121 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. [2023-08-29 22:56:11,136 INFO L137 encePairwiseOnDemand]: 1236/1241 looper letters, 80 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-29 22:56:11,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 644 flow [2023-08-29 22:56:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1541 transitions. [2023-08-29 22:56:11,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41391351060972337 [2023-08-29 22:56:11,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1541 transitions. [2023-08-29 22:56:11,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1541 transitions. [2023-08-29 22:56:11,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:11,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1541 transitions. [2023-08-29 22:56:11,140 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) [2023-08-29 22:56:11,143 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) [2023-08-29 22:56:11,144 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) [2023-08-29 22:56:11,144 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 409 flow. Second operand 3 states and 1541 transitions. [2023-08-29 22:56:11,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 644 flow [2023-08-29 22:56:11,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:56:11,155 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 436 flow [2023-08-29 22:56:11,155 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} [2023-08-29 22:56:11,156 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2023-08-29 22:56:11,156 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 436 flow [2023-08-29 22:56:11,156 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) [2023-08-29 22:56:11,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:11,156 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:11,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 22:56:11,157 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:11,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:11,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1157247728, now seen corresponding path program 1 times [2023-08-29 22:56:11,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:11,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811140666] [2023-08-29 22:56:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:11,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-29 22:56:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811140666] [2023-08-29 22:56:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811140666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:11,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:11,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:11,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135655060] [2023-08-29 22:56:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:11,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 495 out of 1241 [2023-08-29 22:56:11,409 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) [2023-08-29 22:56:11,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:11,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 495 of 1241 [2023-08-29 22:56:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:12,461 INFO L130 PetriNetUnfolder]: 3008/4855 cut-off events. [2023-08-29 22:56:12,461 INFO L131 PetriNetUnfolder]: For 6087/6087 co-relation queries the response was YES. [2023-08-29 22:56:12,473 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. [2023-08-29 22:56:12,484 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 114 selfloop transitions, 2 changer transitions 2/118 dead transitions. [2023-08-29 22:56:12,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 986 flow [2023-08-29 22:56:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1549 transitions. [2023-08-29 22:56:12,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41606231533709376 [2023-08-29 22:56:12,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1549 transitions. [2023-08-29 22:56:12,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1549 transitions. [2023-08-29 22:56:12,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:12,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1549 transitions. [2023-08-29 22:56:12,489 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) [2023-08-29 22:56:12,491 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) [2023-08-29 22:56:12,491 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) [2023-08-29 22:56:12,491 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 436 flow. Second operand 3 states and 1549 transitions. [2023-08-29 22:56:12,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 986 flow [2023-08-29 22:56:12,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 979 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:12,503 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 442 flow [2023-08-29 22:56:12,503 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} [2023-08-29 22:56:12,504 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-08-29 22:56:12,504 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 442 flow [2023-08-29 22:56:12,504 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) [2023-08-29 22:56:12,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:12,505 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 22:56:12,505 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:12,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1416703408, now seen corresponding path program 2 times [2023-08-29 22:56:12,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:12,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520866134] [2023-08-29 22:56:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-29 22:56:12,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520866134] [2023-08-29 22:56:12,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520866134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:12,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 22:56:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810278175] [2023-08-29 22:56:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:12,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:56:12,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:56:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:56:12,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1241 [2023-08-29 22:56:12,726 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) [2023-08-29 22:56:12,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:12,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1241 [2023-08-29 22:56:12,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:13,465 INFO L130 PetriNetUnfolder]: 2713/4364 cut-off events. [2023-08-29 22:56:13,465 INFO L131 PetriNetUnfolder]: For 6889/6889 co-relation queries the response was YES. [2023-08-29 22:56:13,477 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. [2023-08-29 22:56:13,487 INFO L137 encePairwiseOnDemand]: 1237/1241 looper letters, 70 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-08-29 22:56:13,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 76 transitions, 629 flow [2023-08-29 22:56:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:56:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:56:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1536 transitions. [2023-08-29 22:56:13,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125705076551168 [2023-08-29 22:56:13,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1536 transitions. [2023-08-29 22:56:13,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1536 transitions. [2023-08-29 22:56:13,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:13,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1536 transitions. [2023-08-29 22:56:13,493 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) [2023-08-29 22:56:13,495 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) [2023-08-29 22:56:13,496 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) [2023-08-29 22:56:13,496 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 442 flow. Second operand 3 states and 1536 transitions. [2023-08-29 22:56:13,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 76 transitions, 629 flow [2023-08-29 22:56:13,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 621 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 22:56:13,507 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 457 flow [2023-08-29 22:56:13,507 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} [2023-08-29 22:56:13,507 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2023-08-29 22:56:13,508 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 457 flow [2023-08-29 22:56:13,508 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) [2023-08-29 22:56:13,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:13,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 22:56:13,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 22:56:13,509 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 637856133, now seen corresponding path program 1 times [2023-08-29 22:56:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819099157] [2023-08-29 22:56:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:56:13,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819099157] [2023-08-29 22:56:13,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819099157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:56:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407980731] [2023-08-29 22:56:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:56:13,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:56:13,978 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) [2023-08-29 22:56:13,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 22:56:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 22:56:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:14,717 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 [2023-08-29 22:56:14,724 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 [2023-08-29 22:56:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:56:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:56:15,170 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 [2023-08-29 22:56:15,175 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 [2023-08-29 22:56:15,256 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 [2023-08-29 22:56:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 22:56:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407980731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:56:15,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:56:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-29 22:56:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610812780] [2023-08-29 22:56:15,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:56:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-29 22:56:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-29 22:56:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-08-29 22:56:18,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 470 out of 1241 [2023-08-29 22:56:18,499 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) [2023-08-29 22:56:18,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:18,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 470 of 1241 [2023-08-29 22:56:18,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:20,135 INFO L130 PetriNetUnfolder]: 3533/5666 cut-off events. [2023-08-29 22:56:20,135 INFO L131 PetriNetUnfolder]: For 8282/8282 co-relation queries the response was YES. [2023-08-29 22:56:20,147 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. [2023-08-29 22:56:20,159 INFO L137 encePairwiseOnDemand]: 1227/1241 looper letters, 186 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2023-08-29 22:56:20,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 214 transitions, 1535 flow [2023-08-29 22:56:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 22:56:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 22:56:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7224 transitions. [2023-08-29 22:56:20,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880741337630943 [2023-08-29 22:56:20,164 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7224 transitions. [2023-08-29 22:56:20,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7224 transitions. [2023-08-29 22:56:20,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:20,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7224 transitions. [2023-08-29 22:56:20,171 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) [2023-08-29 22:56:20,182 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) [2023-08-29 22:56:20,184 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) [2023-08-29 22:56:20,184 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 457 flow. Second operand 15 states and 7224 transitions. [2023-08-29 22:56:20,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 214 transitions, 1535 flow [2023-08-29 22:56:20,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 214 transitions, 1513 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-29 22:56:20,196 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 623 flow [2023-08-29 22:56:20,196 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} [2023-08-29 22:56:20,197 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 32 predicate places. [2023-08-29 22:56:20,197 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 623 flow [2023-08-29 22:56:20,199 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) [2023-08-29 22:56:20,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:20,200 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] [2023-08-29 22:56:20,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 22:56:20,406 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 [2023-08-29 22:56:20,406 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:20,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1725056729, now seen corresponding path program 1 times [2023-08-29 22:56:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534452090] [2023-08-29 22:56:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:21,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:21,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534452090] [2023-08-29 22:56:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534452090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:21,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:21,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:56:21,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466954503] [2023-08-29 22:56:21,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:21,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:56:21,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:56:21,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:56:21,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 1241 [2023-08-29 22:56:21,573 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) [2023-08-29 22:56:21,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:21,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 1241 [2023-08-29 22:56:21,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:22,720 INFO L130 PetriNetUnfolder]: 3806/6111 cut-off events. [2023-08-29 22:56:22,720 INFO L131 PetriNetUnfolder]: For 11988/11988 co-relation queries the response was YES. [2023-08-29 22:56:22,733 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. [2023-08-29 22:56:22,745 INFO L137 encePairwiseOnDemand]: 1231/1241 looper letters, 104 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2023-08-29 22:56:22,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 1047 flow [2023-08-29 22:56:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:56:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:56:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2476 transitions. [2023-08-29 22:56:22,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990330378726833 [2023-08-29 22:56:22,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2476 transitions. [2023-08-29 22:56:22,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2476 transitions. [2023-08-29 22:56:22,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:22,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2476 transitions. [2023-08-29 22:56:22,749 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) [2023-08-29 22:56:22,752 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) [2023-08-29 22:56:22,753 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) [2023-08-29 22:56:22,753 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 623 flow. Second operand 5 states and 2476 transitions. [2023-08-29 22:56:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 1047 flow [2023-08-29 22:56:22,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 119 transitions, 1000 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-29 22:56:22,767 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 687 flow [2023-08-29 22:56:22,767 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} [2023-08-29 22:56:22,768 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2023-08-29 22:56:22,768 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 687 flow [2023-08-29 22:56:22,769 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) [2023-08-29 22:56:22,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:22,769 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] [2023-08-29 22:56:22,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 22:56:22,769 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:22,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -972902513, now seen corresponding path program 2 times [2023-08-29 22:56:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:22,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044705911] [2023-08-29 22:56:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:22,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-29 22:56:23,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044705911] [2023-08-29 22:56:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044705911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:23,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:23,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 22:56:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004580291] [2023-08-29 22:56:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 22:56:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 22:56:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-29 22:56:24,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 1241 [2023-08-29 22:56:24,351 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) [2023-08-29 22:56:24,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:24,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 1241 [2023-08-29 22:56:24,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:25,617 INFO L130 PetriNetUnfolder]: 3930/6319 cut-off events. [2023-08-29 22:56:25,617 INFO L131 PetriNetUnfolder]: For 12872/12872 co-relation queries the response was YES. [2023-08-29 22:56:25,641 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. [2023-08-29 22:56:25,657 INFO L137 encePairwiseOnDemand]: 1230/1241 looper letters, 103 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2023-08-29 22:56:25,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 120 transitions, 1083 flow [2023-08-29 22:56:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 22:56:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 22:56:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3384 transitions. [2023-08-29 22:56:25,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38954759986186255 [2023-08-29 22:56:25,660 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3384 transitions. [2023-08-29 22:56:25,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3384 transitions. [2023-08-29 22:56:25,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:25,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3384 transitions. [2023-08-29 22:56:25,662 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) [2023-08-29 22:56:25,665 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) [2023-08-29 22:56:25,666 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) [2023-08-29 22:56:25,666 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 687 flow. Second operand 7 states and 3384 transitions. [2023-08-29 22:56:25,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 120 transitions, 1083 flow [2023-08-29 22:56:25,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 120 transitions, 1083 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:56:25,688 INFO L231 Difference]: Finished difference. Result has 111 places, 87 transitions, 767 flow [2023-08-29 22:56:25,688 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} [2023-08-29 22:56:25,688 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2023-08-29 22:56:25,688 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 87 transitions, 767 flow [2023-08-29 22:56:25,689 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) [2023-08-29 22:56:25,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:25,689 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] [2023-08-29 22:56:25,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 22:56:25,689 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:25,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1341286550, now seen corresponding path program 1 times [2023-08-29 22:56:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:25,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680904462] [2023-08-29 22:56:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:25,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-29 22:56:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:25,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680904462] [2023-08-29 22:56:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680904462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:56:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:56:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:56:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189136299] [2023-08-29 22:56:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:56:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 22:56:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:56:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 22:56:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 22:56:26,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 1241 [2023-08-29 22:56:26,036 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) [2023-08-29 22:56:26,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:56:26,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 1241 [2023-08-29 22:56:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:56:27,858 INFO L130 PetriNetUnfolder]: 5585/9003 cut-off events. [2023-08-29 22:56:27,858 INFO L131 PetriNetUnfolder]: For 22515/22515 co-relation queries the response was YES. [2023-08-29 22:56:27,880 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. [2023-08-29 22:56:27,900 INFO L137 encePairwiseOnDemand]: 1234/1241 looper letters, 97 selfloop transitions, 22 changer transitions 9/128 dead transitions. [2023-08-29 22:56:27,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 128 transitions, 1328 flow [2023-08-29 22:56:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:56:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:56:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-29 22:56:27,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40713134568896053 [2023-08-29 22:56:27,902 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-29 22:56:27,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-29 22:56:27,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:56:27,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-29 22:56:27,904 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) [2023-08-29 22:56:27,906 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) [2023-08-29 22:56:27,906 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) [2023-08-29 22:56:27,906 INFO L175 Difference]: Start difference. First operand has 111 places, 87 transitions, 767 flow. Second operand 4 states and 2021 transitions. [2023-08-29 22:56:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 128 transitions, 1328 flow [2023-08-29 22:56:27,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 128 transitions, 1325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:56:27,937 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 1030 flow [2023-08-29 22:56:27,937 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} [2023-08-29 22:56:27,938 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2023-08-29 22:56:27,938 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 1030 flow [2023-08-29 22:56:27,938 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) [2023-08-29 22:56:27,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:56:27,939 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] [2023-08-29 22:56:27,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 22:56:27,939 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2023-08-29 22:56:27,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:56:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -21542784, now seen corresponding path program 1 times [2023-08-29 22:56:27,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:56:27,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088790318] [2023-08-29 22:56:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:56:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:30,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:56:30,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088790318] [2023-08-29 22:56:30,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088790318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:56:30,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780874019] [2023-08-29 22:56:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:56:30,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:56:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:56:30,412 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) [2023-08-29 22:56:30,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 22:56:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:56:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 22:56:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:56:31,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:56:31,571 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 [2023-08-29 22:56:31,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:56:31,620 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 [2023-08-29 22:56:31,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:56:31,671 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 [2023-08-29 22:56:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 22:56:32,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:56:34,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:56:34,883 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 [2023-08-29 22:56:34,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 22:56:34,896 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 [2023-08-29 22:56:52,162 WARN L222 SmtUtils]: Spent 16.27s 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) [2023-08-29 22:56:52,701 INFO L321 Elim1Store]: treesize reduction 21, result has 91.3 percent of original size [2023-08-29 22:56:52,702 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 [2023-08-29 23:02:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-29 23:02:52,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780874019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:02:52,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:02:52,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-29 23:02:52,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593327851] [2023-08-29 23:02:52,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:02:52,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-29 23:02:52,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:02:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-29 23:02:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-29 23:02:54,822 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] [2023-08-29 23:02:56,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:03:01,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:03:05,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 1241 [2023-08-29 23:03:05,338 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) [2023-08-29 23:03:05,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:03:05,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 1241 [2023-08-29 23:03:05,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:03:43,325 WARN L222 SmtUtils]: Spent 28.39s 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) [2023-08-29 23:04:10,978 WARN L222 SmtUtils]: Spent 24.39s 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) [2023-08-29 23:04:31,688 WARN L222 SmtUtils]: Spent 20.51s 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) [2023-08-29 23:04:55,208 WARN L222 SmtUtils]: Spent 23.44s 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) [2023-08-29 23:04:57,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:05:22,260 WARN L222 SmtUtils]: Spent 24.37s on a formula simplification. DAG size of input: 117 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:05:43,917 WARN L222 SmtUtils]: Spent 21.57s on a formula simplification. DAG size of input: 174 DAG size of output: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:06:06,535 WARN L222 SmtUtils]: Spent 22.52s on a formula simplification. DAG size of input: 118 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:06:08,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:06:37,542 WARN L222 SmtUtils]: Spent 22.00s 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) [2023-08-29 23:06:58,082 WARN L222 SmtUtils]: Spent 20.43s 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) [2023-08-29 23:07:18,803 WARN L222 SmtUtils]: Spent 20.62s 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) [2023-08-29 23:07:20,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:07:39,728 WARN L222 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 102 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:07:45,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:07:47,385 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] Killed by 15